{"npi":"1124477484","type":"NPI-1","status":"active","name":{"display":"Mark Guelzow MD","other":[],"first":"MARK","last":"GUELZOW","middle":"WILLIAM","credential":"MD"},"specialty":{"primary_taxonomy":"207Q00000X","primary_taxonomy_description":"Family Medicine","slug":"family-medicine","schema_org_specialty":"PrimaryCare","all":[{"code":"207Q00000X","description":"Family Medicine","primary":true,"state":"NY","license":"301689"}]},"addresses":[{"purpose":"LOCATION","street_1":"4101 MEDICAL CENTER DR STE 1C","city":"FAYETTEVILLE","state":"NY","postal_code":"130666600","country_code":"US","phone":"3156377878"},{"purpose":"MAILING","street_1":"8 ROWLEY DR","city":"NORTHPORT","state":"NY","postal_code":"117683244","country_code":"US","phone":"5615233216"}],"license":{"state":"NY","number":"301689"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20191220000187","type_code":"14-08","type_desc":"PRACTITIONER - FAMILY PRACTICE","state":"NY","pac_id":"0941634208"}]},"enumeration_date":"2016-06-08","last_updated":"2021-07-03","_meta":{"source":"NPPES","snapshot_date":"2021-07-03","doc_url":"https://findmynpi.com/api"}}