Farmer Health Insurance Act Article 37

If the insured person originally has a partial disability and the severity worsens or he/she has suffered from additional disability, the insurer shall re-evaluate the level of the worsened or newly added disability. The payment should also be made based on the new disabled level. However, the highest payment amount should be limited to the first level.In cases of an insured person who originally has a partial disability while his/her insurance is still in effect as mentioned in the preceding Paragraph but has not claimed the disability payment, the insurer shall, based on the level of disability following the increased severity of the disability, calculate and pay out the disability payment based on the standards for disability benefits. However, the highest payment amount should be limited to the first level.
中文原文 農民健康保險條例第37條
被保險人之身體原已局部身心障礙,再因傷害或疾病致身體之同一部位身心障礙程度加重或不同部位發生身心障礙者,保險人應按其加重或新增部分之身心障礙程度,依身心障礙給付標準計算發給身心障礙給付。
但合計最高以第一等級給付之。
前項被保險人在保險有效期間原已局部身心障礙,而未請領身心障礙給付者,保險人應按其加重後之身心障礙程度,依身心障礙給付標準計算發給身心障礙給付。
但合計不得超過第一等級之給付標準。

English translation for reference only; the Chinese text prevails. Not legal advice.