{
  "slug": "temporal-staleness",
  "title": "Temporal staleness",
  "hypotheses": [
    "H18"
  ],
  "status": "published",
  "release_date": "2026-04-09",
  "generated_at": "2026-04-21T16:48:20+00:00",
  "methodology_version": "0.1.0-draft",
  "commit_sha": "pending",
  "headline": "100.0% of NPD resources carry a meta.lastUpdated value on the release day (2026-04-09). Distinct meta.lastUpdated values range from 1 to 5 across the 6 resource types \u2014 meta.lastUpdated on the NPD bulk public-use files is a bulk-export stamp, not a per-resource freshness signal.",
  "numerator": 27200471,
  "denominator": 27200569,
  "chart": {
    "type": "bar",
    "unit": "count",
    "data": [
      {
        "label": "practitioner",
        "value": 1
      },
      {
        "label": "organization",
        "value": 5
      },
      {
        "label": "location",
        "value": 1
      },
      {
        "label": "endpoint",
        "value": 1
      },
      {
        "label": "practitioner_role",
        "value": 1
      },
      {
        "label": "organization_affiliation",
        "value": 1
      }
    ]
  },
  "notes": "Per-resource distinct meta.lastUpdated values on release day 2026-04-09: practitioner \u2192 1 distinct, 100.00% at modal; organization \u2192 5 distinct, 55.48% at modal; location \u2192 1 distinct, 100.00% at modal; endpoint \u2192 1 distinct, 100.00% at modal; practitioner_role \u2192 1 distinct, 100.00% at modal; organization_affiliation \u2192 1 distinct, 100.00% at modal. Regulatory compliance with the 30-day CMS-9115-F or 90-day REAL Health Providers Act / No Surprises Act update cadence CANNOT be measured from meta.lastUpdated on the bulk files \u2014 a per-record freshness signal from upstream NPPES (enumeration_date / last_updated) or PECOS would be required."
}