G0333 HCPCS code: Pharmacy dispensing fee for inhalation drug(s); initial 30-day supply as a beneficiary

G0333 is the HCPCS Level II code for pharmacy dispensing fee for inhalation drug(s); initial 30-day supply as a beneficiary. In 2024 Medicare paid an average of $41.85 per service for G0333 across 76,902 services. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met. The NCCI unit limit is 1 per day on DME suppliers. Medicare volume fell 18% from 2022 to 2024 (93,907 to 76,902 services). In 2024, 14,337 suppliers billed Medicare for G0333 (purchases), serving 76,877 beneficiaries; California, Florida, New York accounted for 24% of services.

Code details

Who bills G0333 (2024)

Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.

Medicare utilization for G0333, 2022–2024

States with the most G0333 services (2024)

NCCI unit limits (MUE)

Medicare policy articles for this code

• A52466: Nebulizers - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance

Covered diagnoses (215 ICD-10-CM codes)

The diagnoses most often listed as covered in the policy articles above:

Showing 10 of 215. The full list, non-covered diagnoses and CSV export are in Caduvo.

What changed for G0333

• 2006-01-01: G0333 added to HCPCS Level II
• Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01

Frequently asked questions

What is HCPCS code G0333?

G0333 is the HCPCS Level II code for pharmacy dispensing fee for inhalation drug(s); initial 30-day supply as a beneficiary. Short descriptor: "Dispense fee initial 30 day".

How much does Medicare pay for G0333?

In 2024, the average Medicare payment was $41.85 per service (average allowed $57.00).

Does Medicare cover G0333?

Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.

Which diagnoses support coverage for G0333?

Medicare policy articles that cite G0333 list 215 covered ICD-10-CM diagnosis codes across 1 article. The most cited include A15.0 (Tuberculosis of lung), A22.1 (Pulmonary anthrax), A37.01 (Whooping cough due to Bordetella pertussis with pneumonia). A listed diagnosis is necessary but not sufficient; the policy's other criteria still apply.

How many units of G0333 can be billed per day?

1 on DME suppliers (NCCI medically unlikely edits).

Related G03 codes

• G0300 — Direct skilled nursing services of a licensed practical nurse (lpn) in the home health or hospice setting, each 15 minutes
• G0302 — Pre-operative pulmonary surgery services for preparation for lvrs, complete course of services, to include a minimum of 16 days of services
• G0303 — Pre-operative pulmonary surgery services for preparation for lvrs, 10 to 15 days of services
• G0304 — Pre-operative pulmonary surgery services for preparation for lvrs, 1 to 9 days of services
• G0305 — Post-discharge pulmonary surgery services after lvrs, minimum of 6 days of services
• G0306 — Complete cbc, automated (hgb, hct, rbc, wbc, without platelet count) and automated wbc differential count
• G0307 — Complete (cbc), automated (hgb, hct, rbc, wbc; without platelet count)
• G0308 — Creation of subcutaneous pocket with insertion of 180 day implantable interstitial glucose sensor, including system activation and patient training
• G0309 — Removal of implantable interstitial glucose sensor with creation of subcutaneous pocket at different anatomic site and insertion of new 180 day implantable sensor, including system activation
• G0310 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service, 5 to 15 mins time (this code is used for medicaid billing purposes)
• G0311 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service, 16-30 mins time (this code is used for medicaid billing purposes)
• G0312 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service for ages under 21, 5 to 15 mins time (this code is used for medicaid billing purposes)

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Next steps

• Run a reimbursement report for a device billed under G0333
• Watch G0333 for fee, coverage and descriptor changes
• Build a full Medicare revenue model for G0333

Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.

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