E0431 HCPCS code: Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing
E0431 is the HCPCS Level II code for portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing. The 2026 Medicare DMEPOS fee schedule pays $21.24 to $88.58 (RR, rental (monthly)) depending on the state. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met. The NCCI unit limit is 1 per day on DME suppliers. Medicare volume fell 22% from 2022 to 2024 (2,918,392 to 2,275,426 services). In 2024, 3,822 suppliers billed Medicare for E0431 (rentals), serving 359,326 beneficiaries; California, Texas, Florida accounted for 21% of services. Its average fee ranks 2 of 19 E04 codes billed RR (family range $5.28–$1,572.12); rural fees run 63% higher.
Code details
| Field | Value |
|---|---|
| Section | E codes — Durable medical equipment |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 33 — DMEPOS: oxygen and oxygen equipment |
| BETOS category | D1C — Oxygen and supplies |
| Added | 1993-01-01 |
| Last action effective | 2001-01-01 |
2026 Medicare DMEPOS fee schedule for E0431
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| RR | rental (monthly) | $21.24 | $88.58 | — | — |
| State | Modifier | Fee | Rural fee |
|---|---|---|---|
| AK | RR | $88.58 | — |
| AL | RR | $50.11 | $88.58 |
| AR | RR | $50.11 | $88.58 |
| AZ | RR | $49.08 | $88.58 |
| CA | RR | $47.28 | $88.58 |
| CO | RR | $50.56 | $88.58 |
| CT | RR | $49.77 | $88.58 |
| DC | RR | $48.20 | $88.58 |
| DE | RR | $48.20 | $88.58 |
| FL | RR | $50.11 | $88.58 |
| GA | RR | $50.11 | $88.58 |
| HI | RR | $88.58 | — |
| IA | RR | $50.08 | $88.58 |
| ID | RR | $50.56 | $88.58 |
| IL | RR | $49.66 | $88.58 |
| IN | RR | $49.66 | $88.58 |
| KS | RR | $50.08 | $88.58 |
| KY | RR | $50.11 | $88.58 |
| LA | RR | $50.11 | $88.58 |
| MA | RR | $49.77 | $88.58 |
| MD | RR | $48.20 | $88.58 |
| ME | RR | $49.77 | $88.58 |
| MI | RR | $49.66 | $88.58 |
| MN | RR | $50.08 | $88.58 |
| MO | RR | $50.08 | $88.58 |
| MS | RR | $50.11 | $88.58 |
| MT | RR | $50.56 | $88.58 |
| NC | RR | $50.11 | $88.58 |
| ND | RR | $50.08 | $88.58 |
| NE | RR | $50.08 | $88.58 |
| NH | RR | $49.77 | $88.58 |
| NJ | RR | $48.20 | $88.58 |
| NM | RR | $49.08 | $88.58 |
| NV | RR | $47.28 | $88.58 |
| NY | RR | $48.20 | $88.58 |
| OH | RR | $49.66 | $88.58 |
| OK | RR | $49.08 | $88.58 |
| OR | RR | $47.28 | $88.58 |
| PA | RR | $48.20 | $88.58 |
| PR | RR | $88.58 | — |
| RI | RR | $49.77 | $88.58 |
| SC | RR | $50.11 | $88.58 |
| SD | RR | $50.08 | $88.58 |
| TN | RR | $50.11 | $88.58 |
| TX | RR | $49.08 | $88.58 |
| UT | RR | $50.56 | $88.58 |
| VA | RR | $50.11 | $88.58 |
| VI | RR | $88.58 | — |
| VT | RR | $49.77 | $88.58 |
| WA | RR | $47.28 | $88.58 |
| WI | RR | $49.66 | $88.58 |
| WV | RR | $50.11 | $88.58 |
| WY | RR | $50.56 | $88.58 |
How the E0431 fee compares
| Measure | Value |
|---|---|
| Rank among 19 E04 codes billed RR (lowest = 1) | 2 |
| Family fee range (average of state fees) | $5.28–$1,572.12 |
| Rural fee uplift | 63.4% |
Who bills E0431 (2024)
| Measure | Value |
|---|---|
| Suppliers billing rentals | 3,822 |
| Suppliers billing purchases | — |
| Referring clinicians | 145,991 |
| Medicare beneficiaries | 359,326 |
| States with claims | 58 |
| Share of services in top 3 states (California, Texas, Florida) | 21% |
| Year | Suppliers | Beneficiaries |
|---|---|---|
| 2022 | 3,977 | 479,593 |
| 2023 | 3,921 | 422,087 |
| 2024 | 3,822 | 359,326 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for E0431, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 2,918,392 | 479,593 | $22.48 | $16.55 |
