{"npi":"1780765719","type":"NPI-1","status":"active","name":{"display":"Dr. Derek Matheson DO","other":[],"first":"DEREK","last":"MATHESON","middle":"M","credential":"DO"},"specialty":{"primary_taxonomy":"207R00000X","primary_taxonomy_description":"Internal Medicine","slug":"internal-medicine","schema_org_specialty":"Internal","all":[{"code":"207R00000X","description":"Internal Medicine","primary":true,"state":"OK","license":"4359"}]},"addresses":[{"purpose":"LOCATION","street_1":"11402 N 135TH EAST AVE","city":"OWASSO","state":"OK","postal_code":"740555701","country_code":"US","phone":"9183311089","fax":"9183311823"},{"purpose":"MAILING","street_1":"11402 N 135TH EAST AVE","city":"OWASSO","state":"OK","postal_code":"740555701","country_code":"US","phone":"9182127373","fax":"9185506689"}],"license":{"state":"OK","number":"4359"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20110128001014","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"OK","pac_id":"2668651118"},{"enrlmt_id":"I20220221001457","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"TX","pac_id":"2668651118"}]},"enumeration_date":"2006-10-17","last_updated":"2025-09-22","_meta":{"source":"NPPES","snapshot_date":"2025-09-22","doc_url":"https://findmynpi.com/api"}}