A7021 – Supplies and accessories for lung expansion airway clearance, continuous high frequency oscillation, and nebulization device (e.g., handset, nebulizer kit, biofilter)
HCPCS Level II code · A codes: Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental
HCPCS codeA7021
- Long description
- Supplies and accessories for lung expansion airway clearance, continuous high frequency oscillation, and nebulization device (e.g., handset, nebulizer kit, biofilter)
- Short description
- Suppl and access lung expan
- Pricing indicator
32DME – inexpensive & routinely purchased- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
D1EOther DME- Added
- October 1, 2024
- Last change
- October 1, 2024 – No change
Frequently asked questions
What is HCPCS code A7021?
A7021 is a HCPCS Level II code for supplies and accessories for lung expansion airway clearance, continuous high frequency oscillation, and nebulization device (e.g., handset, nebulizer kit, biofilter).
Does Medicare cover A7021?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby A codes
- A7012 – Water collection device, used with large volume nebulizer
- A7013 – Filter, disposable, used with aerosol compressor or ultrasonic generator
- A7014 – Filter, nondisposable, used with aerosol compressor or ultrasonic generator
- A7015 – Aerosol mask, used with dme nebulizer
- A7016 – Dome and mouthpiece, used with small volume ultrasonic nebulizer
- A7017 – Nebulizer, durable, glass or autoclavable plastic, bottle type, not used with oxygen
- A7018 – Water, distilled, used with large volume nebulizer, 1000 ml
- A7020 – Interface for cough stimulating device, includes all components, replacement only
- A7023 – Mechanical allergen particle barrier/inhalation filter, cream, nasal, topical
- A7025 – High frequency chest wall oscillation system vest, replacement for use with patient owned equipment, each
- A7026 – High frequency chest wall oscillation system hose, replacement for use with patient owned equipment, each
- A7027 – Combination oral/nasal mask, used with continuous positive airway pressure device, each
- A7028 – Oral cushion for combination oral/nasal mask, replacement only, each
- A7029 – Nasal pillows for combination oral/nasal mask, replacement only, pair
- A7030 – Full face mask used with positive airway pressure device, each
- A7031 – Face mask interface, replacement for full face mask, each
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.