| 2023 | 2,715,621 | 422,087 | $24.24 | $17.74 |
| 2024 | 2,275,426 | 359,326 | $23.99 | $17.44 |
States with the most E0431 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| California | 198,409 | $15.98 |
| Texas | 144,991 | $17.12 |
| Florida | 129,679 | $15.97 |
| Ohio | 84,209 | $17.41 |
| Pennsylvania | 83,999 | $16.40 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| DME suppliers | 1 | Code Descriptor / CPT Instruction |
Medicare policy articles for this code
- A52514: Oxygen and Oxygen Equipment - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
What changed for E0431
- 2026-01-01: Average state fee (RR) rose 2.6%: $41.50 to $42.60
- 1993-01-01: E0431 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 E0431?
E0431 is the HCPCS Level II code for portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing. Short descriptor: "Portable gaseous 02".
How much does Medicare pay for E0431?
Under the 2026 DMEPOS fee schedule, non-rural state fees are RR (rental (monthly)): $21.24–$88.58. Rural fees can be higher.
Does Medicare cover E0431?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
Did the Medicare fee for E0431 change in 2026?
The average non-rural state fee for RR moved from $41.50 in 2025 to $42.60 in 2026 (+2.6%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
How many units of E0431 can be billed per day?
1 on DME suppliers (NCCI medically unlikely edits).
Related E04 codes
- E0424 — Stationary compressed gaseous oxygen system, rental; includes container, contents, regulator, flowmeter, humidifier, nebulizer, cannula or mask, and tubing ($94.56–$177.16)
- E0425 — Stationary compressed gas system, purchase; includes regulator, flowmeter, humidifier, nebulizer, cannula or mask, and tubing
- E0430 — Portable gaseous oxygen system, purchase; includes regulator, flowmeter, humidifier, cannula or mask, and tubing
- E0433 — Portable liquid oxygen system, rental; home liquefier used to fill portable liquid oxygen containers, includes portable containers, regulator, flowmeter, humidifier, cannula or mask and tubing, with or without supply reservoir and contents gauge ($46.28–$88.58)
- E0434 — Portable liquid oxygen system, rental; includes portable container, supply reservoir, humidifier, flowmeter, refill adaptor, contents gauge, cannula or mask, and tubing ($46.28–$88.58)
- E0435 — Portable liquid oxygen system, purchase; includes portable container, supply reservoir, flowmeter, humidifier, contents gauge, cannula or mask, tubing and refill adaptor
- E0439 — Stationary liquid oxygen system, rental; includes container, contents, regulator, flowmeter, humidifier, nebulizer, cannula or mask, & tubing ($94.56–$177.16)
- E0440 — Stationary liquid oxygen system, purchase; includes use of reservoir, contents indicator, regulator, flowmeter, humidifier, nebulizer, cannula or mask, and tubing
- E0441 — Stationary oxygen contents, gaseous, 1 month's supply = 1 unit ($61.92–$75.90)
- E0442 — Stationary oxygen contents, liquid, 1 month's supply = 1 unit ($61.92–$75.90)
- E0443 — Portable oxygen contents, gaseous, 1 month's supply = 1 unit ($56.56–$72.51)
- E0444 — Portable oxygen contents, liquid, 1 month's supply = 1 unit ($56.56–$72.51)
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under E0431
- Watch E0431 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for E0431
Sources: CMS HCPCS Level II release October 2025; 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.