{
 "id": "cms:175d576d-0568-4ac2-aec5-d77f3ee02205",
 "slug": "ambulatory-specialty-model-participants",
 "source": "data.cms.gov",
 "title": "Ambulatory Specialty Model Participants",
 "summary": "The Ambulatory Specialty Model (ASM) Participants dataset contains information on clinicians that are required to participate in ASM, including their names, National Provider Identifiers (NPI), organization name, their...",
 "description": "The Ambulatory Specialty Model (ASM) Participants dataset contains information on clinicians that are required to participate in ASM, including their names, National Provider Identifiers (NPI), organization name, their cohort, the ASM performance years for which they must meet ASM's requirements, and additional descriptors.",
 "aliases": [],
 "keywords": [
  "Medicare",
  "Hospitals & Facilities",
  "Outpatient Facilities",
  "Chronic Conditions",
  "Value-Based Care",
  "Service Delivery Models"
 ],
 "themes": [
  "Medicare"
 ],
 "topics": [
  "hospitals",
  "quality",
  "aco-value-based"
 ],
 "category": "cms-innovation-center-programs",
 "publisher": "Office of Enterprise Data and Analytics (OEDA)",
 "contact": "AmbulatorySpecialtyModel@cms.hhs.gov",
 "landing_url": "https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/ambulatory-specialty-model-participants",
 "csv_url": "https://data.cms.gov/sites/default/files/2026-10/cde1ab3e-b573-4b39-b5d5-fe54168d620a/202609017_Revised_Master_Final_Participant_List_Public_CY27.csv",
 "api_url": "https://data.cms.gov/data-api/v1/dataset/175d576d-0568-4ac2-aec5-d77f3ee02205/data",
 "api_kind": "cms-data-api",
 "preview_url": "https://data.cms.gov/data-api/v1/dataset/175d576d-0568-4ac2-aec5-d77f3ee02205/data?size=10",
 "dictionary_url": "https://data.cms.gov/resources/ambulatory-specialty-model-participants-data-dictionary",
 "dictionary_kind": "page",
 "methodology_urls": [
  "https://data.cms.gov/resources/ambulatory-specialty-model-participants-methodology"
 ],
 "state_column": "ASM_CY27_SERVICE_LOCATION_STATE",
 "row_count": 5556,
 "posted": "2026-10-05",
 "modified": "2026-10-05",
 "period_start": "2026-01-01",
 "period_end": "2026-12-31",
 "latest_period": "2026-01-01 to 2026-12-31",
 "cadence": "annually",
 "next_update": null,
 "versions": [
  {
   "label": "2026-01-03",
   "uuid": "175d576d-0568-4ac2-aec5-d77f3ee02205",
   "posted": "2026-10-05",
   "period_start": "2026-01-01",
   "period_end": "2026-12-31"
  }
 ],
 "columns": [
  {
   "name": "NPI",
   "label": "NPI",
   "type": "string",
   "meaning": "Numeric field indicating the National Provider Identifier (NPI) of the ASM participant.",
   "source": "cms-dictionary"
  },
  {
   "name": "FIRST_NAME",
   "label": "NPI First Name",
   "type": "string",
   "meaning": "Plain text field containing the first name of the ASM participant.",
   "source": "cms-dictionary"
  },
  {
   "name": "MIDDLE_NAME",
   "label": "NPI Middle Name",
   "type": "string",
   "meaning": "Plain text field containing the middle name of the ASM participant.",
   "source": "cms-dictionary"
  },
  {
   "name": "LAST_NAME",
   "label": "NPI Last Name",
   "type": "string",
   "meaning": "Plain text field containing the last name of the ASM participant.",
   "source": "cms-dictionary"
  },
  {
   "name": "ORGANIZATION_LEGAL_NAME",
   "label": "Organization Name",
   "type": "string",
   "meaning": "Plain text field containing the organization name associated with the ASM participant.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_COHORT",
   "label": "Cohort",
   "type": "string",
   "meaning": "Plain text field containing the name of the ASM participant's cohort, either heart failure or low back pain.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_PARTICIPANT",
   "label": "CY2027 Performance Year",
   "type": "string",
   "meaning": "Plain text field where a \"Yes\" or \"No\" indicates whether the NPI must meet ASM's requirements for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_CBSA_CODE",
   "label": "CY 2027 CBSA/Metropolitan Division Code",
   "type": "number",
   "meaning": "Numeric field indicating the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_CBSA_NAME",
   "label": "CY 2027 CBSA/Metropolitan Division Name",
   "type": "string",
   "meaning": "Plain text field containing the name of the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_SERVICE_LOCATION_STATE",
   "label": "CY 2027 Service Location State",
   "type": "string",
   "meaning": "Plain text field containing the two-letter state abbreviation of the state in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_SPECIALTY",
   "label": "CY2027 Specialty Type",
   "type": "string",
   "meaning": "Plain text field that indicates the specialty type of the ASM participant determined by CMS for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY27_SMALL_PRACTICE",
   "label": "CY2027 Small Practice",
   "type": "string",
   "meaning": "Plain text field that indicates with a \"Yes\" or \"No\" whether the NPI is part of a small practice (15 or fewer clinicians within the NPI's associated Taxpayer Identification Number [TIN]) for the 2027 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_PARTICIPANT",
   "label": "CY2028 Performance Year",
   "type": "string",
   "meaning": "Plain text field where a \"Yes\" or \"No\" indicates whether the NPI must meet ASM's requirements for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_CBSA_CODE",
   "label": "CY 2028 CBSA/Metropolitan Division Code",
   "type": "number",
   "meaning": "Numeric field indicating the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_CBSA_NAME",
   "label": "CY 2028 CBSA/Metropolitan Division Name",
   "type": "string",
