{"result_count":1,"results":[{"addresses":[{"address_1":"250 N SHADELAND AVE","address_purpose":"MAILING","address_type":"DOM","city":"INDIANAPOLIS","country_code":"US","country_name":"United States","postal_code":"462194959","state":"IN"},{"address_1":"1701 N SENATE BLVD","address_purpose":"LOCATION","address_type":"DOM","city":"INDIANAPOLIS","country_code":"US","country_name":"United States","postal_code":"462021239","state":"IN","telephone_number":"317-962-3256"}],"basic":{"certification_date":"2026-04-02","credential":"MD","enumeration_date":"2006-04-21","first_name":"MARC","last_name":"GERDISCH","last_updated":"2026-04-02","middle_name":"W","name_prefix":"Dr.","sex":"M","sole_proprietor":"NO","status":"A"},"created_epoch":"1145638165000","endpoints":[{"address_1":"1701 N Senate Blvd","address_type":"DOM","affiliation":"N","city":"Indianapolis","contentTypeDescription":"","country_code":"US","country_name":"United States","endpoint":"mgerdisch@direct.iuhealth.org","endpointType":"DIRECT","endpointTypeDescription":"Direct Messaging Address","postal_code":"462021239","state":"IN","use":"DIRECT","useDescription":"Direct"},{"address_1":"2160 S 1st Ave","address_type":"DOM","affiliation":"Y","affiliationName":"LOYOLA UNIVERSITY MEDICAL CENTER","city":"Maywood","contentTypeDescription":"","country_code":"US","country_name":"United States","endpoint":"mgerdisch104570@direct.luhs.org","endpointType":"DIRECT","endpointTypeDescription":"Direct Messaging Address","postal_code":"601533328","state":"IL","useDescription":""},{"address_1":"1205 S Main St Ste 101","address_type":"DOM","affiliation":"N","city":"Crown Point","contentTypeDescription":"","country_code":"US","country_name":"United States","endpoint":"mgerdisch7704@Direct.FranciscanAlliance.org","endpointType":"DIRECT","endpointTypeDescription":"Direct Messaging Address","postal_code":"463073677","state":"IN","use":"DIRECT","useDescription":"Direct"}],"enumeration_type":"NPI-1","identifiers":[{"code":"01","desc":"Other (non-Medicare)","identifier":"202172","issuer":"Urbana/Rockford/Moline","state":null},{"code":"01","desc":"Other (non-Medicare)","identifier":"344390","issuer":"DuPage Group","state":null},{"code":"05","desc":"MEDICAID","identifier":"36079121","issuer":null,"state":"IL"},{"code":"01","desc":"Other (non-Medicare)","identifier":"S26620","issuer":"Cook Group","state":null}],"last_updated_epoch":"1775129192000","number":"1508822255","other_names":[],"practiceLocations":[{"address_1":"8051 S EMERSON AVE STE 365","address_purpose":"LOCATION","address_type":"DOM","city":"INDIANAPOLIS","country_code":"US","country_name":"United States","postal_code":"462370011","state":"IN","telephone_number":"178-512-3313"},{"address_1":"2650 WARRENVILLE RD","address_2":"SUITE 280","address_purpose":"LOCATION","address_type":"DOM","city":"DOWNERS GROVE","country_code":"US","country_name":"United States","fax_number":"630-324-7942","postal_code":"60515","state":"IL","telephone_number":"630-324-7900"}],"taxonomies":[{"code":"208G00000X","desc":"Thoracic Surgery (Cardiothoracic Vascular Surgery)","license":"01048049A","primary":true,"state":"IN","taxonomy_group":""},{"code":"208G00000X","desc":"Thoracic Surgery (Cardiothoracic Vascular Surgery)","license":"036079121","primary":false,"state":"IL","taxonomy_group":""}]}]}