{"npi":"1508362518","type":"NPI-1","status":"active","name":{"display":"Derik Neilson D.O.","other":[],"first":"DERIK","last":"NEILSON","credential":"D.O."},"specialty":{"primary_taxonomy":"207L00000X","primary_taxonomy_description":"Anesthesiology","slug":"anesthesiology","schema_org_specialty":"Anesthesia","all":[{"code":"207L00000X","description":"Anesthesiology","primary":true,"state":"MT","license":"110697"}]},"addresses":[{"purpose":"LOCATION","street_1":"1101 26TH ST S","city":"GREAT FALLS","state":"MT","postal_code":"594055161","country_code":"US","phone":"4067318888","fax":"4067318318"},{"purpose":"MAILING","street_1":"29578 MORNING VIEW LN","city":"BIGFORK","state":"MT","postal_code":"599115816","country_code":"US","phone":"4062501881"}],"license":{"state":"MT","number":"110697"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20220503000481","type_code":"14-05","type_desc":"PRACTITIONER - ANESTHESIOLOGY","state":"MT","pac_id":"7214285808"}]},"enumeration_date":"2018-03-30","last_updated":"2024-04-08","_meta":{"source":"NPPES","snapshot_date":"2024-04-08","doc_url":"https://findmynpi.com/api"}}