{"npi":"1609861665","type":"NPI-1","status":"active","name":{"display":"Dr. Douglas Massop M.D.","other":[],"first":"DOUGLAS","last":"MASSOP","middle":"W","credential":"M.D."},"specialty":{"primary_taxonomy":"2086S0129X","primary_taxonomy_description":"Vascular Surgery Physician","slug":"vascular-surgery-physician","schema_org_specialty":null,"all":[{"code":"2086S0129X","description":"Vascular Surgery Physician","primary":true,"state":"IA","license":"MD-28186"}]},"addresses":[{"purpose":"LOCATION","street_1":"5950 UNIVERSITY AVE","city":"WEST DES MOINES","state":"IA","postal_code":"50266","country_code":"US","street_2":"STE 231","phone":"5158759090","fax":"5158759312"},{"purpose":"MAILING","street_1":"7147 VISTA DR STE 150","city":"WEST DES MOINES","state":"IA","postal_code":"502669313","country_code":"US","phone":"5158759925","fax":"5158759923"}],"license":{"state":"IA","number":"MD-28186"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20100118000069","type_code":"14-77","type_desc":"PRACTITIONER - VASCULAR SURGERY","state":"IA","pac_id":"4183766934"}]},"enumeration_date":"2005-09-15","last_updated":"2018-06-22","_meta":{"source":"NPPES","snapshot_date":"2018-06-22","doc_url":"https://findmynpi.com/api"}}