HCPCS Code A7034: Nasal Interface (Mask), Used With PAPD, With or Without Head Strap

Find out how to bill HCPCS code A7034 for nasal masks used with CPAP or BiPAP, including coverage, documentation, and replacement rules.

Use Code

## **What is HCPCS code A7034?** HCPCS code A7034 refers to a nasal interface or mask used with positive airway pressure (PAP) devices, such as CPAP or BiPAP machines. These masks are designed to fit over the nose and deliver continuous or bilevel positive pressure to keep the airway open during sleep. The code includes the mask with or without head straps, so suppliers should not bill separately for the strap component. Each A7034 mask serves as an interface between the device’s tubing and the patient, ensuring efficient air delivery and reducing obstruction events in conditions like obstructive sleep apnea (OSA). Nasal masks differ from full-face or nasal pillow interfaces by providing a balance of comfort and seal stability, making them a common choice among long-term PAP users.

## **HCPCS code A7034 documentation requirements** The documentation requirements listed for HCPCS code A7034 are as follows: - Diagnosis of obstructive sleep apnea (OSA), excessive daytime sleepiness, or relevant condition requiring PAP therapy is required. - A prescription or order from the treating physician for a CPAP/BiPAP device and related supplies must be present. - Medical records should support the medical necessity of PAP therapy, including clinical notes. - Documentation of mask fit, patient usage, tolerance, and compliance is needed. - Proof of delivery of the mask supplied is also necessary.

## **HCPCS code A7034 billing requirements** Proper billing for HCPCS code A7034 requires ensuring the mask is medically necessary, supplied for use with an eligible positive airway pressure (PAP) device, and billed according to payer-specific replacement and documentation rules. ### **Medicare billing** Medicare covers A7034 under Part B DMEPOS. The mask is reimbursed on a per-unit basis, and the replacement frequency is typically one every three months. If a replacement is requested sooner, the documentation must explain why—such as broken parts, loss of seal, or hygiene concerns. Use the NU (new equipment) modifier when billing A7034. Since accessories like nasal masks are purchased items, the RR (rental) modifier does not apply. ### **Medicaid billing** Most state Medicaid programs follow CMS rules but may require prior authorization or have different replacement intervals. Some states allow only one mask every six months rather than every three. ### **Commercial payer billing** Private insurers often mirror Medicare’s coverage schedule but may have slightly looser frequency limits or bundled reimbursement structures. Some payers consider the nasal mask part of a sleep therapy kit and reimburse per episode of care instead of per accessory. ### **Early replacement justification** When submitting claims for early replacement, suppliers should document the reason in the patient’s record. Commonly accepted reasons include loss of seal, visible wear, breakage, or skin reactions to the mask material that necessitate a different model. ### **Bundling and exclusions** A7034 already includes the head strap component. Billing A7035 (headgear) alongside A7034 for the same item will result in a duplicate payment denial. Additionally, A7034 should not be used for interfaces attached to non-PAP devices, such as ventilators or oxygen concentrators. ### **Non-covered situations** A7034 is not covered when the mask is used solely for comfort or preventive purposes, when supplied during a hospital or skilled nursing facility stay (as part of consolidated billing), or when used with devices outside the PAP category.

## **Other relevant codes** - **A7036**: Chinstrap used with a positive airway pressure device - **A7030**: Full face mask used with positive airway pressure device, each - **A7044**: Oral interface used with positive airway pressure device, each - **A7027**: Combination oral/nasal mask, used with continuous positive airway pressure device, each - **A7032**: Cushion for use on nasal mask interface, replacement only, each - **A7033**: Pillow for use on nasal cannula type interface, replacement only, pair - **A7031**: Face mask interface, replacement for full face mask, each - **A7028**: Oral cushion for combination oral/nasal mask, replacement only, each - **A7029**: Nasal pillows for combination oral/nasal mask, replacement only, pair - **A7037**: Tubing used with positive airway pressure device - **A4604**: Tubing with integrated heating element for use with positive airway pressure device - **A7038**: Filter, disposable, used with positive airway pressure device - **A7039**: Filter, non-disposable, used with positive airway pressure device - **A7046**: Water chamber for humidifier, used with positive airway pressure device, replacement, each

Frequently asked questions

HCPCS code A7034 is for a nasal interface (mask or cannula type) used with a positive airway pressure device, with or without a head strap. It is typically billed every 3 months or 90 days. This code applies to breathing aid supplies for conditions like sleep apnea.

Yes, Medicare covers HCPCS code A7034 for a nasal interface (mask or cannula type) used with a positive airway pressure device, whether or not it has a head strap. It is included as a necessary durable medical equipment supply for qualifying patients with conditions such as sleep apnea.

The HCPCS codes for CPAP and related supplies fall within the A7030–A7039 range. However, the actual CPAP device itself is billed under E0601 (Continuous Positive Airway Pressure (CPAP) device), while A7030–A7039 describe accessories and supplies used with the device (e.g., masks, cushions, tubing, filters).