{"npi":"1700812005","type":"NPI-1","status":"active","name":{"display":"Dr. Charles Irwin M.D.","other":[],"first":"CHARLES","last":"IRWIN","middle":"E.","credential":"M.D."},"specialty":{"primary_taxonomy":"208000000X","primary_taxonomy_description":"Pediatrics","slug":"pediatrics","schema_org_specialty":"Pediatric","all":[{"code":"208000000X","description":"Pediatrics","primary":true,"state":"CA","license":"G23139"},{"code":"2080A0000X","description":"Adolescent Medicine","primary":false,"state":"CA","license":"G23139"}]},"addresses":[{"purpose":"LOCATION","street_1":"ACC 400 PARNASSUS AVE. 2ND FL.","city":"SAN FRANCISCO","state":"CA","postal_code":"941430001","country_code":"US","phone":"4153532002","fax":"4153532466"},{"purpose":"MAILING","street_1":"1635 DIVISADERO STREET","city":"SAN FRANCISCO","state":"CA","postal_code":"941430001","country_code":"US","street_2":"SUITE 625, BOX 1821","phone":"4154764029","fax":"4154764150"}],"license":{"state":"CA","number":"G23139"},"identifiers":[{"type_code":"05","label":"Medicaid","value":"00G231390","state":"CA","issuer":null}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20070326000515","type_code":"14-37","type_desc":"PRACTITIONER - PEDIATRIC MEDICINE","state":"CA","pac_id":"8022112317"}]},"enumeration_date":"2006-06-25","last_updated":"2025-09-11","_meta":{"source":"NPPES","snapshot_date":"2025-09-11","doc_url":"https://findmynpi.com/api"}}