Summary & Overview
HCPCS E1406: Oxygen and Water Vapor Enriching System, No Heated Delivery
HCPCS Level II code E1406 identifies an oxygen and water vapor enriching system without heated delivery, a form of durable medical equipment used to provide supplemental oxygen with humidification but without a heated interface. Nationally, this category of equipment supports chronic and acute respiratory care in home and outpatient settings, affecting coverage decisions, supplier contracting, and patient access to respiratory therapy devices. Key payers in the national literature and coverage analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
This publication summarizes how E1406 is characterized in coverage frameworks and clinical practice, the typical settings in which the device is supplied, and the implications for billing and claims adjudication. Readers will find benchmark context on payer coverage conventions, a review of relevant policy language and clinical rationale, and practical notes on service classification and common usage scenarios. Data not available in the input will be identified where applicable. The material is intended for national audiences including billing professionals, respiratory equipment suppliers, and policy analysts seeking a concise reference on HCPCS Level II code E1406 and its role in oxygen therapy provision.
Billing Code Overview
HCPCS Level II code E1406 denotes an oxygen and water vapor enriching system without heated delivery. This equipment is used to provide supplemental oxygen with humidification (water vapor enrichment) but does not include a heated delivery component.
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Service type: Durable medical equipment for respiratory support and humidification
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Typical site of service: Home or ambulatory settings where outpatient oxygen therapy is managed
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with chronic hypoxemic respiratory failure, such as from COPD, interstitial lung disease, or pulmonary vascular disease, who requires supplemental oxygen to maintain adequate oxygen saturation at rest or with exertion. The patient is evaluated in outpatient pulmonary or durable medical equipment (DME) clinic following pulse oximetry or arterial blood gas demonstrating resting oxygen saturation ≤88% or significant desaturation with activity. The provider documents the need for a stationary or portable oxygen and water vapor enriching system without heated delivery to provide humidified oxygen to reduce mucosal dryness during prolonged oxygen use.
The clinical workflow includes: initial assessment by a pulmonologist, primary care physician, or DME supplier; documentation of qualifying oxygenation measurements and clinical indications; prescription of the E1406 device with flow settings and delivery instructions; coordination with a DME supplier for device delivery, patient education on use and cleaning, and verification of functioning equipment. Follow-up visits assess symptom control, oxygen saturation, and device tolerance; adjustments or replacement orders are made as clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier. | Use when no specific modifier applies to the claim. |