Is there any survey question "PMVCAID" comes from? I haven't found anything on it in CPS or other documentation.

The variable has sparse documentation, but appears to have several discrete levels, and is the same among the entire serial (neither or which is mentioned in the documentation).

I’d like to know how it is generated: is it a survey question? Somethign IPUMS/MPC comes up with?

Any light anyone could shed would be appreciated!

The IPUMS-CPS variable PMVCAID is part of a set of non-cash benefits values and after tax values variables calculated by the Census Bureau. According to Technical Paper 52 (page IX), these values were primarily generated by, “dividing the total medical benefits paid by the program by the number of persons covered.” As you can read in the paper they categorized people by risk.

I hope this helps.