CPT 97033 Iontophoresis Billing: 2026 Documentation Guide

by Service, Training and Support·January 23, 2026

Iontophoresis

Iontophoresis billing involves more than selecting a procedure code. A compliant claim must distinguish among the professional service, direct treatment time, disposable delivery system, medication, diagnosis, therapy discipline, and payer-specific coverage rules.

The central procedure code is CPT 97033, a constant-attendance physical medicine modality reported in 15-minute increments. That does not mean every 15 minutes that medication remains beneath an electrode or wearable patch can be billed. For Medicare, the service generally requires skilled, direct one-on-one contact, and units are calculated using Medicare’s timed-code methodology.

This guide is educational and does not guarantee coverage or payment. CPT, HCPCS, ICD-10-CM, modifier, and payer requirements change. Verify current rules with the patient’s insurer, Medicare Administrative Contractor, facility compliance department, and professional billing specialist before submitting a claim.

For clinical product information, browse our iontophoresis patches, electrodes, and dose controllers.

Iontophoresis Billing Quick Reference

Billing element	Practical guidance
CPT 97033	Primary timed procedure code commonly associated with professionally administered iontophoresis
Time basis	Reported in 15-minute increments under the payer’s timed-code methodology
Medicare contact requirement	Direct one-on-one or constant attendance is generally required
Wearable-patch time	Hours worn outside direct treatment do not automatically become billable units
GP modifier	Identifies services furnished under a physical therapy plan of care
GO modifier	Identifies services furnished under an occupational therapy plan of care
CQ or CO	May apply when a PTA or OTA furnishes all or part of a service under Medicare rules
KX modifier	Used for medically necessary therapy above the annual Medicare threshold when documentation supports continued care
A4556	Generic DME electrode code—not an iontophoresis-specific supply code
J1100	Describes injectable dexamethasone sodium phosphate—not automatically appropriate for transdermal iontophoresis
Diagnosis code	Must represent the patient’s documented condition; no diagnosis code guarantees payment
Supplies and medication	Separate reimbursement depends on item, route, setting, benefit category, contract and payer policy
Prior authorization	May be required by commercial or Medicare Advantage plans
Coverage	Can vary by payer, state, Medicare contractor, diagnosis and treatment setting

Coding, Coverage, and Payment Are Different Questions

These terms are frequently treated as though they mean the same thing.

Question	What it actually asks
Is there a code?	Does a CPT, HCPCS, or ICD-10-CM code describe the service, supply, drug, or diagnosis?
Is it covered?	Does the patient’s benefit plan cover that service for the diagnosis, provider, and setting?
Will it be paid separately?	Is the item separately payable, bundled into another service, or subject to contractual packaging?
Is authorization required?	Must approval be obtained before treatment begins?
Is the service medically necessary?	Does the record show why the service is reasonable, skilled, and functionally relevant?
Is the claim payable as submitted?	Were the code, units, modifiers, diagnosis, place of service, and documentation correct?

A valid code does not guarantee coverage. Coverage does not guarantee separate payment for every component. A payer may recognize CPT 97033 but restrict it to certain diagnoses, require prior authorization, bundle disposable supplies, or apply a contractual limitation.

What Is CPT 97033?

CPT 97033 is the code generally used for professionally administered iontophoresis requiring constant attendance. It belongs to the family of timed physical medicine and rehabilitation modality codes.

For Medicare fee-for-service therapy, the clinician must personally provide qualifying direct treatment and document the minutes. The provider cannot count unattended delivery time or simultaneously provide another treatment to another patient as direct one-on-one 97033 time.

What may count toward direct treatment time?

Depending on payer rules and the circumstances of the encounter, qualifying skilled time may include direct patient care associated with the following:

Assessing the treatment site and skin
Confirming medication, polarity, and contraindications
Preparing and positioning the active and return electrodes
Applying the delivery system
Adjusting current or controller settings
Monitoring the patient during controller-based treatment
Responding to discomfort or resistance warnings
Removing the system and inspecting the skin
Providing treatment-specific removal or safety education while directly engaged with the patient

Only payer-defined qualifying minutes should be counted. Preparation completed away from the patient, ordinary documentation after the visit, supply retrieval, unattended patch wear, and general room time should not automatically be included.

