# CMS NPPES NPI Registry Provider Search

> CMS NPPES NPI Registry Provider Search is a paid API for AI agents from api.healthtravel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Searches the CMS NPPES NPI Registry by provider name, returning NPI number, credentials, status, taxonomy/specialty, and practice location for up to 10 matching providers.

## Facts

- Endpoint: GET https://api.healthtravel-api.workers.dev/api/health/npi-provider-registry?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cms-nppes-npi-registry-provider-search-167dafea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iRFA6NFkYGbSW0XwbofnK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability cms-nppes-npi-registry-provider-search-167dafea
```

Example prompt: Can you look up the NPI number and specialty for a provider with the last name 'Johnson' and first name 'Michael' in Texas? Show me up to 5 results.

## When to prefer this

Use this endpoint when you need to look up a US healthcare provider's NPI number, verify their credentials and active status, or retrieve their specialty taxonomy and practice location from the official CMS NPPES database. Prefer this over general web search when you need structured, authoritative registry data for billing, credentialing, or compliance purposes.

## Known failure modes

- No results returned if last name is too short (under 2 characters) or contains invalid characters
- Fuzzy matching may return unrelated providers with similar names
- Up to 10 records cap may miss the target if many providers share a last name
- Invalid state code returns no results or an error
- Registry may have stale or incomplete data for some providers

## How this service works

CMS NPPES NPI Registry search: NPI number, name, credential, status, taxonomy (specialty code and description) and practice location. Matches can be fuzzy; the registry decides the match. Up to 10 records per call.

## Output

Returns up to 10 matching provider records from the CMS NPPES registry, each including: NPI number, provider full name, credential(s), active/inactive status, taxonomy code and specialty description, and practice location address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "last_name"
     ],
     "properties": {
      "max": {
       "type": "string",
       "description": "How many records, 1 to 10 (default 5)"
      },
      "state": {
       "type": "string",
       "description": "Two-letter US state code, optional"
      },
      "last_name": {
       "type": "string",
       "description": "Provider last name, letters, spaces, apostrophes and hyphens, 2 to 60 characters"
      },
      "first_name": {
       "type": "string",
       "description": "Provider first name, optional"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cms-nppes-npi-registry-provider-search-167dafea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.healthtravel-api.workers.dev](https://www.zero.xyz/host/api.healthtravel-api.workers.dev/llms.txt)