{"npi":"1811989619","type":"NPI-1","status":"active","name":{"display":"Christian Sieck M.D.","other":[],"first":"CHRISTIAN","last":"SIECK","middle":"C.","credential":"M.D."},"specialty":{"primary_taxonomy":"207Q00000X","primary_taxonomy_description":"Family Medicine","slug":"family-medicine","schema_org_specialty":"PrimaryCare","all":[{"code":"207Q00000X","description":"Family Medicine","primary":true,"state":"OK","license":"19870"}]},"addresses":[{"purpose":"LOCATION","street_1":"950 N PORTER AVE","city":"NORMAN","state":"OK","postal_code":"730716400","country_code":"US","street_2":"SUITE 300","phone":"4053290121","fax":"4052926099"},{"purpose":"MAILING","street_1":"950 N PORTER AVE","city":"NORMAN","state":"OK","postal_code":"730716400","country_code":"US","street_2":"SUITE 300","phone":"4053290121","fax":"4052926099"}],"license":{"state":"OK","number":"19870"},"identifiers":[{"type_code":"01","label":"Other","value":"080128650","state":"OK","issuer":"RAILROAD MEDICARE"},{"type_code":"01","label":"Other","value":"5173636","state":"OK","issuer":"AETNA EDI"},{"type_code":"05","label":"Medicaid","value":"100228010C","state":"OK","issuer":null}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20100823000206","type_code":"14-08","type_desc":"PRACTITIONER - FAMILY PRACTICE","state":"OK","pac_id":"1456380179"}]},"enumeration_date":"2005-08-17","last_updated":"2010-07-14","_meta":{"source":"NPPES","snapshot_date":"2010-07-14","doc_url":"https://findmynpi.com/api"}}