{"npi":"1912109083","type":"NPI-1","status":"active","name":{"display":"Dr. Matthew Karulf M.D.","other":[],"first":"MATTHEW","last":"KARULF","credential":"M.D."},"specialty":{"primary_taxonomy":"207RP1001X","primary_taxonomy_description":"Pulmonary Disease Physician","slug":"pulmonary-disease-physician","schema_org_specialty":null,"all":[{"code":"207RP1001X","description":"Pulmonary Disease Physician","primary":true,"state":"OR","license":"MD27862"}]},"addresses":[{"purpose":"LOCATION","street_1":"4100 LAKE DR SE","city":"GRAND RAPIDS","state":"MI","postal_code":"495468292","country_code":"US","street_2":"SUITE 200","phone":"6162678244","fax":"6169497272"},{"purpose":"MAILING","street_1":"100 MICHIGAN ST NE","city":"GRAND RAPIDS","state":"MI","postal_code":"495032560","country_code":"US","street_2":"MC845","phone":"6164866795"}],"license":{"state":"OR","number":"MD27862"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20101209000814","type_code":"14-29","type_desc":"PRACTITIONER - PULMONARY DISEASE","state":"MI","pac_id":"3971583634"}]},"enumeration_date":"2007-06-01","last_updated":"2022-07-08","_meta":{"source":"NPPES","snapshot_date":"2022-07-08","doc_url":"https://findmynpi.com/api"}}