E1390 — Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate
E1390 is a HCPCS Level II code for oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate. It belongs to the Durable Medical Equipment section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Medically Unlikely Edits — units per day
The most units of E1390 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 0 — never payable MAI 3 — Date of Service Edit: Clinical · CMS Policy
- outpatient
- 0 — never payable MAI 3 — Date of Service Edit: Clinical · CMS Policy
- DME supplier
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for E1390
- Long descriptor
- Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate
- Short descriptor
- Oxygen concentrator
- Added
- January 1, 2000
- BETOS
- D1C
- Pricing indicator
- 33 — DMEPOS
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Oxygen and oxygen equipment. Price subject to floors and ceilings.
Codes adjacent to E1390
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If E1390 is not quite right, the correct code is very often within a few positions of it.
- E1352Oxygen accessory, flow regulator capable of positive inspiratory pressure
- E1353Regulator
- E1354Oxygen accessory, wheeled cart for portable cylinder or portable concentrator, any type, replacement only, each
- E1355Stand/rack
- E1356Oxygen accessory, battery pack/cartridge for portable concentrator, any type, replacement only, each
- E1357Oxygen accessory, battery charger for portable concentrator, any type, replacement only, each
- E1358Oxygen accessory, dc power adapter for portable concentrator, any type, replacement only, each
- E1372Immersion external heater for nebulizer
- E1391Oxygen concentrator, dual delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate, each
- E1392Portable oxygen concentrator, rental
- E1399Durable medical equipment, miscellaneous
- E1405Oxygen and water vapor enriching system with heated delivery
- E1406Oxygen and water vapor enriching system without heated delivery
- E1500Centrifuge, for dialysis
- E1510Kidney, dialysate delivery syst kidney machine, pump recirculating, air removal syst, flowrate meter, power off, heater and temperature control with alarm, i.v. poles, pressure gauge, concentrate container
- E1520Heparin infusion pump for hemodialysis
Questions about E1390
What is HCPCS code E1390?
E1390 is a HCPCS Level II code for oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate. It sits in the Durable Medical Equipment section.
Does Medicare cover E1390?
The CMS HCPCS file marks E1390 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.