Non-taxable caregiver income reported on a W-2 line 12a for 2024 (SOLVED)

My son is a designated caregiver for his disabled adult daughter.  They are in the same household so payments are non-taxable.  For the first time he received W-2 for 2024.  He has received this benefit for years, but has never before received a W-2.  All entries on the W-2 show $0 except for a single entry on line 12a.  When I use the pulldown choices for line 12 none of the options seems to fit.   Any suggestions?  Thanks in advance.

Solved:  The correct pulldown choice for line 12 is 11- Medicaid waiver.  Seems odd, but that's it.