Medicare’s Timed-Code Rule

Medicare calculates units from the total qualifying minutes of all timed therapy services furnished on the date of service. When only one timed service is provided, at least eight minutes are generally required to report one unit. When several timed services are provided, their qualifying minutes are added before the maximum number of units is determined.

Medicare Timed-Service Ranges

Total qualifying timed-treatment minutes	Maximum timed units
0–7 minutes	0 units
8–22 minutes	1 unit
23–37 minutes	2 units
38–52 minutes	3 units
53–67 minutes	4 units
68–82 minutes	5 units
83–97 minutes	6 units
98–112 minutes	7 units

These are Medicare fee-for-service ranges. Commercial plans, workers’ compensation programs, Medicaid plans, and Medicare Advantage organizations may use another method.

Example 1: Iontophoresis only

The therapist provides 14 minutes of qualifying direct iontophoresis care.

Potential timed-code calculation: One unit of 97033, assuming coverage, medical necessity, and all other requirements are met.

Example 2: Less than eight minutes

The clinician spends six qualifying direct minutes applying and educating the patient about a wearable patch, and no other timed therapy service is furnished.

Medicare calculation: The six minutes do not independently support one timed unit.

Example 3: Iontophoresis plus therapeutic exercise

The therapist documents:

15 minutes of iontophoresis
10 minutes of therapeutic exercise
25 total timed minutes

The day supports a maximum of two timed units. The units are allocated among the services according to their documented minutes and Medicare’s allocation methodology. The clinic should not bill two units of 97033 unless the iontophoresis minutes themselves justify that allocation.

Example 4: Patch worn after departure

The clinician provides 12 qualifying direct minutes to assess the skin, prepare and apply a wearable patch, and provide product-specific instructions. The patch remains in place for eight hours after the patient leaves.

Only the qualifying direct-contact minutes enter the Medicare timed-code calculation. The eight-hour wear period does not become 32 billable units of 97033. This conclusion follows from Medicare’s direct-contact requirement for timed therapy modalities.

Controller-Based Iontophoresis vs. Wearable Patches

The delivery format changes the clinical workflow, but it does not create a separate universal billing code.

Billing consideration	Controller and wired electrodes	Wearable patch
Example products	ActivaDose II with Ionto4 or Trivarion	IontoPatch or ACTIVApatch
Electrical source	Reusable external dose controller	Integrated into disposable patch
Treatment setting	Commonly completed while connected to clinical equipment	May continue after the patient leaves
Clinician selects current	Usually yes	Current is determined by patch design
The clinician selects a dose.	Programs the controller	Selects a patch with the required capacity
Direct monitoring	Usually continues through treatment	Commonly concentrated around evaluation, application and education
Wear or delivery time	Often minutes	Frequently several hours
97033 times	Qualifying direct one-on-one minutes	Qualifying direct one-on-one minutes—not total wear time
Disposable supply issue	Active and return-electrode kit	The entire patch is disposable
Separate supply payment	Payer- and setting-specific	Payer- and setting-specific

For clinical differences among delivery formats, use our Iontophoresis Frequently Asked Questions and IontoPatch vs. ACTIVApatch comparison. This billing page should remain focused on coding and documentation rather than duplicating application instructions.

Is A4556 the Correct Code for Iontophoresis Electrodes?

Not automatically.

HCPCS A4556 is a generic DME supply code for electrodes billed per pair. Its descriptor is not specific to iontophoresis, medication reservoirs, buffered return electrodes, or wearable drug-delivery patches.

The existence of A4556, therefore, does not establish that:

An iontophoresis electrode kit meets that code’s definition.
The item qualifies under the patient’s DME benefit.
A therapy clinic may bill it separately.
The payer considers it separately payable.
A wearable patch is equivalent to a generic electrode pair.
The supply is not packaged into the procedure or facility payment.

Before reporting A4556, ask the payer:

Does A4556 apply to the exact manufacturer product and package configuration?
Is the item considered DME, a disposable medical supply, or part of the professional service?
Is separate payment available in this place of service?
Must the item be supplied by an enrolled DMEPOS supplier?
Is the quantity reported per pair, per kit, or another unit?
Is prior authorization required?
Is the supply bundled into 97033 or another payment?
Does the payer have a preferred or required alternative code?
What invoice, product, or proof-of-delivery documentation is required?
Does the clinic’s contract prohibit separate supply billing?

Do not add A4556 simply because two electrodes were used.

Can J1100 Be Used for Dexamethasone Iontophoresis?

