NHANES (CDC)

aid: nhanes
name: NHANES (CDC)
description: The National Health and Nutrition Examination Survey (NHANES) is a program of the U.S. CDC National Center for
  Health Statistics that combines interviews, health exams and laboratory tests. Public-use microdata are released as SAS
  transport (.xpt) files on wwwn.cdc.gov, while summary prevalence and dietary estimates are published as Socrata datasets
  on data.cdc.gov, callable through the anonymous SODA REST interface.
url: https://artifacts.apis.io/nhanes/apis.yml
x-type: company
x-source: harvest:cuny-nutrition
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (local-v5; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: blocked
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Public Health
- Health Statistics
- Nutrition
- Open Data
- Survey Data
- Government
- CDC
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: ChangeLog
  url: changelog/nhanes-changelog.yml
- type: RateLimits
  url: rate-limits/nhanes-rate-limits.yml
- type: Conventions
  url: conventions/nhanes-conventions.yml
- type: Authentication
  url: authentication/nhanes-authentication.yml
- type: Hosts
  url: hosts/nhanes-hosts.yml
- type: Vendors
  url: vendors/nhanes-vendors.yml
- type: DomainSecurity
  url: security/nhanes-domain-security.yml
- type: Website
  url: https://www.cdc.gov/nchs/nhanes/
- type: Documentation
  url: https://wwwn.cdc.gov/nchs/nhanes/default.aspx
- type: GettingStarted
  url: https://wwwn.cdc.gov/nchs/nhanes/tutorials/default.aspx
- type: FAQ
  url: https://wwwn.cdc.gov/nchs/nhanes/continuousnhanes/faq.aspx
- type: ChangeLog
  url: https://wwwn.cdc.gov/nchs/nhanes/DataReleases/Latest.aspx
- type: Support
  url: https://www.cdc.gov/cdc-info/forms/contact-us.html
- type: TermsOfService
  url: https://www.cdc.gov/nchs/policy/data-user-agreement.html
- type: PrivacyPolicy
  url: https://www.cdc.gov/other/privacy.html
- type: UsageTerms
  url: terms/nhanes-terms-of-service.yml
- type: Eligibility
  url: eligibility/nhanes-eligibility.yml
apis:
- aid: nhanes:nhanes-open-data
  name: NHANES Open Data (SODA)
  description: 'NHANES summary estimates and footnotes published by NCHS as datasets on the CDC open data portal, each readable
    as JSON through the Socrata Open Data API at /resource/{dataset-id}.json. Examples: NHANES Select Chronic Conditions Prevalence
    Estimates (i667-sjhg) and DQS NHANES Footnotes (iqm3-hbev). Individual-level survey microdata is not served here; it is
    released as .xpt files.'
  humanURL: https://data.cdc.gov/d/i667-sjhg
  baseURL: https://data.cdc.gov
  tags:
  - Open Data
  - Health Statistics
  properties:
  - type: APIReference
    url: https://dev.socrata.com/foundry/data.cdc.gov/i667-sjhg
  - type: Documentation
    url: https://wwwn.cdc.gov/nchs/nhanes/default.aspx
x-coverage:
  state: blocked
  reason: bot-challenge
  method: derived
  generated: '2026-10-30'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company's own front door answers a browser with an anti-bot challenge, so nothing behind it is reachable by
    any reader
  evidence:
  - url: https://www.cdc.gov/graphql
    status: 403
  - url: https://www.cdc.gov/mcp
    status: 403
  - url: https://www.cdc.gov/nchs/nhanes/
    status: 403
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 6
  pass: local-v5