{"npi":"1730359100","type":"NPI-1","status":"active","name":{"display":"Dr. Joann Chang M.D.","other":[],"first":"JOANN","last":"CHANG","middle":"CONG YIN","credential":"M.D."},"specialty":{"primary_taxonomy":"207W00000X","primary_taxonomy_description":"Ophthalmology Physician","slug":"ophthalmology-physician","schema_org_specialty":null,"all":[{"code":"207W00000X","description":"Ophthalmology Physician","primary":false,"state":"NY","license":"267568"},{"code":"207W00000X","description":"Ophthalmology Physician","primary":true,"state":"MA","license":"243192"}]},"addresses":[{"purpose":"LOCATION","street_1":"479 OLD UNION TPKE","city":"LANCASTER","state":"MA","postal_code":"015233029","country_code":"US","phone":"9785373900","fax":"9785376030"},{"purpose":"MAILING","street_1":"479 OLD UNION TPKE","city":"LANCASTER","state":"MA","postal_code":"015233029","country_code":"US","phone":"9785373900","fax":"9785376030"}],"license":{"state":"MA","number":"243192"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20100715000859","type_code":"14-18","type_desc":"PRACTITIONER - OPHTHALMOLOGY","state":"MA","pac_id":"0345314472"}]},"enumeration_date":"2008-03-02","last_updated":"2022-05-02","_meta":{"source":"NPPES","snapshot_date":"2022-05-02","doc_url":"https://findmynpi.com/api"}}