Drug -> NDC codes (RxNorm) API

Resolves a drug name or RxCUI to its National Drug Codes (NDCs), descending ingredient/brand concepts to their clinical products when needed, and parses each NDC into 5-4-2 segments. Answers 'What NDCs map to atorvastatin?', 'Get NDC codes for an RxCUI'.

Price$0.01per request

MethodPOST

Route/v1/health/clinical-rxnorm-ndc

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache604800s public

healthclinicalrxnormndcdrugnational-drug-codepharmacynlm

API URLhttps://x402.hexl.dev/v1/health/clinical-rxnorm-ndc

Integration docs

Example request

{
  "drug": "atorvastatin",
  "max": 3
}

Example response

{
  "query": "atorvastatin",
  "rxcui": "83367",
  "resolvedFrom": "83367 (via 20 products)",
  "name": "atorvastatin",
  "totalNdcs": 1548,
  "returned": 3,
  "ndcs": [
    {
      "ndc11": "00093505705",
      "formatted": "00093-5057-05"
    },
    {
      "ndc11": "00093505798",
      "formatted": "00093-5057-98"
    },
    {
      "ndc11": "00378395305",
      "formatted": "00378-3953-05"
    }
  ],
  "codingSystem": "RxNorm/NDC",
  "disclaimer": "Informational reference/terminology data only — NOT medical advice. Verify against authoritative sources and a qualified professional before any clinical, billing, or treatment decision."
}

Input schema

{
  "type": "object",
  "required": [
    "drug"
  ],
  "properties": {
    "drug": {
      "type": "string",
      "description": "Drug name or RxCUI"
    },
    "max": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100,
      "default": 25
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}