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Build a Medicare Part B drug payment lookup with ASP data

Infusion centers, oncology practices and revenue tools need the CMS ASP payment limit for J-codes every quarter. One call gives the limit in effect on a date, its history and the NDCs it covers.
Endpoints
/v1/drugs/asp/{hcpcs}
/v1/drugs/asp
MCP tools
get_medicare_asp
Plan
Runs on the Free plan

How it works

  1. Look up the drug's HCPCS code (or find it from an NDC through CMS's crosswalk).
  2. Read the payment limit in effect on the date of service and its dosage unit.
  3. Multiply by billed units for the expected Medicare allowable.

The code

TypeScript with @healthcare.dev/sdk. Set HDEV_API_KEY to a free key and run it. Every response carries its source, release and license in meta.

TypeScript
import { HealthcareDev } from "@healthcare.dev/sdk";

const hdev = new HealthcareDev();

export async function partBAllowable(hcpcs: string, units: number, date: string) {
  const { data } = await hdev.drugs.asp(hcpcs, { date });
  const limit = data.in_effect;
  if (!limit) return null;
  return {
    drug: data.short_description,
    perUnit: Number(limit.payment_limit),
    dosage: limit.dosage_descriptor,
    quarter: limit.quarter,
    allowable: Number(limit.payment_limit) * units,
  };
}

await partBAllowable("J9271", 20, "2026-10-15");

Or ask your agent

Connect the MCP server and ask in plain language. It calls get_medicare_asp and cites what it found.

Prompt
What's the Medicare Part B payment limit for HCPCS J9271 this quarter, and what dosage does it apply to?

Take it further

  • Search by NDC with GET /v1/drugs/asp?ndc= when you only have the vial's NDC.
  • Show the quarter-over-quarter history to explain reimbursement changes.
  • Check the HCPCS code itself with the code lookup for its status and description.

Reference data only, not medical advice or a coverage determination. Send codes, NDCs and NPIs, never patient information.

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