Healthcare reference data · for humans and agents

Every provider and code, one lookup away

One lookup for every provider and every code — real CMS data, an honest answer, and an API your agents can call in a single line.

Individual Organization

Real data from the CMS NPPES registry & the official ICD-10-CM release. Same lookups available as an API & MCP endpoint.

Live CMS NPPES registry — every US provider

The full official ICD-10-CM code set

Real data or an explicit failure — never fabricated

How it works

From a lookup to a build

The same data, whether you're a human at a desk or an agent mid-task.

1
Look it up
Search any provider by NPI, name or location, or find a diagnosis code by description — free, no account, real CMS data in seconds.
2
Get the full record
Clean, complete detail: a provider's specialty, status and address; a code's chapter, hierarchy and whether it's billable.
3
Build on it
Get an API key and call the exact same lookups from your software or your AI agent — plus batch validation and provider monitoring.

What you get

The reference layer for US healthcare

Look it up, validate it, watch it — for people and agents alike.

NPI provider lookup

Find any US provider by NPI, name, organization, specialty or location — live from the CMS NPPES registry, always current.

ICD-10-CM code search

Search the full official diagnosis code set by description or code. Every result shows its chapter and whether it's billable.

Full hierarchy & taxonomy

Walk the code tree from chapter to category to billable leaf, and map providers to NUCC taxonomy specialties.

Validation & claim scrubbing

Check NPI check digits and ICD-10 codes — format, existence and billable status — one at a time or in a single batched call.

Provider monitoring

Watch a provider's registry record and get alerted the moment their address, status, name or specialty changes.

API & MCP for agents

The exact same lookups as a REST API and a hosted MCP server, so an AI billing or coding agent can call them directly.

For developers & agents

Built to be called by AI agents, not just people

Medical billing, coding and prior-auth are among the first jobs AI agents are being handed — and they all need one thing: real, deterministic healthcare data. Patientary ships every lookup as a public REST API, an OpenAPI manifest and a hosted MCP server, so an agent can resolve an NPI or validate a code for real instead of hallucinating one.

Single-key REST + MCP over the same data the site uses
Batch validate NPIs and codes before a claim goes out

Explore the API & MCP server

patientary api

$ curl patientary.com/api/v1/icd10/E11.9

{
  "code": {
    "code": "E11.9",
    "name": "Type 2 diabetes mellitus
             without complications",
    "chapter": "IV",
    "billable": true
  }
}

Pricing

Free to look up. Paid to build on.

Web lookups are free forever. The paid tiers sell API throughput, batch validation and monitoring.

Free

Look up any provider or code. No card, no catch.

$0forever

Unlimited NPI & ICD-10 web lookups
Full provider & code detail pages
API key with 3,000 calls/mo (10/min)
Single-record lookups & validation

+2 more

Search free

Pro

Scale

For RCM platforms and agent products calling us in production.

$99/mo

Everything in Pro
500,000 API calls/mo included (then metered)
600 req/min burst · batch up to 1,000
Hosted MCP at production quota

+2 more

Get Scale

See full pricing & plan comparison →

FAQ

Common questions

Is the lookup really free?

Yes — searching providers and ICD-10 codes on the web is free and unlimited, no account required. Paid plans add higher API limits, batch validation, crosswalks and provider monitoring; see /pricing.

Where does the data come from?

Provider data is fetched live from the CMS NPPES registry (the official source of every US NPI). ICD-10-CM codes come from the official CMS release; provider specialties from the NUCC taxonomy. See /methodology.

Is the provider data current?

Yes. We don't store a stale copy of the registry — every provider lookup hits NPPES live, so you always see the current record, then it's cached briefly at the edge for speed.

Can an AI agent use Patientary?

That's a primary use case. Every lookup is available as a REST API and a hosted MCP server, with OpenAPI and llms.txt, so an agent doing medical billing, coding or provider directories can call it directly. See /developers.

Is this medical or billing advice?

No. Patientary is an informational reference tool built on public data (CMS NPPES and the official ICD-10-CM release). It is not medical, coding, legal or billing advice, and code assignment is the responsibility of a qualified professional. Always verify against the primary source before you bill or file.

Look up any provider or code right now

Free, no account required — real CMS data in seconds. Get an API key when you're ready to build.

Try a lookup See the API