It should not be treated as an automatic iontophoresis drug code.

J1100 describes the injection of dexamethasone sodium phosphate in a one-milligram unit. Medication delivered through intact skin using iontophoresis is not administered by injection. That route difference is material when selecting a drug code.

A clinic should not assume that a payer will accept J1100 merely because dexamethasone sodium phosphate was prescribed.

Questions to resolve before billing medication separately

Question	Why it matters
What exact medication was used?	The brand, generic name and salt form must match the record
What was the concentration?	Concentration is not the same as total administered quantity
What volume was loaded?	Reservoir volume does not equal the amount transported through the skin
What was the route?	Injection, transdermal and topical administration are not interchangeable
Who supplied the medication?	Clinic, pharmacy, patient and facility-supplied drugs may follow different rules
Is there a current route-appropriate HCPCS code?	A code must match the product and administration route
Is the medication separately payable?	It may be packaged, excluded or subject to another benefit
Is NDC reporting required?	Medicaid and other payers may require NDC data
How are units calculated?	Units must follow the selected code descriptor—not reservoir capacity
Is wastage reporting applicable?	Requirements vary by product, setting and payer

When no code clearly matches the medication and route, obtain written payer guidance rather than force-fitting an injection code or selecting an unspecified code without authorization.

For medication formulation and polarity—not reimbursement coding—refer to our Iontophoresis Medications and Substances Guide.

Therapy Modifiers Commonly Associated with 97033

Modifier requirements vary according to provider discipline, payer, and place of service.

Modifier	General purpose
GP	Service furnished under a physical therapy plan of care
GO	Service furnished under an occupational therapy plan of care
CQ	Outpatient physical therapy service furnished in whole or in part by a physical therapist assistant when Medicare’s applicable threshold is met
CO	Outpatient occupational therapy service furnished in whole or in part by an occupational therapy assistant when Medicare’s applicable threshold is met
KX	Attests that services above the annual Medicare therapy threshold remain medically necessary and are supported by the record
59 or an X modifier	May identify a distinct procedural service only when an edit permits it and documentation supports the distinction

CMS requires the appropriate therapy-discipline modifier on covered outpatient therapy claims and applies CQ or CO under its assistant-services rules.

Modifier 59 should never be appended merely to bypass a denial. CMS updates the National Correct Coding Initiative edits quarterly, so clinics should review the current edit files and payer instructions rather than relying on an old blog table.

2026 Medicare Therapy Thresholds

For calendar year 2026, the KX threshold is

$2,480 for physical therapy and speech-language pathology combined
$2,480 for occupational therapy

The targeted medical-review threshold remains $3,000 for PT and SLP combined and $3,000 for OT through 2028. The KX modifier indicates that continued services are medically necessary and supported by the patient’s record; it does not create automatic coverage.

The threshold is based on allowed therapy amounts accumulated during the calendar year—not the number of iontophoresis visits.

Does Medicare Cover Iontophoresis?

There is no safe universal answer for every diagnosis and jurisdiction.

Medicare coverage can depend on the following:

The patient’s diagnosis
Local Coverage Determination
Medicare Administrative Contractor
Provider type
Place of service
Medical-necessity documentation
Whether the treatment is part of a certified therapy plan
Whether direct-contact requirements were met
Whether the service is considered reasonable for the condition

One active Medicare LCD states that iontophoresis used to deliver anti-inflammatory medication for musculoskeletal conditions is not covered in that jurisdiction, while allowing coverage for severe primary focal hyperhidrosis after standard therapy has failed. That is a local contractor policy, not a national rule for every Medicare patient.

Medicare coverage verification process

Identify the patient’s Medicare contractor and jurisdiction.
Search the Medicare Coverage Database for CPT 97033 and the diagnosis.
Review active LCDs and related billing articles.
Confirm provider qualification and place-of-service requirements.
Verify whether prior documentation of failed conservative care is required.
Confirm whether the patient is receiving Medicare fee-for-service or Medicare Advantage.
For Medicare Advantage, contact the plan directly for authorization and network requirements.
Retain the policy or reference number used in the verification.

Do not describe iontophoresis as universally “Medicare covered” or “not covered.”

Choosing the Diagnosis Code

There is no single ICD-10-CM code for “iontophoresis treatment.”

The diagnosis code should describe the documented condition being evaluated and treated. It should not be selected solely because it appears on a reimbursement list or because it is believed to increase the chance of payment.

