Field help (CTR4AFFMUT) 

Enter or select the complementary health insurance scheme code.

Complementary health insurance scheme codes are stored in the miscellaneous table no. 329 - Complementary welfare scheme. A code corresponds to a number/beneficiary type pair (for example, 1 adult + 1 child).
Beneficiaries are entered in the fields of the Beneficiaries block (number of children, adults or other persons).

The complementary health insurance scheme code is used in the payslip: