{"npi":"1114985504","type":"NPI-1","status":"active","name":{"display":"Dr. Ronald Hayes MD","other":[],"first":"RONALD","last":"HAYES","credential":"MD"},"specialty":{"primary_taxonomy":"207L00000X","primary_taxonomy_description":"Anesthesiology","slug":"anesthesiology","schema_org_specialty":"Anesthesia","all":[{"code":"207L00000X","description":"Anesthesiology","primary":true,"state":"IL","license":"336-044899"}]},"addresses":[{"purpose":"LOCATION","street_1":"333 MADISON ST","city":"JOLIET","state":"IL","postal_code":"604358200","country_code":"US","phone":"8157256331","fax":"8157254709"},{"purpose":"MAILING","street_1":"333 MADISON ST","city":"JOLIET","state":"IL","postal_code":"604358200","country_code":"US","phone":"8157256331","fax":"8157254709"}],"license":{"state":"IL","number":"336-044899"},"identifiers":[{"type_code":"05","label":"Medicaid","value":"036082619","state":"IL","issuer":null}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20041028000027","type_code":"14-05","type_desc":"PRACTITIONER - ANESTHESIOLOGY","state":"IL","pac_id":"7911995766"},{"enrlmt_id":"I20080416000049","type_code":"14-05","type_desc":"PRACTITIONER - ANESTHESIOLOGY","state":"IN","pac_id":"7911995766"},{"enrlmt_id":"I20190919000819","type_code":"14-05","type_desc":"PRACTITIONER - ANESTHESIOLOGY","state":"FL","pac_id":"7911995766"},{"enrlmt_id":"I20230725002801","type_code":"14-05","type_desc":"PRACTITIONER - ANESTHESIOLOGY","state":"GA","pac_id":"7911995766"}]},"enumeration_date":"2006-05-03","last_updated":"2015-08-04","_meta":{"source":"NPPES","snapshot_date":"2015-08-04","doc_url":"https://findmynpi.com/api"}}