Diagnosis-coding principles

Code the condition established and documented by the qualified provider.
Use the highest supported level of specificity.
Include laterality when the code set requires it.
Do not code a suspected diagnosis as confirmed when outpatient coding rules prohibit it.
Ensure the diagnosis supports the functional limitation and treatment plan.
Confirm that the payer’s policy recognizes the diagnosis for 97033.
Do not substitute a covered diagnosis for the condition actually treated.
Update the claim when the diagnosis changes or is clarified.

A diagnosis may be clinically accurate and still fall outside a payer’s coverage policy.

Plan-of-Care Requirements

When iontophoresis is furnished as outpatient Medicare therapy, it must fit within the applicable therapy plan of care and certification framework.

The record should connect the modality to:

The patient’s diagnosis
Measurable functional limitation
Long-term treatment goal
Short-term objective
Frequency and duration of therapy
Expected clinical progression
Need for skilled intervention
Reassessment plan

CMS expects the therapy plan to identify diagnoses, goals, type of therapy, amount, frequency, and duration and to meet applicable certification requirements.

A treatment note that only says “iontophoresis performed” does not establish why the modality required skilled care or how it contributed to functional improvement.

Documentation element	What to record
Diagnosis	Condition, location and laterality
Functional problem	Activity or task affected by the condition
Baseline findings	Pain, motion, strength, swelling, tenderness or another relevant measure
Medical necessity	Why iontophoresis was selected and why skilled care was required
Medication	Full name, salt form and concentration
Prescribing information	Order or prescription details when required
Allergy screening	Medication, adhesive and electrical-current history
Delivery system	Brand, model and type of controller, electrode or patch
Active-electrode polarity	Positive or negative
Medication volume	Amount loaded into the reservoir
Electrical dose	Programmed or product-rated mA-min
Current	Selected and actual current for controller-based treatment
Treatment location	Exact active and return-electrode sites
Skin before treatment	Intact, clean, dry and free of contraindicated findings
Direct treatment time	Qualifying one-on-one minutes
Total timed minutes	Total timed therapy minutes for the date of service
Total treatment time	Timed and untimed visit duration when required
Patient response	Sensation, comfort and functional or symptom response
Skin after treatment	Redness, irritation, blistering or no reaction
Education	Wear, activity, removal and warning-sign instructions
Interruptions	Pauses, resistance warnings, early removal or incomplete treatment
Units and modifiers	Codes and modifiers supported by the encounter
Plan	Reassessment, progression or discontinuation criteria

Sample Iontophoresis Treatment Note

The example below illustrates documentation structure only. It is not a prescription or guarantee of reimbursement.

Diagnosis and functional limitation: Patient reports localized [right/left] [body-region] symptoms affecting [specific activity]. Baseline [pain, motion, strength or functional measure] recorded as [result].

Rationale: Iontophoresis selected as an adjunct to the established plan of care to address [documented treatment objective]. Skilled care was required for skin assessment, medication verification, polarity selection, electrode placement, current adjustment and monitoring.

Medication and device: Verified order for [full medication name and salt form], concentration [ ], volume [ ]. Applied using [device/patch] and [electrode model]. Active electrode connected to [positive/negative] polarity at [exact location]; return electrode positioned at [location].

Parameters: Electrical dose [ ] mA-min; current [ ] mA; qualifying direct treatment time [ ] minutes. Total timed therapy minutes for the visit [ ]; total treatment time [ ].

Response: Patient reported [sensation/tolerance]. Skin remained [description] during treatment. Following treatment, [objective or functional response] was recorded. No [or describe] adverse skin reaction.

Education: Reviewed [wear time, activity limits, removal instructions and warning signs] as applicable.

Plan: Continue, modify or discontinue based on [defined reassessment finding or functional goal].

Avoid clichéd language. The note should reflect what occurred during that patient’s encounter.

