{"result_count":1,"results":[{"addresses":[{"address_1":"505 S 24TH AVE STE 200","address_purpose":"MAILING","address_type":"DOM","city":"WAUSAU","country_code":"US","country_name":"United States","fax_number":"715-396-3191","postal_code":"544011706","state":"WI","telephone_number":"715-396-3191"},{"address_1":"505 S 24TH AVE STE 200","address_purpose":"LOCATION","address_type":"DOM","city":"WAUSAU","country_code":"US","country_name":"United States","fax_number":"715-396-3191","postal_code":"544011706","state":"WI","telephone_number":"715-396-3191"}],"basic":{"certification_date":"2026-04-17","credential":"M.D.","enumeration_date":"2006-09-22","first_name":"CHRISTOPHER","last_name":"MACKAY","last_updated":"2026-04-17","middle_name":"I.","name_prefix":"Dr.","sex":"M","sole_proprietor":"YES","status":"A"},"created_epoch":"1158941709000","endpoints":[],"enumeration_type":"NPI-1","identifiers":[{"code":"05","desc":"MEDICAID","identifier":"34207900","issuer":null,"state":"WI"}],"last_updated_epoch":"1776427780000","number":"1538269402","other_names":[],"practiceLocations":[{"address_1":"4501 HIGHWAY 66","address_2":"SUITE 200","address_purpose":"LOCATION","address_type":"DOM","city":"STEVENS POINT","country_code":"US","country_name":"United States","fax_number":"715-396-3191","postal_code":"54482","state":"WI","telephone_number":"715-396-3191"}],"taxonomies":[{"code":"207T00000X","desc":"Neurological Surgery","license":"44117","primary":true,"state":"WI","taxonomy_group":""}]}]}