# 健康保険法施行令 / Order for Enforcement of the Health Insurance Act — 第五十一条 (Article 51) This is the Markdown twin of https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp. - Law: 健康保険法施行令 (Order for Enforcement of the Health Insurance Act), 大正十五年勅令第二百四十三号 - English title "Order for Enforcement of the Health Insurance Act": claude-opus-5-5 - Kind: ImperialOrder — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第五十一条 (Article 51)（前納保険料の還付） — address `art-51` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51 - e-Gov law ID: 215IO0000000243 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page. - Every provision below carries its address and its URL on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第五十一条（前納保険料の還付） — Refund of Premiums Paid in Advance caption: machine translation, not official art-51 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51 **第一項** 法第百六十五条第一項の規定により保険料を前納した後、前納に係る期間の経過前において任意継続被保険者がその資格を喪失した場合においては、その者（法第三十八条第二号に該当するに至った場合においては、その者の相続人）の請求に基づき、前納した保険料のうち未経過期間に係るものを還付する。 art-51/par-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51/par-1 Where an insured person with optional and continued coverage loses that status before the period covered by advance payment elapses, after paying premiums in advance pursuant to Article 165, paragraph (1) of the Act, the portion of the premiums paid in advance that relates to the unelapsed period is to be refunded upon the request of that person (where the person has come to fall under Article 38, item (ii) of the Act, the heir of that person). machine translation, not official **第二項** 前項に規定する未経過期間に係る還付額は、任意継続被保険者の資格を喪失した時において当該未経過期間につき保険料を前納するものとした場合におけるその前納すべき額に相当する額とする。 art-51/par-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51/par-2 The refund amount relating to the unelapsed period prescribed in the preceding paragraph is the amount equivalent to the amount that would be payable if the premiums for that unelapsed period were to be paid in advance at the time of losing status as an insured person with optional and continued coverage. machine translation, not official --- ## Cites - art-51/par-1: 法第百六十五条第一項 → 健康保険法 第百六十五条第一項 (Article 165, paragraph (1)), art-165/par-1 — https://japanlaw.org/ja/health-insurance-act/art-165/par-1 (e-Gov law ID 211AC0000000070) - art-51/par-1: 法第三十八条第二号 → 健康保険法 第三十八条第一項第二号 (Article 38, paragraph (1), item (ii)), art-38/par-1/item-2 — https://japanlaw.org/ja/health-insurance-act/art-38/par-1/item-2 (e-Gov law ID 211AC0000000070) - art-51/par-2: 前項 → 健康保険法施行令 第五十一条第一項 (Article 51, paragraph (1)), art-51/par-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51/par-1 ## Cited by 3 provisions cite this one. No official source publishes this direction. - 健康保険法施行令 第五十一条第二項（前納保険料の還付） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-51/par-2 - 健康保険法施行令 第五十二条第一項（準用） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-52/par-1 - 健康保険法施行令 第五十三条第一項（厚生労働省令への委任） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-53/par-1 --- ## Sources - claude-opus-5-5 — English title of a law in this collection, written for this site, written 2026-11-06 - e-Gov 法令検索, Digital Agency (デジタル庁) — 健康保険法施行令 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/215IO0000000243/20261001_508CO0000000276), retrieved 2026-11-06 - claude-sonnet-5-5 — Machine translation, batch health-insurance-act-enforcement-order-20261106T164949-017, translated 2026-11-08 - claude-sonnet-5-5, corrected on review by claude-opus-5-5 — Machine translation corrected on review, batch health-insurance-act-enforcement-order-20261106T164949-017, translated 2026-11-08 - This site's parser, version 229 — 健康保険法施行令 — structure, counts, cross-references and defined terms, computed 2026-11-06