{
  "artifact": "hccbuddy-fy2026p2-py2026-v28.csv",
  "release_id": "FY2026P2",
  "effective_start": "2026-04-01",
  "effective_end": "2026-09-30",
  "model": "CMS-HCC V28",
  "payment_year": 2026,
  "mapping_vintage": "2026 Final",
  "scope": "Every billable code in the official FY2026 April code list, joined to payable PY2026 V28 mapping rows. No coefficients, enrichment or coding recommendations.",
  "source_notes": [
    "1. If an ICD-10 code includes clinical concepts comparable to two or more ICD-9 codes, it may map to more than one payment HCC or RxHCC. If that occurs, the ICD-10 code will repeat in separate rows for each of the multiple HCCs or RxHCCs, with dashes in the repeating rows for the models in which the ICD-10 code maps only to a single HCC or RxHCC.",
    "2. V28 HCC 223 [Heart Assist Device/Artificial Heart] requires ICD-10 diagnosis codes additional to those shown in the crosswalk. Beneficiaries with any of the six ICD-10 codes shown as mapping to V28 HCC 223 will receive credit for HCC 223 only if they also have an ICD-10 code shown as mapping to HCC 224 [Acute on Chronic Heart Failure], HCC 225 [Acute Heart Failure (Excludes Acute on Chronic)], or HCC 226 [Heart Failure, Except End Stage and Acute]. Beneficiaries with codes for heart transplant status/complications or for end stage heart failure will be assigned to HCC 221 [Heart Transplant Status/Complications] or HCC 222 [End Stage Heart Failure], respectively."
  ],
  "fields": [
    "icd10cm_code",
    "official_description",
    "billable",
    "icd_release",
    "v28_hccs",
    "raw_mapping_status",
    "mapping_condition"
  ],
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  "bytes": 9309656,
  "counts": {
    "rows": 74719,
    "conditional_mapping_codes": 6,
    "mapped_codes": 8016,
    "not_mapped_codes": 66703,
    "source_codes_outside_this_billable_release": [
      "D71",
      "E7253",
      "G35"
    ]
  },
  "source_manifest_sha256": "bf8016577dcebfe19b69d0e00ef508e7645d3c68b502efdc1229445cbe3771b1",
  "sources": [
    {
      "artifact_id": "icd10cm_order_file_2026",
      "url": "https://www.cms.gov/files/zip/april-1-2026-code-descriptions-tabular-order.zip",
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      "bytes": 2242530,
      "effective_start": "2026-04-01",
      "effective_end": "2026-09-30",
      "order_member": "Code Descriptions/icd10cm_order_2026.txt",
      "independent_code_list_member": "Code Descriptions/icd10cm_codes_2026.txt"
    },
    {
      "artifact_id": "cms_hcc_mapping_2026",
      "url": "https://www.cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip",
      "sha256": "9c260b06d0dd280622dff809c9af65d3a3067aba32dc7e4063a20656a031f885",
      "bytes": 1316554,
      "effective_start": "2026-04-01",
      "effective_end": "2026-09-30",
      "hash_applies_to": "extracted CSV member",
      "archive": {
        "member": "2026 Final ICD-10-CM Mappings.csv",
        "sha256": "1143bc102311fa6f9da33ef7c72cb4a34849a4354feb0ef1c745d38c887f23a2",
        "bytes": 706409,
        "url": "https://www.cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip"
      }
    }
  ],
  "publisher": "HCC Buddy",
  "publisher_url": "https://hccbuddy.com/icd10-to-hcc"
}