The open reference API for Medicare distribution data.

Every carrier, every plan, every county — normalized, canonical, and free to query.

What's inside

Carrier Registry

Canonical carrier identities: names, aliases, corporate hierarchies, NAIC identifiers, and logos. One stable ID per carrier, curated in the open.

Medicare Advantage data

CMS's plan, enrollment, landscape, and star-ratings files, normalized into one queryable API instead of a pile of zips.

Built to be built on

Free API, monthly refreshes, bulk downloads. Maintained by the teams behind Dinero and InsureTrek.

One canonical answer

GET/v1/carriers/resolve?name=UHC

curl "https://api.openplandata.com/v1/carriers/resolve?name=UHC"

{
  "query": "UHC",
  "match": {
    "id": "unitedhealthcare",
    "canonicalName": "UnitedHealthcare",
    "groupId": "unitedhealthcare",
    "confidence": 0.95
  },
  "alternates": []
}

One canonical answer for every messy carrier name.

Coming soon

Research and analytics built on this data — market-share shifts, plan exits, and enrollment trends.

Trademark disclaimer

Carrier logos, wordmarks, and brand marks served by this API are trademarks of their respective owners, included solely to identify the associated carrier. No affiliation or endorsement is implied. Rights holders may request corrections or removal at legal@openplandata.com.