   "meaning": "Plain text field containing the name of the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_SERVICE_LOCATION_STATE",
   "label": "CY 2028 Service Location State",
   "type": "string",
   "meaning": "Plain text field containing the two-letter state abbreviation of the state in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_SPECIALTY",
   "label": "CY2028 Specialty Type",
   "type": "string",
   "meaning": "Plain text field that indicates the specialty type of the ASM participant determined by CMS for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY28_SMALL_PRACTICE",
   "label": "CY2028 Small Practice",
   "type": "string",
   "meaning": "Plain text field that indicates with a \"Yes\" or \"No\" whether the NPI is part of a small practice (15 or fewer clinicians within the NPI's associated Taxpayer Identification Number [TIN]) for the 2028 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_PARTICIPANT",
   "label": "CY2029 Performance Year",
   "type": "string",
   "meaning": "Plain text field where a \"Yes\" or \"No\" indicates whether the NPI must meet ASM's requirements for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_CBSA_CODE",
   "label": "CY 2029 CBSA/Metropolitan Division Code",
   "type": "number",
   "meaning": "Numeric field indicating the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_CBSA_NAME",
   "label": "CY 2029 CBSA/Metropolitan Division Name",
   "type": "string",
   "meaning": "Plain text field containing the name of the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_SERVICE_LOCATION_STATE",
   "label": "CY 2029 Service Location State",
   "type": "string",
   "meaning": "Plain text field containing the two-letter state abbreviation of the state in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_SPECIALTY",
   "label": "CY2029 Specialty Type",
   "type": "string",
   "meaning": "Plain text field that indicates the specialty type of the ASM participant determined by CMS for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY29_SMALL_PRACTICE",
   "label": "CY2029 Small Practice",
   "type": "string",
   "meaning": "Plain text field that indicates with a \"Yes\" or \"No\" whether the NPI is part of a small practice (15 or fewer clinicians within the NPI's associated Taxpayer Identification Number [TIN]) for the 2029 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_PARTICIPANT",
   "label": "CY2030 Performance Year",
   "type": "string",
   "meaning": "Plain text field where a \"Yes\" or \"No\" indicates whether the NPI must meet ASM's requirements for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_CBSA_CODE",
   "label": "CY 2030 CBSA/Metropolitan Division Code",
   "type": "number",
   "meaning": "Numeric field indicating the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_CBSA_NAME",
   "label": "CY 2030 CBSA/Metropolitan Division Name",
   "type": "string",
   "meaning": "Plain text field containing the name of the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_SERVICE_LOCATION_STATE",
   "label": "CY 2030 Service Location State",
   "type": "string",
   "meaning": "Plain text field containing the two-letter state abbreviation of the state in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_SPECIALTY",
   "label": "CY2030 Specialty Type",
   "type": "string",
   "meaning": "Plain text field that indicates the specialty type of the ASM participant determined by CMS for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY30_SMALL_PRACTICE",
   "label": "CY2030 Small Practice",
   "type": "string",
   "meaning": "Plain text field that indicates with a \"Yes\" or \"No\" whether the NPI is part of a small practice (15 or fewer clinicians within the NPI's associated Taxpayer Identification Number [TIN]) for the 2030 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_PARTICIPANT",
   "label": "CY2031 Performance Year",
   "type": "string",
   "meaning": "Plain text field where a \"Yes\" or \"No\" indicates whether the NPI must meet ASM's requirements for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_CBSA_CODE",
   "label": "CY 2031 CBSA/Metropolitan Division Code",
   "type": "number",
   "meaning": "Numeric field indicating the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_CBSA_NAME",
   "label": "CY 2031 CBSA/Metropolitan Division Name",
   "type": "string",
   "meaning": "Plain text field containing the name of the Core-based Statistical Area (CBSA) or Metropolitan Division code in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_SERVICE_LOCATION_STATE",
   "label": "CY 2031 Service Location State",
   "type": "string",
   "meaning": "Plain text field containing the two-letter state abbreviation of the state in which CMS determines the ASM participant's service location for purposes of determining eligibility for ASM for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_SPECIALTY",
   "label": "CY2031 Specialty Type",
   "type": "string",
   "meaning": "Plain text field that indicates the specialty type of the ASM participant determined by CMS for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  },
  {
   "name": "ASM_CY31_SMALL_PRACTICE",
   "label": "CY2031 Small Practice",
   "type": "string",
   "meaning": "Plain text field that indicates with a \"Yes\" or \"No\" whether the NPI is part of a small practice (15 or fewer clinicians within the NPI's associated Taxpayer Identification Number [TIN]) for the 2031 ASM performance year.",
   "source": "cms-dictionary"
  }
 ],
 "caveats": [],
 "curated": false,
 "license": "https://www.usa.gov/government-works",
 "detail_key": "175d576d-0568-4ac2-aec5-d77f3ee02205|2026-10-05",
 "checked": "2026-10-25",
 "source_name": "data.cms.gov"
}