{"npi":"1790797322","type":"NPI-1","status":"active","name":{"display":"Mark Kostin M.D","other":[],"first":"MARK","last":"KOSTIN","credential":"M.D"},"specialty":{"primary_taxonomy":"207R00000X","primary_taxonomy_description":"Internal Medicine","slug":"internal-medicine","schema_org_specialty":"Internal","all":[{"code":"207R00000X","description":"Internal Medicine","primary":true,"state":"NY","license":"209566"}]},"addresses":[{"purpose":"LOCATION","street_1":"1655 E 13TH ST","city":"BROOKLYN","state":"NY","postal_code":"112291101","country_code":"US","phone":"7183393100","fax":"7183393905"},{"purpose":"MAILING","street_1":"200 W 58TH ST","city":"NEW YORK","state":"NY","postal_code":"100191432","country_code":"US","phone":"2123071151","fax":"2123070759"}],"license":{"state":"NY","number":"209566"},"identifiers":[{"type_code":"05","label":"Medicaid","value":"01902345","state":"NY","issuer":null}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20040929000324","type_code":"14-11","type_desc":"PRACTITIONER - INTERNAL MEDICINE","state":"NY","pac_id":"7719956457"}]},"enumeration_date":"2006-08-12","last_updated":"2007-07-08","_meta":{"source":"NPPES","snapshot_date":"2007-07-08","doc_url":"https://findmynpi.com/api"}}