# data.cms.gov, free: Company hierarchy API

> Information on all hospital owners.

data.cms.gov's Free plan for the company hierarchy API costs $0.00 per 1,000 companies. We check each provider's docs for 3 fields. data.cms.gov's docs list 1: Parent.
data.cms.gov limits how many calls you get but gives no number.
We haven't run data.cms.gov through [our company hierarchy API benchmark](https://datacircle.dev/best-company-hierarchy-api.txt) yet.
We rank 154 plans for company hierarchy APIs by price. Half the plans cost $13.71 or less per 1,000 companies. This plan and 13 others tie for the lowest price per 1,000 companies of the 154 plans. [71 company hierarchy API plans on our price sheet are free.](https://datacircle.dev/best-company-hierarchy-api.txt) [Charity Commission's free plan](https://datacircle.dev/company-hierarchy-apis/charity-commission/free-register-of-charities-get-linkedcharities-registerednumber-suffix/llms.txt) scores highest of the free plans in our benchmark, at 90.9 out of 100. Charity Commission covers companies in England and Wales only.
[GlobalEntity API's €59 monthly plan](https://datacircle.dev/company-hierarchy-apis/globalentity-api/59-monthly/llms.txt) covers any number of companies in 54 countries only, and costs less up front than CompanyStack's £99 (about $132) monthly plan.
[DiscoLike](https://datacircle.dev/company-hierarchy-apis/discolike/99-monthly/llms.txt), [Bigdata.com](https://datacircle.dev/company-hierarchy-apis/bigdata-com/50-monthly/llms.txt) and [Magellan Data](https://datacircle.dev/company-hierarchy-apis/magellan-data/375-pack-25000-credits-post-v1-corporate-families/llms.txt) are the best company hierarchy API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/company-hierarchy-apis/data-cms-gov/free
- [Company hierarchy API: the best of 100+ providers compared](https://datacircle.dev/best-company-hierarchy-api.txt)
- Get it: https://data.cms.gov/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- Request: `GET https://data.cms.gov/data-api/v1/dataset/029c119f-f79c-49be-9100-344d31d10344/data`
- API key: not needed
- Its API docs: https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-all-owners/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- Sold by: data.cms.gov (https://data.cms.gov?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 33%
- Parent: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Information on all hospital owners.

## Data

- Freshness: 1 month
- Countries: United States
- Full family tree: no
- Keep data: no limit
- Use data: Works of the U.S. Government are in the public domain and you don’t need permission to reuse them, but an attribution to the agency as the source is appreciated. Your materials, however, shouldn’t give the false impression that the government’s endorsing your commercial products or services. [...]

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: filter[ENROLLMENT ID], filter[ASSOCIATE ID], filter[ORGANIZATION NAME], size, offset
- Method: GET
- Path: /dataset/029c119f-f79c-49be-9100-344d31d10344/data

## About the plan

- Plan: Free
- Who can get it: anyone

## The 38 fields the plan's answer can hold

enrollment ID, associate ID, organization name, owner associate ID, owner type, owner role code, owner role, owner association date, owner first name, owner middle name, owner last name, owner title, owner organization name, owner DBA name, owner address line 1, owner address line 2, owner city, owner state, owner ZIP code, percentage ownership, owner created for acquisition, owner corporation, owner LLC, owner medical provider supplier, owner management services company, owner medical staffing company, owner holding company, owner investment firm, owner financial institution, owner consulting firm, owner for profit, owner non profit, owner private equity company, owner REIT, owner chain home office, owner other type, owner other type text, owned by another organization or individual

## data.cms.gov's plans (1)

- [data.cms.gov, free](https://datacircle.dev/company-hierarchy-apis/data-cms-gov/free/llms.txt): $0.00 per 1,000, 33% complete, 1 month

## data.cms.gov's calls for this API (1)

- `GET /dataset/029c119f-f79c-49be-9100-344d31d10344/data`: [data.cms.gov, free](https://datacircle.dev/company-hierarchy-apis/data-cms-gov/free/llms.txt)

