It's a device on the oxygen tanks to make the supply last longer.

HCPCS code E1390: Oxygen Concentrator, Single Delivery Port (≥85% O₂)
Learn more about the documentation and billing requirements of HCPCS code E1390 from our short guide for accurate use and billing.
Frequently asked questions
Use E1390 when a beneficiary requires a stationary concentrator capable of delivering ≥85% oxygen via a single delivery port, and portable alternatives are insufficient. Documentation must include hypoxemia evidence and a qualifying F2F evaluation.
No. Servicing of portable systems must be billed under E1392, not E1390. The code E1390 is strictly for stationary concentrator servicing/rental. Only one maintenance visit is reimbursable every six months across all oxygen equipment.
Yes—if a portable concentrator is used in conjunction, E1392 may be billed separately for the portable unit, but only after verifying eligibility and ensuring E1390 has been properly assigned.
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