{"npi":"1760635890","type":"NPI-1","status":"active","name":{"display":"Dr. William Mustain M.D.","other":[],"first":"WILLIAM","last":"MUSTAIN","middle":"CONAN","credential":"M.D."},"specialty":{"primary_taxonomy":"208C00000X","primary_taxonomy_description":"Colon & Rectal Surgery Physician","slug":"colon-rectal-surgery-physician","schema_org_specialty":null,"all":[{"code":"208600000X","description":"Surgery","primary":false,"state":"KY","license":"R1900"},{"code":"208C00000X","description":"Colon & Rectal Surgery Physician","primary":false,"state":"AR","license":"E-9260"},{"code":"208600000X","description":"Surgery","primary":false,"state":"AR","license":"E-9260"},{"code":"208C00000X","description":"Colon & Rectal Surgery Physician","primary":true,"state":"OK","license":"42838"}]},"addresses":[{"purpose":"LOCATION","street_1":"4205 MCAULEY BLVD STE 301","city":"OKLAHOMA CITY","state":"OK","postal_code":"731208347","country_code":"US","phone":"4059365718","fax":"4059365719"},{"purpose":"MAILING","street_1":"4205 MCAULEY BLVD STE 301","city":"OKLAHOMA CITY","state":"OK","postal_code":"731208347","country_code":"US","phone":"4059365718","fax":"4059365719"}],"license":{"state":"OK","number":"42838"},"identifiers":[{"type_code":"01","label":"Other","value":"5ZZ13","state":"AR","issuer":"AR BCBS"},{"type_code":"05","label":"Medicaid","value":"209704001","state":"AR","issuer":null}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20150813009982","type_code":"14-28","type_desc":"PRACTITIONER - COLORECTAL SURGERY (PROCTOLOGY)","state":"AR","pac_id":"6002121555"},{"enrlmt_id":"I20240404003070","type_code":"14-28","type_desc":"PRACTITIONER - COLORECTAL SURGERY (PROCTOLOGY)","state":"OK","pac_id":"6002121555"}]},"enumeration_date":"2008-11-03","last_updated":"2024-03-25","_meta":{"source":"NPPES","snapshot_date":"2024-03-25","doc_url":"https://findmynpi.com/api"}}