## data.cms.gov's APIs (3)

- [data.cms.gov Company hierarchy API pricing, 1 plan](https://datacircle.dev/company-hierarchy-apis/data-cms-gov/free/llms.txt)
- [data.cms.gov Business verification API pricing, 1 plan, GET /dataset/15f64ab4-3172-4a27-b589-ebd67a6d28aa/data](https://datacircle.dev/business-verification-apis/data-cms-gov/free-get-dataset-15f64ab4-3172-4a27-b589-ebd67a6d28aa-data/llms.txt)
- [data.cms.gov Business verification API pricing, 1 plan, GET /dataset/f6f6505c-e8b0-4d57-b258-e2b94133aaf2/data](https://datacircle.dev/business-verification-apis/data-cms-gov/free-get-dataset-f6f6505c-e8b0-4d57-b258-e2b94133aaf2-data/llms.txt)
- [data.cms.gov Business verification API pricing, 1 plan, GET /dataset/2457ea29-fc82-48b0-86ec-3b0755de7515/data](https://datacircle.dev/business-verification-apis/data-cms-gov/free-get-dataset-2457ea29-fc82-48b0-86ec-3b0755de7515-data/llms.txt)
- [data.cms.gov Business verification API pricing, 1 plan, GET /dataset/5f2c306f-3b1c-42cd-b037-187b2ce22126/data](https://datacircle.dev/business-verification-apis/data-cms-gov/free-get-dataset-5f2c306f-3b1c-42cd-b037-187b2ce22126-data/llms.txt)
- [data.cms.gov Company discovery API pricing, 1 plan, GET /dataset/15f64ab4-3172-4a27-b589-ebd67a6d28aa/data](https://datacircle.dev/company-discovery-apis/data-cms-gov/free-get-dataset-15f64ab4-3172-4a27-b589-ebd67a6d28aa-data/llms.txt)
- [data.cms.gov Company discovery API pricing, 1 plan, GET /dataset/f6f6505c-e8b0-4d57-b258-e2b94133aaf2/data](https://datacircle.dev/company-discovery-apis/data-cms-gov/free-get-dataset-f6f6505c-e8b0-4d57-b258-e2b94133aaf2-data/llms.txt)
- [data.cms.gov Company discovery API pricing, 1 plan, GET /dataset/2457ea29-fc82-48b0-86ec-3b0755de7515/data](https://datacircle.dev/company-discovery-apis/data-cms-gov/free-get-dataset-2457ea29-fc82-48b0-86ec-3b0755de7515-data/llms.txt)
- [data.cms.gov Company discovery API pricing, 1 plan, GET /dataset/5f2c306f-3b1c-42cd-b037-187b2ce22126/data](https://datacircle.dev/company-discovery-apis/data-cms-gov/free-get-dataset-5f2c306f-3b1c-42cd-b037-187b2ce22126-data/llms.txt)

## data.cms.gov: company hierarchy API alternatives

[data.cms.gov alternatives: other company hierarchy API providers by price](https://datacircle.dev/data-cms-gov-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 companies. Each plan in the list gives live data or data at most a month old.

- [Charity Commission, free, Register of Charities, GET /linkedcharities/{RegisteredNumber}/{suffix}](https://datacircle.dev/company-hierarchy-apis/charity-commission/free-register-of-charities-get-linkedcharities-registerednumber-suffix/llms.txt): $0.00 per 1,000, 0% complete, live
- [SEC API, free](https://datacircle.dev/company-hierarchy-apis/sec-api/free/llms.txt): $0.00 per 1,000, 67% complete, 1 minute
- [Interzoid, free API key, POST /enrich](https://datacircle.dev/company-hierarchy-apis/interzoid/free-api-key-post-enrich/llms.txt): $0.00 per 1,000, 67% complete, live
- [Origami Entreprises, free](https://datacircle.dev/company-hierarchy-apis/origami-entreprises/free/llms.txt): $0.00 per 1,000, 33% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-09.

- https://data.cms.gov?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://data.cms.gov/about?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://data.cms.gov/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-all-owners/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-hierarchy-api-pricing