{"npi":"1689234916","type":"NPI-1","status":"active","name":{"display":"Dr. Gregory Wittenburg MD","other":[{"code":"5","type":"Also known as","value":"WITTENBURG, GREG"}],"first":"GREGORY","last":"WITTENBURG","middle":"MARK","credential":"MD"},"specialty":{"primary_taxonomy":"207Q00000X","primary_taxonomy_description":"Family Medicine","slug":"family-medicine","schema_org_specialty":"PrimaryCare","all":[{"code":"207P00000X","description":"Emergency Medicine","primary":false,"state":"CO","license":"DR.0068880"},{"code":"207Q00000X","description":"Family Medicine","primary":true,"state":"CO","license":"DR.0068880"}]},"addresses":[{"purpose":"LOCATION","street_1":"2500 ALHAMBRA AVE","city":"MARTINEZ","state":"CA","postal_code":"945533156","country_code":"US","phone":"9253705000"},{"purpose":"MAILING","street_1":"2500 ALHAMBRA AVE","city":"MARTINEZ","state":"CA","postal_code":"945533156","country_code":"US","phone":"9253705000"}],"license":{"state":"CO","number":"DR.0068880"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20220526001114","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"CO","pac_id":"0345628707"},{"enrlmt_id":"I20220929001773","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"KS","pac_id":"0345628707"}]},"enumeration_date":"2019-06-18","last_updated":"2022-05-18","_meta":{"source":"NPPES","snapshot_date":"2022-05-18","doc_url":"https://findmynpi.com/api"}}