A4639 HCPCS code: Replacement pad for infrared heating pad system, each
A4639 is the HCPCS Level II code for replacement pad for infrared heating pad system, each. The 2026 Medicare DMEPOS fee schedule pays $40.94 to $49.14 (RR, rental (monthly)) depending on the state. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. Its average fee ranks 6 of 6 A46 codes billed RR (family range $0.23–$41.09).
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 36 — DMEPOS: capped rental item |
| BETOS category | D1E — Other durable medical equipment |
| Added | 2003-01-01 |
| Last action effective | 2014-04-01 |
2026 Medicare DMEPOS fee schedule for A4639
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| RR | rental (monthly) | $40.94 | $49.14 | $40.94 | $34.80 |
| State | Modifier | Fee | Rural fee |
|---|---|---|---|
| AK | RR | $40.94 | — |
| AL | RR | $40.94 | — |
| AR | RR | $40.94 | — |
| AZ | RR | $40.94 | — |
| CA | RR | $40.94 | — |
| CO | RR | $40.94 | — |
| CT | RR | $40.94 | — |
| DC | RR | $40.94 | — |
| DE | RR | $40.94 | — |
| FL | RR | $40.94 | — |
| GA | RR | $40.94 | — |
| HI | RR | $40.94 | — |
| IA | RR | $40.94 | — |
| ID | RR | $40.94 | — |
| IL | RR | $40.94 | — |
| IN | RR | $40.94 | — |
| KS | RR | $40.94 | — |
| KY | RR | $40.94 | — |
| LA | RR | $40.94 | — |
| MA | RR | $40.94 | — |
| MD | RR | $40.94 | — |
| ME | RR | $40.94 | — |
| MI | RR | $40.94 | — |
| MN | RR | $40.94 | — |
| MO | RR | $40.94 | — |
| MS | RR | $40.94 | — |
| MT | RR | $40.94 | — |
| NC | RR | $40.94 | — |
| ND | RR | $40.94 | — |
| NE | RR | $40.94 | — |
| NH | RR | $40.94 | — |
| NJ | RR | $40.94 | — |
| NM | RR | $40.94 | — |
| NV | RR | $40.94 | — |
| NY | RR | $40.94 | — |
| OH | RR | $40.94 | — |
| OK | RR | $40.94 | — |
| OR | RR | $40.94 | — |
| PA | RR | $40.94 | — |
| PR | RR | $49.14 | — |
| RI | RR | $40.94 | — |
| SC | RR | $40.94 | — |
| SD | RR | $40.94 | — |
| TN | RR | $40.94 | — |
| TX | RR | $40.94 | — |
| UT | RR | $40.94 | — |
| VA | RR | $40.94 | — |
| VI | RR | $40.94 | — |
| VT | RR | $40.94 | — |
| WA | RR | $40.94 | — |
| WI | RR | $40.94 | — |
| WV | RR | $40.94 | — |
| WY | RR | $40.94 | — |
How the A4639 fee compares
| Measure | Value |
|---|---|
| Rank among 6 A46 codes billed RR (lowest = 1) | 6 |
| Family fee range (average of state fees) | $0.23–$41.09 |
| Rural fee uplift | — |
Medicare policy articles for this code
- A52477: Infrared Heating Pad Systems - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
What changed for A4639
- 2026-01-01: Average state fee (RR) rose 2.0%: $40.29 to $41.09
- 2003-01-01: A4639 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code A4639?
A4639 is the HCPCS Level II code for replacement pad for infrared heating pad system, each. Short descriptor: "Infrared ht sys replcmnt pad".
How much does Medicare pay for A4639?
Under the 2026 DMEPOS fee schedule, non-rural state fees are RR (rental (monthly)): $40.94–$49.14. Rural fees can be higher.
Does Medicare cover A4639?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Did the Medicare fee for A4639 change in 2026?
The average non-rural state fee for RR moved from $40.29 in 2025 to $41.09 in 2026 (+2.0%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
Related A46 codes
- A4600 — Sleeve for intermittent limb compression device, replacement only, each
- A4601 — Lithium ion battery, rechargeable, for non-prosthetic use, replacement
- A4602 — Replacement battery for external infusion pump owned by patient, lithium, 1.5 volt, each ($5.31–$6.33)
- A4604 — Tubing with integrated heating element for use with positive airway pressure device ($49.31–$76.79)
- A4605 — Tracheal suction catheter, closed system, each ($23.31–$27.99)
- A4606 — Oxygen probe for use with oximeter device, replacement
- A4608 — Transtracheal oxygen catheter, each ($71.44–$85.73)
- A4611 — Battery, heavy duty; replacement for patient owned ventilator
- A4612 — Battery cables; replacement for patient-owned ventilator
- A4613 — Battery charger; replacement for patient-owned ventilator
- A4614 — Peak expiratory flow rate meter, hand held ($33.89–$40.68)
- A4615 — Cannula, nasal ($1.04–$1.25)
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Next steps
- Run a reimbursement report for a device billed under A4639
- Watch A4639 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A4639
Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.