Common Claim Errors

Claim or documentation error	Why it creates risk	Better approach
Billing the patch’s entire wear period	Wear time is not direct one-on-one treatment time	Report only qualifying direct-contact minutes
Automatically billing A4556	It is not an iontophoresis-specific code	Obtain payer confirmation for the exact item and setting
Automatically billing J1100	Its descriptor specifies injection	Verify a route-appropriate code and written payer policy
Reporting reservoir volume as drug units	Volume does not equal milligrams delivered	Follow the exact drug-code descriptor and documented quantity
Using a diagnosis because it appears on a coverage list	The code may not match the patient’s condition	Code the documented diagnosis accurately
Billing one unit for fewer than eight minutes under Medicare	Does not independently meet the timed-code threshold	Aggregate qualifying timed minutes correctly
Counting unattended wear as skilled time	Does not satisfy direct-contact requirements	Separate direct service time from device-wear time
Reporting two units for a 20-minute service	Twenty minutes supports one Medicare timed unit	Use the Medicare minute ranges
Omitting total timed minutes	Prevents review of unit calculation	Document total timed and total visit minutes
Using modifier 59 to force payment	May be viewed as bypassing an NCCI edit	Use only when the services are truly distinct and the edit permits it
Using KX without supporting records	KX is an attestation of medical necessity	Ensure the plan, goals and notes support continued therapy
Failing to identify the medication or polarity	Makes the treatment difficult to validate	Document formulation, concentration, volume and polarity
Treating a preset wear time as a billed duration	Product duration and professional-service time differ	Document them separately
Reusing cloned notes	Fails to demonstrate individual skilled care	Record patient-specific findings and response

Payer Verification Checklist

Before beginning a series of iontophoresis treatments, ask the payer:

Question	Information to obtain
Is CPT 97033 covered?	Coverage for the member’s plan and diagnosis
Is authorization required?	Authorization number, approved visits and date range
Which providers may bill it?	PT, OT, physician, clinic or another provider type
Which place of service is covered?	Office, outpatient facility, hospital or home
Which timed-code method applies?	Medicare aggregate rule or another methodology
Are GP or GO required?	Discipline-modifier requirements
Do CQ or CO apply?	Assistant involvement requirements
Are disposable electrodes separately payable?	Applicable code, units, and documentation
Is a wearable patch separately payable?	Supply benefit, code and quantity
Is the medication separately payable?	Route-appropriate code and billing unit
Are NDC details required?	NDC format and quantity
Are supplies packaged into 97033?	Contractual or facility-payment rule
Are there diagnosis limitations?	Covered and excluded conditions
Is conservative treatment required first?	Step-therapy or failed-treatment documentation
Are there visit or frequency limits?	Annual, episode or diagnosis-specific limits
Is an ABN or other notice appropriate?	Follow applicable Medicare and payer rules
What is the call reference number?	Record the representative, date and reference

Benefit verification is not a payment guarantee. Retain the date, representative, reference number, and policy reviewed.

Iontophoresis Product Selection and Billing Workflow

Product choice should be based on the clinical protocol first and the reimbursement pathway second.

Workflow need	Product pathway	Billing consideration
Clinician-controlled current and shorter connected treatment	ActivaDose II Dose Controller	Direct monitored treatment time may be easier to distinguish
Multiple reservoir shapes and volumes	Ionto4 Electrodes	Verify whether the disposable kit is included or separately payable
Flexible wired electrode construction	Trivarion Delivery Kits	Do not assume a generic electrode code applies
Extended-wear patch with saline workflow	IontoPatch	Do not convert total wear time into 97033 units
Extended-wear patch without separate saline	ACTIVApatch	Application time and product-delivery time must be documented separately
Protocol comparison	IontoPatch vs. ACTIVApatch	Clinical differences do not automatically create different professional codes

The same billing code may be used across different delivery formats when the service meets its definition, but the amount of qualifying direct treatment time can differ substantially.

Frequently Asked Questions

Is CPT 97033 the main iontophoresis code?

It is the principal CPT code commonly associated with constant-attendance iontophoresis. Coverage and payment still depend on the payer, diagnosis, provider, setting, and documentation.

Is CPT 97033 billed in 15-minute units?

Yes. For Medicare, units are calculated under the aggregate timed-code rule. One unit generally requires at least eight qualifying minutes when it is the only timed service.

Must the therapist stay with the patient?

Medicare policies describe 97033 as requiring direct one-on-one or constant attendance. Unattended patch delivery does not become direct treatment time.

Can an eight-hour wearable patch be billed as 32 units?

No. The patch’s wear period and the clinician’s qualifying direct-contact time are separate.

Can the application time be billed?

Qualifying direct skilled application, assessment, monitoring, and education time may enter the timed-code calculation when the service meets the code and payer requirements. Routine supply handling, unattended wear, and nonqualifying time should not be counted.

