Community Health Systems

Community Health Systems (CHS) is a Fortune 500 hospital operator that owns, leases, and operates general acute care hospitals across the United States. In compliance with the CMS Interoperability and Patient Access Final Rule (CMS-9115-F), CHS publishes FHIR R4 healthcare interoperability APIs that allow third-party applications to access patient demographics and clinical data, adjudicated claims and encounters, formulary information, and provider directory data. The APIs use the HL7 FHIR R4 standard and SMART-on-FHIR authorization for patient-scoped access.

Community Health Systems publishes 4 APIs on the APIs.io network, including Claims API, Formulary API, Patient API, and 1 more. Tagged areas include CMS-9115-F, FHIR, Healthcare, Hospitals, and Interoperability.

The Community Health Systems catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Community Health Systems’ developer surface includes authentication and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub

31.5/100 thin ▬ flat Agent 29/100 agent ready Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs

CMS-9115-F FHIR Healthcare Hospitals Interoperability Patient Access Provider Directory SMART on FHIR Fortune 500

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 31.5/100 · thin

Contract Quality 11.7 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 2.2 / 17

Operational Transparency 0.6 / 11

Contract Governance 1.4 / 10

Discoverability 5.8 / 9

Regulatory Posture 6.4 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/community-health-systems: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

Community Health Systems Provider Directory API

FHIR R4 read API exposing provider and pharmacy directory data in compliance with CMS interoperability requirements. Third-party applications can search Practitioner, Organizati...

Community Health Systems Claims API

Adjudicated claims and encounter data

Community Health Systems Formulary API

Formulary and medication data

Community Health Systems Patient API

Patient demographic and clinical data

Community Health Systems Practitioner API

Provider information

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Community Health Systems Patient Access API

OPEN COLLECTION

Community Health Systems Patient Access Claims API

OPEN COLLECTION

Community Health Systems Patient Access Claims Formulary API

OPEN COLLECTION

Community Health Systems Access Claims Patient API

OPEN COLLECTION

Community Health Systems Patient Access Claims Practitioner API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Community Health Systems Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Community Health Systems Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Community Health Systems Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Community Health Systems Context

0 classes · 5 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Community Health Systems API Rules

5 rules · 3 warnings 2 info

SPECTRAL

Community Health Systems API Rules

9 rules · 4 errors 4 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

CHS FHIR Bundle

6 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Community Health Systems Authentication

oauth2 · 1 scheme

SECURITY

Community Health Systems Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Community Health Systems Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Community Health Systems Agentic Access

4 operations

4 operations · 0 acting

AGENTIC

Press 5

Recent news and press coverage referencing this provider.

Press Releases

2026-05-25

Community Health Systems and Denim Health Announce a ...

2026-05-25

CHS migrates to Google Cloud data platform, adopts ...

2026-05-25

Community Health Systems, Inc. Announces Third Quarter ...

2026-05-25

Community Health Systems Completes Data Migration and ...

2026-05-25

Resources

Get Started 1

Portal, sign-up, and the first successful call

PatientPortal

PatientPortal

Documentation 1

Reference material describing how the API behaves

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Spectral

Spectral

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Investors

Investors

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

CMSInteroperability

CMSInteroperability

HL7FHIRR4

HL7FHIRR4

Source (apis.yml)

