COUNTIES WE SERVE Common Ground Healthcare Cooperative proudly serves the 20 counties that make up eastern Wisconsin. BROWN | CALUMET | DOOR | FOND DU LAC | KENOSHA | KEWAUNEE MANITOWOC | MARINETTE | MILWAUKEE | OCONTO | OUTAGAMIE OZAUKEE | RACINE | SHAWANO | SHEBOYGAN | WASHINGTON WAUKESHA | WAUPACA | WAUSHARA | WINNEBAGO