Is A4556 the standard code for iontophoresis electrodes?

No. It is a generic DME electrode code and is not specific to iontophoresis delivery kits. Obtain payer guidance before reporting it.

Can a wearable patch be billed with A4556?

Do not assume so. A wearable drug-delivery patch is not necessarily equivalent to a generic electrode pair under the payer’s policy.

Is J1100 the correct code for dexamethasone iontophoresis?

Not automatically. J1100 specifies injectable dexamethasone sodium phosphate. The iontophoresis route is transdermal rather than injectable, so a payer must confirm whether and how the medication may be reported.

Does loading one milliliter mean one billable drug unit?

No. Milliliters, concentration, milligrams loaded, and amount transported are different measurements. Billing units must follow the exact HCPCS descriptor and payer policy.

Is the medication included in CPT 97033?

CPT 97033 describes the professional modality service. Whether medication or supplies are separately payable, bundled, or excluded depends on the setting and payer.

Does Medicare cover iontophoresis for tendonitis?

Coverage is contractor- and diagnosis-specific. At least one active local Medicare policy excludes anti-inflammatory drug iontophoresis for musculoskeletal conditions. Check the policy applicable to the patient’s jurisdiction rather than relying on a national generalization.

Does Medicare cover iontophoresis for hyperhidrosis?

Some local Medicare policies provide coverage for severe primary focal hyperhidrosis when specified criteria are met. This is not a universal statement for all contractors or plans.

Which modifier should a physical therapist use?

GP generally identifies services furnished under a physical therapy plan of care. Other modifiers may apply depending on assistant involvement, threshold status, and claim circumstances.

Which modifier should an occupational therapist use?

GO generally identifies services furnished under an occupational therapy plan of care.

When is KX needed in 2026?

For Medicare fee-for-service, KX applies when medically necessary therapy exceeds the 2026 threshold of $2,480 for PT and SLP combined or $2,480 for OT. Documentation must support continued care.

Can modifier 59 be used when another therapy code is denied?

Only when the current NCCI edit permits a modifier and the services are genuinely distinct. It should not be used merely to override a denial.

What diagnosis code should be used?

Use the ICD-10-CM code that accurately represents the documented condition. No diagnosis code guarantees coverage for 97033.

Should the note include the electrical dose?

Yes. Record the mA-min dose, current when applicable, direct treatment time, medication, volume, polarity, placement, skin findings, and patient response.

Should the patch’s full wear time be documented?

Yes, as a product-use instruction or delivery period when relevant—but separate from qualifying billable direct-contact minutes.

Does a provider need to document total timed minutes?

For Medicare outpatient therapy, document total timed-code minutes and total treatment time.

Final Claim Checklist

Before submitting a claim, confirm:

The patient’s eligibility and benefits were verified.
Authorization was obtained when required.
The diagnosis accurately reflects the condition treated.
The payer’s coverage policy was reviewed.
CPT 97033 matches the service actually furnished.
Only qualifying direct-contact minutes were counted.
Total timed minutes support the number of units.
Wearable-patch hours were not reported as direct treatment time.
The correct GP or GO modifier was applied.
CQ or CO was added when applicable.
KX was used only when threshold and medical-necessity requirements were met.
Any NCCI modifier is supported by current edits and documentation.
Medication name, concentration, volume, and route are documented.
The active-electrode polarity and treatment sites are recorded.
Electrical dose and current are recorded.
Skin condition and patient response are documented.
A4556 was not added without payer and product verification.
J1100 was not added merely because dexamethasone was used.
Supply and medication payment rules were confirmed.
The record connects the modality to a measurable functional objective.
The claim matches the plan of care and provider credentials.

Key Takeaway

The most defensible iontophoresis claim begins with five distinctions:

CPT 97033 represents the skilled professional modality—not every hour of medication delivery.
Medicare timed units are based on qualifying direct-treatment minutes.
A4556 is not an iontophoresis-specific electrode code.
J1100 specifies an injectable drug and should not automatically be applied to transdermal delivery.
Coding, coverage, and separate payment must each be verified.

Clinical product selection and application guidance are available through our Iontophoresis Collection, Iontophoresis Frequently Asked Questions, Medication and Polarity Guide, and Electrode Directions for Use.

Coding and payer policies change. Review this page at least annually and whenever CMS, CPT, HCPCS, NCCI, or major payer policies are updated.

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