aid: community-health-systems
url: https://raw.githubusercontent.com/api-evangelist/community-health-systems/refs/heads/main/apis.yml
name: Community Health Systems
tags:
- CMS-9115-F
- FHIR
- Healthcare
- Hospitals
- Interoperability
- Patient Access
- Provider Directory
- SMART on FHIR
- Fortune 500
tags_raw:
- CMS-9115-F
- FHIR
- Healthcare
- Hospitals
- Interoperability
- Patient Access
- Provider Directory
- SMART-on-FHIR
- Fortune 500
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/community-health-systems.png
access: 3rd-Party
kind: company
created: '2026-03-21'
modified: '2026-05-19'
position: Consuming
description: Community Health Systems (CHS) is a Fortune 500 hospital operator that owns, leases, and operates general acute
  care hospitals across the United States. In compliance with the CMS Interoperability and Patient Access Final Rule (CMS-9115-F),
  CHS publishes FHIR R4 healthcare interoperability APIs that allow third-party applications to access patient demographics
  and clinical data, adjudicated claims and encounters, formulary information, and provider directory data. The APIs use the
  HL7 FHIR R4 standard and SMART-on-FHIR authorization for patient-scoped access.
apis:
- aid: community-health-systems:provider-directory-api
  name: Community Health Systems Provider Directory API
  tags:
  - CMS-9115-F
  - FHIR
  - Healthcare
  - Interoperability
  - Provider Directory
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.chs.net/fhir/r4
  humanURL: https://www.chs.net
  properties:
  - url: https://www.chs.net
    type: Documentation
  - url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
    type: CMSFinalRule
  description: FHIR R4 read API exposing provider and pharmacy directory data in compliance with CMS interoperability requirements.
    Third-party applications can search Practitioner, Organization, and Location resources without patient consent (no PHI
    is exposed by these directory endpoints).
  x-features:
  - FHIR R4 Practitioner, Organization, Location resources
  - Public read access (no patient consent required)
  - Search by name, specialty, location
  x-use-cases:
  - Public provider/pharmacy directory lookup
  - Network adequacy and accessibility reporting
  - Care coordination and referral apps
- aid: community-health-systems:community-health-systems-claims-api
  name: Community Health Systems Claims API
  description: Adjudicated claims and encounter data
  humanURL: https://www.chs.net
  baseURL: https://api.chs.net/fhir/r4
  tags:
  - Claims
  properties:
  - type: OpenAPI
    url: openapi/community-health-systems-claims-api-openapi.yml
  - type: Documentation
    url: https://www.chs.net
  - type: CMSFinalRule
    url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
- aid: community-health-systems:community-health-systems-formulary-api
  name: Community Health Systems Formulary API
  description: Formulary and medication data
  humanURL: https://www.chs.net
  baseURL: https://api.chs.net/fhir/r4
  tags:
  - Formulary
  properties:
  - type: OpenAPI
    url: openapi/community-health-systems-formulary-api-openapi.yml
  - type: Documentation
    url: https://www.chs.net
  - type: CMSFinalRule
    url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
- aid: community-health-systems:community-health-systems-patient-api
  name: Community Health Systems Patient API
  description: Patient demographic and clinical data
  humanURL: https://www.chs.net
  baseURL: https://api.chs.net/fhir/r4
  tags:
  - Patient
  properties:
  - type: OpenAPI
    url: openapi/community-health-systems-patient-api-openapi.yml
  - type: Documentation
    url: https://www.chs.net
  - type: CMSFinalRule
    url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
- aid: community-health-systems:community-health-systems-practitioner-api
  name: Community Health Systems Practitioner API
  description: Provider information
  humanURL: https://www.chs.net
  baseURL: https://api.chs.net/fhir/r4
  tags:
  - Practitioner
  properties:
  - type: OpenAPI
    url: openapi/community-health-systems-practitioner-api-openapi.yml
  - type: Documentation
    url: https://www.chs.net
  - type: CMSFinalRule
    url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
common:
- type: CapabilityMap
  url: capabilities/community-health-systems-capability-edges.yml
  name: Community Health Systems Business Capability Map
- type: AgenticAccess
  url: agentic-access/community-health-systems-agentic-access.yml
- type: DomainSecurity
  url: security/community-health-systems-domain-security.yml
- type: Authentication
  url: authentication/community-health-systems-authentication.yml
- type: OAuthScopes
  url: scopes/community-health-systems-scopes.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/community-health-systems
- type: Website
  url: https://www.chs.net
- type: PatientPortal
  url: https://www.chs.net/patients-visitors/
- type: Investors
  url: https://www.chs.net/investors/
- type: PrivacyPolicy
  url: https://www.chs.net/privacy-statement/
- type: CMSInteroperability
  url: https://www.cms.gov/regulations-and-guidance/guidance/interoperability/index
- type: HL7FHIRR4
  url: https://hl7.org/fhir/R4/
- url: json-ld/community-health-systems-context.jsonld
  type: JSONLD
- url: json-schema/chs-fhir-bundle-schema.json
  type: JSONSchema
- url: rules/community-health-systems-rules.yml
  type: Spectral
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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