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When you incur high medical care costs

The copayment for medical care costs you can be required to pay is capped. If your copayment calculated based on a certain standards exceeds this maximum, the excess amount will be paid as “High-Cost Medical Care Benefits”.
Since the Health Insurance Society automatically calculates these benefits together with its additional benefits (Patient Cost-Sharing Reimbursements and Additional Benefits), no special application is required.
Payment of High-Cost Medical Care Benefits and additional benefits is remitted through your employer.

High-Cost Medical Care Benefits (for dependents, “Dependents' High-Cost Medical Care Benefits”)


If the copayment amount for medical care costs paid at the reception desk of the hospital becomes high, the Health Insurance Society will pay the amount beyond a certain figure later (the Cost-Sharing Maximum Amount) to help ease the burden of medical care costs. This is referred to as “High-Cost Medical Care Benefits” (for dependents, “Dependents' High-Cost Medical Care Benefits”).

High-Cost Medical Care Benefits are calculated for medical care costs incurred over a one-month period, from the first through the last day of the month. High-Cost Medical Care Benefits are also calculated on a per-person, per-hospital (outpatient/inpatient, medical/dental, etc.) basis.

If you want to make sure the amount you pay at the reception desk of the hospital will not exceed the Cost-Sharing Maximum Amounts

If a person less than 70 years of age expects to incur high medical care costs, it can be more convenient to obtain “a Certificate of Application of Maximum Copayment Amount” in advance. By showing this “Certificate of Application of Maximum Copayment Amount” to the medical care institution together with your health insurance card, you can ensure that the amount of medical care costs for which the hospital bills you (per month) will not exceed the Cost-Sharing Maximum Amount and reduce the amount of medical care costs you must pay at the hospital on any single visit (You can use this certificate for both inpatient and outpatient care).

Prior application required

“The Certificate of Application of Maximum Copayment Amount” is used to confirm your income category. You must apply to the Health Insurance Society in advance for this Certificate.

How High-Cost Medical Care Benefits are calculated

If your copayment is reduced still further

You can combine copayments for an entire household (Total High-cost Medical Care Benefits)

Even when the copayment for one case for one month is less than the maximum, if members of the same household have made copayments of 21,000 yen or more multiple times in the same month, they can combine those amounts for the purposes of the Cost-Sharing Maximum Amount.
If the total amount exceeds the Cost-Sharing Maximum Amount, then the excess amount is paid by the Health Insurance Society as “Total High-cost Medical Care Benefits”.

Using its own independent benefits (additional benefits), the Health Insurance Society can reduce copayments still further (Additional Total High-cost Medical Care Benefits).

If the Health Insurance Society has paid Total High-cost Medical Care Benefits, it later pays the amount of the subject total copayment minus 20,000 yen, as “Additional Total High-cost Medical Care Benefits”. This payment is automatically calculated and made based on “the Rezept (medical cost details)” the hospital sends to the Health Insurance Society. Payments will be made roughly three months after the month in which the medical care was provided.

  • ** Amounts paid as Total High-cost Medical Care Benefits, as well as costs such as meal expenses, accommodation expenses, and premium bed expenses during hospitalization, are not included in the copayment amount for the purposes of this benefit.
  • ** The benefits will not be paid if the calculated amount is less than 1,000 yen. The calculated amount will be rounded down to the nearest 100 yen.
  • ** See “How High-Cost Medical Care Benefits are calculated” for a specific calculation example.

The Cost-Sharing Maximum Amount will be reduced for frequent qualification of expenditures.

If a single household qualifies for High-Cost Medical Care Benefits three or more months in a single year (the most recent 12 months), the Cost-Sharing Maximum Amount will be reduced to the amount of the table below starting with the fourth month.

Standard monthly remuneration Individual cost-sharing maximum amounts
830,000 yen or more 140,100 yen
530,000 yen - 790,000 yen 93,000 yen
280,000 yen - 500,000 yen 44,400 yen
260,000 yen or less 44,400 yen

If you receive medical care for specified diseases and disorders

Patients suffering from haemophilia, AIDS for which they are administered antiviral drugs, or chronic nephritics requiring artificial dialysis for an extended period may be eligible to pay only 10,000 yen/month to the medical care institution if they obtain certification for specified diseases and disorders.
However, if a patient requiring artificial dialysis qualifies as a person with 530,000 yen or more of standard monthly remuneration, his or her copayment will be 20,000 yen/month.
If you are eligible, apply for issue of Certificates Issued for Specific Disease Treatment.

If copayments for medical care and long-term care are high

When people in the same household pay copayments for both medical care and long-term care and the total copayment amount paid by the household over a one-year period (August 1 to July 31 the following year) exceeds the maximum amount below, the excess amount is paid by health insurance and by long-term care insurance as “High Aggregate Cost for Long-term Care Services”.

  • ** The benefit will not be paid when the amount in excess of the maximum is 500 yen or less.
  • ** For persons less than 70 years of age, this applies if each copayment for medical care costs is 21,000 yen or more.

Cost-Sharing Maximum Amount

Classification Under 70 years 70-74 years
830,000 yen or more
of standard monthly remuneration
2,120,000 yen 670,000 yen
530,000 yen - 790,000 yen
of standard monthly remuneration
1,410,000 yen
280,000 yen - 500,000 yen
of standard monthly remuneration
670,000 yen
260,000 yen or less
of standard monthly remuneration
600,000 yen 560,000 yen

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