{"result_count":1,"results":[{"addresses":[{"address_1":"2311 W 22ND ST","address_2":"SUITE 202","address_purpose":"MAILING","address_type":"DOM","city":"OAK BROOK","country_code":"US","country_name":"United States","fax_number":"630-320-1231","postal_code":"605231225","state":"IL","telephone_number":"630-320-1160"},{"address_1":"2545 S KING DR","address_purpose":"LOCATION","address_type":"DOM","city":"CHICAGO","country_code":"US","country_name":"United States","fax_number":"312-326-2102","postal_code":"606162441","state":"IL","telephone_number":"312-842-7117"}],"basic":{"credential":"M.D.","enumeration_date":"2006-02-23","first_name":"ROBERT","last_name":"ALTER","last_updated":"2025-09-11","middle_name":"ALLAN","name_prefix":"--","name_suffix":"--","sex":"M","sole_proprietor":"NO","status":"A"},"created_epoch":"1140726992000","endpoints":[],"enumeration_type":"NPI-1","identifiers":[],"last_updated_epoch":"1757623214000","number":"1821064585","other_names":[],"practiceLocations":[],"taxonomies":[{"code":"207R00000X","desc":"Internal Medicine","license":"036059069","primary":false,"state":"IL","taxonomy_group":""},{"code":"207RG0300X","desc":"Internal Medicine, Geriatric Medicine","license":"036059069","primary":true,"state":"IL","taxonomy_group":""}]}]}