Medicare Part B ASP

Each record is one billing code (mostly HCPCS J and Q codes) with:

• the newest quarter's payment_limit per dosage_descriptor unit (generally 106% of the average sales price), coinsurance percentage, CMS's notes, and the vaccine, blood and clotting factor columns where they apply;
• history: every quarter loaded (the newest eight, about two years), newest first, each with effective_from and effective_through;
• ndcs: the products CMS's ASP NDC-HCPCS crosswalk assigns to the code, with package size and billing units per package (to convert a package to billed units), and the quarters each was listed.

?date=YYYY-MM-DD on the lookup returns in_effect, the quarter whose limit applies on that date (default today). CMS posts each quarter's file a few weeks early, so the newest quarter can still be in the future. A code missing from the newest quarter's file stays available with status: retired.

curl "https://api.healthcare.dev/v1/drugs/asp/J9271?date=2026-08-15" \
  -H "Authorization: Bearer $HDEV_API_KEY"

# Which codes is this product billed under?
curl "https://api.healthcare.dev/v1/drugs/asp?ndc=0006-3026-02" \
  -H "Authorization: Bearer $HDEV_API_KEY"

GET /v1/drugs/ndc/{ndc} links to the product's payment limits as links.asp when the crosswalk lists it.

What it is notCopy Anchor Link

• Not a coverage decision: CMS says the presence or absence of a code or limit in its files does not indicate whether Medicare covers a drug.
• Not what a patient pays, and not a retail pharmacy cost (see NADAC for that).
• CPT codes in the files (vaccines and immune globulins, such as 90375) are served as code numbers only, with code_system: cpt and no descriptor: CPT descriptors are copyrighted by the AMA.
• version names the newest quarter and CMS's newest revision of any file loaded, e.g. 2026-10-r20261008.