Summary & Overview
HCPCS Level II E0442: Stationary Liquid Oxygen, 1-Month Supply
HCPCS Level II code E0442 designates a monthly unit of stationary liquid oxygen supply used in home oxygen therapy. This code matters nationally because home oxygen is a common, long-term therapy for patients with chronic respiratory disease, and accurate coding affects durable medical equipment (DME) coverage, claims processing, and beneficiary access. The code reflects a supply-based billing unit—one month per unit—used by suppliers and payers to standardize reimbursement for liquid oxygen delivery.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what E0442 represents, how the service is commonly delivered in the home setting, and the typical billing context for stationary liquid oxygen. The publication summarizes benchmarking and reimbursement context (where available), explains operational implications for DME suppliers and billing offices, and highlights relevant policy considerations affecting coverage and claim adjudication. Data not available in the input will be identified explicitly elsewhere in the document.
Billing Code Overview
HCPCS Level II code E0442 describes stationary liquid oxygen supply, measured as 1 month's supply = 1 unit. The service type is durable medical equipment (DME) oxygen delivery, intended to provide liquid oxygen for patients requiring stationary oxygen therapy at home or in a residential setting. The typical site of service is the patient's home or other non-acute residential setting, where a stationary liquid oxygen system supplies ongoing oxygen needs for chronic respiratory conditions.
Clinical & Coding Specifications
Clinical Context
A 72-year-old male with chronic hypoxemic respiratory failure due to severe chronic obstructive pulmonary disease (COPD) is prescribed stationary liquid oxygen for continuous home use. The patient's pulmonologist orders a one-month supply of liquid oxygen for domiciliary stationary use to maintain prescribed oxygen flow rates overnight and during daytime activities at home. A durable medical equipment provider delivers and sets up the stationary liquid oxygen reservoir at the patient’s residence, provides patient education on system operation and safety, and documents delivery notes, equipment serial numbers, and the physician’s order. Monthly claims use E0442 to report one unit equal to one month’s supply. Typical workflow steps include physician authorization, DME supplier verification of medical necessity and oxygen prescription (flow rate and hours per day), delivery/installation, patient instruction, and recurring monthly billing for ongoing supply and service.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting the professional component of a service that has separate professional and technical components; rarely used with DME but applicable if a clinician bills professional interpretation tied to oxygen monitoring. |