{"npi":"1669714994","type":"NPI-1","status":"active","name":{"display":"Walter Grenell DO","other":[],"first":"WALTER","last":"GRENELL","credential":"DO"},"specialty":{"primary_taxonomy":"207PE0004X","primary_taxonomy_description":"Emergency Medical Services (Emergency Medicine) Physician","slug":"emergency-medical-services-emergency-medicine-physician","schema_org_specialty":null,"all":[{"code":"207PE0004X","description":"Emergency Medical Services (Emergency Medicine) Physician","primary":false,"state":"AK","license":"200431"},{"code":"207PE0004X","description":"Emergency Medical Services (Emergency Medicine) Physician","primary":true,"state":"CO","license":"0056486"},{"code":"207P00000X","description":"Emergency Medicine","primary":false,"state":"TX","license":"W0917"}]},"addresses":[{"purpose":"LOCATION","street_1":"8300 W 38TH AVE","city":"WHEAT RIDGE","state":"CO","postal_code":"800336005","country_code":"US","phone":"3034254500"},{"purpose":"MAILING","street_1":"8300 W 38TH AVE","city":"WHEAT RIDGE","state":"CO","postal_code":"800336005","country_code":"US","phone":"3034254500"}],"license":{"state":"CO","number":"0056486"},"identifiers":[],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20160822002826","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"CO","pac_id":"9830484476"},{"enrlmt_id":"I20190107000849","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"HI","pac_id":"9830484476"},{"enrlmt_id":"I20230208000641","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"AK","pac_id":"9830484476"},{"enrlmt_id":"I20250919004217","type_code":"14-93","type_desc":"PRACTITIONER - EMERGENCY MEDICINE","state":"TX","pac_id":"9830484476"}]},"enumeration_date":"2013-03-25","last_updated":"2025-09-23","_meta":{"source":"NPPES","snapshot_date":"2025-09-23","doc_url":"https://findmynpi.com/api"}}