{"npi":"1740324888","type":"NPI-1","status":"active","name":{"display":"Matthew Antczak","other":[],"first":"MATTHEW","last":"ANTCZAK","middle":"TODD"},"specialty":{"primary_taxonomy":"111N00000X","primary_taxonomy_description":"Chiropractor","slug":"chiropractor","schema_org_specialty":null,"all":[{"code":"111N00000X","description":"Chiropractor","primary":true,"state":"IL","license":"038-007424"}]},"addresses":[{"purpose":"LOCATION","street_1":"669 E CALHOUN ST","city":"WOODSTOCK","state":"IL","postal_code":"600984262","country_code":"US","phone":"8153348334"},{"purpose":"MAILING","street_1":"669 E CALHOUN ST","city":"WOODSTOCK","state":"IL","postal_code":"600984262","country_code":"US","phone":"8153348334"}],"license":{"state":"IL","number":"038-007424"},"identifiers":[{"type_code":"01","label":"Other","value":"05606277","state":"IL","issuer":"BLUE CROSS BLUE SHIELD"}],"pecos":{"enrolled_at":"2026-05-09T10:41:39.028268+00:00","enrollments":[{"enrlmt_id":"I20080502000082","type_code":"14-35","type_desc":"PRACTITIONER - CHIROPRACTIC","state":"IL","pac_id":"7810076841"}]},"enumeration_date":"2007-02-19","last_updated":"2008-04-29","_meta":{"source":"NPPES","snapshot_date":"2008-04-29","doc_url":"https://findmynpi.com/api"}}