{
  "npi": "1659358166",
  "enumeration_type": "NPI-1",
  "basic": {
    "credential": "MD",
    "enumeration_date": "2005-12-27",
    "first_name": "SEFIK",
    "last_name": "ABDULHAYOGLU",
    "last_updated": "2026-07-13",
    "name_prefix": "Dr.",
    "name_suffix": "--",
    "sex": "M",
    "sole_proprietor": "NO",
    "status": "A"
  },
  "addresses": [
    {
      "address_1": "11 LONGBOW CIR",
      "address_purpose": "MAILING",
      "address_type": "DOM",
      "city": "LYNNFIELD",
      "country_code": "US",
      "country_name": "United States",
      "fax_number": "508-993-8715",
      "postal_code": "019401430",
      "state": "MA",
      "telephone_number": "508-984-1940"
    },
    {
      "address_1": "383 WASHINGTON AVE",
      "address_purpose": "LOCATION",
      "address_type": "DOM",
      "city": "CHELSEA",
      "country_code": "US",
      "country_name": "United States",
      "fax_number": "508-993-8715",
      "postal_code": "021503601",
      "state": "MA",
      "telephone_number": "618-884-3385"
    }
  ],
  "taxonomies": [
    {
      "code": "207R00000X",
      "desc": "Internal Medicine",
      "license": "34674",
      "primary": true,
      "state": "MA",
      "taxonomy_group": ""
    }
  ],
  "compliance": {
    "oig_leie_exclusion": {
      "excluded": false,
      "status": "CLEAR",
      "matches": [],
      "totalDbRecords": 84224
    },
    "cms_pecos_eligibility": {
      "note": "Not listed in CMS Order & Referring PECOS file or institutional NPI-2"
    }
  },
  "medicare_utilization": null,
  "enrichment": {
    "plain_english_specialty": "Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician)",
    "certifying_board": "American Board of Internal Medicine (ABIM)",
    "cms_medicare_crosswalk": [
      {
        "medicare_code": "11",
        "medicare_type": "Physician/Internal Medicine"
      }
    ]
  }
}