E0434 HCPCS code: Portable liquid oxygen system, rental; includes portable container, supply reservoir, humidifier, flowmeter, refill adaptor, contents gauge, cannula or mask, and tubing
E0434 is the HCPCS Level II code for portable liquid oxygen system, rental; includes portable container, supply reservoir, humidifier, flowmeter, refill adaptor, contents gauge, cannula or mask, and tubing. The 2026 Medicare DMEPOS fee schedule pays $46.28 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 47% from 2022 to 2024 (13,811 to 7,252 services). In 2024, 232 suppliers billed Medicare for E0434 (rentals), serving 1,076 beneficiaries; Idaho, Massachusetts, Colorado accounted for 45% of services. Its average fee ranks 4 of 19 E04 codes billed RR (family range $5.28–$1,572.12); rural fees run 48% 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 | 1993-01-01 |
2026 Medicare DMEPOS fee schedule for E0434
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| RR | rental (monthly) | $46.28 | $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 | $48.20 | $88.58 |
| CO | RR | $50.70 | $88.58 |
| CT | RR | $50.81 | $88.58 |
| DC | RR | $49.59 | $88.58 |
| DE | RR | $49.59 | $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 | $50.70 | $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 | $50.81 | $88.58 |
| MD | RR | $49.59 | $88.58 |
| ME | RR | $50.81 | $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 | $50.70 | $88.58 |
| NC | RR | $50.11 | $88.58 |
| ND | RR | $50.08 | $88.58 |
| NE | RR | $50.08 | $88.58 |
| NH | RR | $50.81 | $88.58 |
| NJ | RR | $49.59 | $88.58 |
| NM | RR | $49.08 | $88.58 |
| NV | RR | $48.20 | $88.58 |
| NY | RR | $49.59 | $88.58 |
| OH | RR | $49.66 | $88.58 |
| OK | RR | $49.08 | $88.58 |
| OR | RR | $48.20 | $88.58 |
| PA | RR | $49.59 | $88.58 |
| PR | RR | $88.58 | — |
| RI | RR | $50.81 | $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 | $50.70 | $88.58 |
| VA | RR | $50.11 | $88.58 |
| VI | RR | $88.58 | — |
| VT | RR | $50.81 | $88.58 |
| WA | RR | $48.20 | $88.58 |
| WI | RR | $49.66 | $88.58 |
| WV | RR | $50.11 | $88.58 |
| WY | RR | $50.70 | $88.58 |
How the E0434 fee compares
| Measure | Value |
|---|---|
| Rank among 19 E04 codes billed RR (lowest = 1) | 4 |
| Family fee range (average of state fees) | $5.28–$1,572.12 |
| Rural fee uplift | 47.9% |
Who bills E0434 (2024)
| Measure | Value |
|---|---|
| Suppliers billing rentals | 232 |
| Suppliers billing purchases | — |
| Referring clinicians | 850 |
| Medicare beneficiaries | 1,076 |
| States with claims | 44 |
| Share of services in top 3 states (Idaho, Massachusetts, Colorado) | 45% |
| Year | Suppliers | Beneficiaries |
|---|---|---|
| 2022 | 382 | 2,017 |
| 2023 | 309 | 1,613 |
| 2024 | 232 | 1,076 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for E0434, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 13,811 | 2,017 | $44.67 | $32.90 |
| 2023 | 10,505 | 1,613 | $47.33 | $34.54 |
| 2024 | 7,252 | 1,076 | $47.95 | $34.98 |
States with the most E0434 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| Idaho | 1,215 | $36.69 |
| Massachusetts | 1,043 | $36.59 |
| Colorado | 1,010 | $35.70 |
| Nebraska | 486 | $33.47 |
| Indiana | 471 | $33.19 |
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 E0434
- 2026-01-01: Average state fee (RR) rose 2.6%: $50.25 to $51.55
- 1993-01-01: E0434 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 E0434?
E0434 is the HCPCS Level II code for portable liquid oxygen system, rental; includes portable container, supply reservoir, humidifier, flowmeter, refill adaptor, contents gauge, cannula or mask, and tubing. Short descriptor: "Portable liquid 02".
How much does Medicare pay for E0434?
Under the 2026 DMEPOS fee schedule, non-rural state fees are RR (rental (monthly)): $46.28–$88.58. Rural fees can be higher.
Does Medicare cover E0434?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
Did the Medicare fee for E0434 change in 2026?
The average non-rural state fee for RR moved from $50.25 in 2025 to $51.55 in 2026 (+2.6%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
How many units of E0434 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
- E0431 — Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing ($21.24–$88.58)
- 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)
- 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 E0434
- Watch E0434 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for E0434
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.