Skip to main content
POST
Look up the ownership of a US hospital, nursing home, home health agency, hospice, health center or rural health clinic, as reported by the facility to Medicare. facility_type picks the register: each kind of facility is its own dataset at the source. Give the facility enrollment_id, or part of its organization_name (matched as a substring, upper-cased), never both. Returns up to limit facilities, each with its owners: organisations and individuals with their role, share, join date, city and state, and owner-type flags such as holding_company, private_equity_company or reit. Individuals listed are owners, officers, directors or managing employees in that capacity; their street addresses are left out. Owners are sorted by share, highest first. The register is released monthly and release_file_date says which release answered. No match completes with facilities: []. When truncated is true the source page was full and the last facility may be missing owners.

​
Authentication

Requires x402 payment in the payment-signature header.

​
Request Body

​
string
required
Which register to search: each kind of facility is its own dataset at the source. One of hospital, skilled_nursing, home_health, hospice, health_center, rural_health_clinic.
​
string
The facility Medicare enrolment id. Give this or organization_name, never both. An enrolment id is O followed by 14 digits.
​
string
Part of the enrolled organisation legal name; matched as a substring, upper-cased. 3 to 100 characters. Must be well-formed text, without unpaired UTF-16 surrogates.
​
integer
Most facilities to return. From 1 to 10. Defaults to 3.

​
Response (200 OK)

Top-level envelope: success (boolean) and data (object). All fields below are nested under data.
​
string
Durable job ID for audit and lookup
​
string
Job status: completed
​
string
Always company_medicare_ownership
​
object
The answer, described under Result below
​
object
Where the answer came from and when
​
string
The public body the data comes from. Always US Centers for Medicare & Medicaid Services.
​
string
public when the data comes from a public body, commercial otherwise
​
string
When the lookup was made, as an ISO 8601 UTC time
​
string
Date of the monthly register release that answered, read from the release file name.

​
Result

Nested under data.result.
​
string
Facility type.
​
string
Date of the register release that answered, YYYY-MM-DD. null when the source gives no value.
​
boolean
True when the source page was full, so the last facility listed may be missing owners and further facilities were not read.
​
object[]
Facilities.
​
string
Enrollment id.
​
string
Organization name. null when the source gives no value.
​
string
The facility record id at the source. null when the source gives no value.
​
object[]
Owners.
​
string
The owner record id at the source, the same across facilities the owner holds. null when the source gives no value.
​
string
Owner type.
​
string
The organisation name, or the individual first and last name. null when the source gives no value.
​
string
Doing business as. null when the source gives no value.
​
string
The title an individual holds at the facility, as reported. null when the source gives no value.
​
string
The reported relationship, such as a direct or indirect ownership interest, officer, director or managing employee. null when the source gives no value.
​
string
Role code. null when the source gives no value.
​
number
Share held, when the role carries one. null when the source gives no value.
​
string
Date the owner joined, YYYY-MM-DD. null when the source gives no value.
​
string
City. null when the source gives no value.
​
string
State. null when the source gives no value.
​
string[]
Owner types reported as yes, such as holding_company, private_equity_company or reit, plus any other type text.
See Pricing for this tool’s price. A wallet (x402) call receives it in the 402 quote before anything is charged; a call paid from prepaid credits is charged when the API accepts the request and answers 200.

​
Notes

  • Results return inline. The finished job stays available at /v1/requests/{request_id}