{"id":"m1d2256061eeb3b83","name":"乳幼児・こども医療費助成制度","aka":[],"category":{"slug":"kosodate","name":"子育て・教育"},"provider":{"level":"municipal","name":"各区市町村","municipalities":[{"code":"134023","name":"青ヶ島村"},{"code":"132276","name":"羽村市"},{"code":"133817","name":"三宅村"},{"code":"132144","name":"国分寺市"},{"code":"131113","name":"大田区"},{"code":"131211","name":"足立区"},{"code":"132250","name":"稲城市"},{"code":"131130","name":"渋谷区"},{"code":"131202","name":"練馬区"},{"code":"132110","name":"小平市"},{"code":"134015","name":"八丈町"},{"code":"132217","name":"清瀬市"},{"code":"131148","name":"中野区"},{"code":"133647","name":"神津島村"},{"code":"132098","name":"町田市"},{"code":"134210","name":"小笠原村"},{"code":"132225","name":"東久留米市"},{"code":"131229","name":"葛飾区"},{"code":"131121","name":"世田谷区"},{"code":"131172","name":"北区"},{"code":"132063","name":"府中市"},{"code":"133639","name":"新島村"},{"code":"132136","name":"東村山市"},{"code":"131181","name":"荒川区"},{"code":"132209","name":"東大和市"},{"code":"133621","name":"利島村"},{"code":"131059","name":"文京区"},{"code":"131156","name":"杉並区"},{"code":"132071","name":"昭島市"},{"code":"132101","name":"小金井市"},{"code":"131237","name":"江戸川区"},{"code":"132047","name":"三鷹市"},{"code":"132021","name":"立川市"},{"code":"132284","name":"あきる野市"},{"code":"131164","name":"豊島区"},{"code":"132055","name":"青梅市"},{"code":"132128","name":"日野市"},{"code":"131024","name":"中央区"},{"code":"133825","name":"御蔵島村"},{"code":"133078","name":"檜原村"},{"code":"132012","name":"八王子市"},{"code":"132233","name":"武蔵村山市"},{"code":"132152","name":"国立市"},{"code":"131083","name":"江東区"},{"code":"133035","name":"瑞穂町"},{"code":"132080","name":"調布市"},{"code":"132292","name":"西東京市"},{"code":"131041","name":"新宿区"},{"code":"132187","name":"福生市"},{"code":"133051","name":"日の出町"},{"code":"131032","name":"港区"},{"code":"132039","name":"武蔵野市"},{"code":"133086","name":"奥多摩町"},{"code":"131016","name":"千代田区"},{"code":"132241","name":"多摩市"},{"code":"131105","name":"目黒区"},{"code":"132195","name":"狛江市"},{"code":"131075","name":"墨田区"},{"code":"131067","name":"台東区"},{"code":"131199","name":"板橋区"},{"code":"133612","name":"大島町"},{"code":"131091","name":"品川区"}]},"status":"active","fiscal_year":2026,"audience":"personal","benefit_kind":"subsidy","apply_method":"window","apply_note":null,"eligibility":"当該市区町村に住所を有する、健康保険に加入している子ども（対象年齢は自治体により異なる","amount_unit":null,"amount_period":null,"amount_monthly_equiv":null,"amount_direction":null,"notice_kind":null,"rate_percent":null,"summary":"各区市町村による個人向けの補助金。対象は当該市区町村に住所を有する、健康保険に加入している子ども（対象年齢は自治体により異なる。多くは18歳年度末まで）。窓口申請、転入後速やかに（遡及適用の期限は自治体による）、窓口は各区市町村の子育て支援・医療助成担当課。","fields":{"amount_max":{"status":"not_found","basis":"公式ページで確認（2026-08-20）"},"amount_min":{"status":"not_verified"},"rate_percent":{"status":"not_verified"},"has_income_limit":{"status":"not_found","basis":"公式ページで確認（2026-08-20）"},"age_min":{"status":"not_verified"},"age_max":{"status":"not_found","basis":"公式ページで確認（2026-08-20）"},"deadline":{"value":"転入後速やかに（遡及適用の期限は自治体による）","status":"ok","kind":"text"}},"income_limits":[],"notes":[{"kind":"warning","title":"こども医療証は転出日で即時失効、旧証で受診すると助成額の全額返還","body":"乳幼児・こども医療費助成の医療証は、転出日をもって即時失効する（有効なのは転出日の前日まで）。横浜市・郡山市などの規定では受給資格が転出日の前日までとされ、資格喪失後に旧自治体の医療証を提示して受診すると、後日助成額の全額返還（返納）を求められる。新医療証が交付されるまでの空白期間は、健康保険証（マイナ保険証・資格確認書等）だけを提示して窓口で自己負担分（未就学児2割／小学生以上3割）を一旦支払い、領収書原本を保管して転入先に償還払いを申請する流れになる。新宿区・世田谷区では転入日の翌日から3か月以内に交付申請すれば助成開始日が転入日に遡及するため、この期間内に申請すれば空白期間の自己負担は全額戻る。全市町村一律の遡及申請猶予期間は存在せず、「転入日から14日以内」「当月中」「3か月以内」など条例・規則で差がある点は未確認事項として残っている。引越し当日以降は旧医療証を財布から抜いておくのが実務的な事故防止策。","severity":"high"}],"schedules":[],"editorial":null,"completeness":{"level":"sparse","missing":[],"has_source":false},"usability":{"level":"contactable","who_known":true,"what_known":false,"next_step":"各区市町村の子育て支援・医療助成担当課に問い合わせできます","substitutes":["対象者の説明文","担当窓口"]},"contact":{"department":"各区市町村の子育て支援・医療助成担当課","phone":null},"source":null,"successor":null,"verification":{"verified_at":null,"data_updated_at":"2026-09-04","confidence":"high","verified_fields":1},"index":{"indexable":false,"reasons":["出典URLの到達を確認できていない","確認済み項目が2件未満"]},"slug":"乳幼児こども医療費助成制度"}