In IPUMS MEPS, how was the variable OBNPVIS derived? What MEPS variables did you use to make this variable?

I am wondering how the number of office-based visits for Nurse Practitioners was derived since I do not think there is a direct variable measured in MEPS. If there is, what is this variable?

The IPUMS MEPS variable OBNPVIS is based on the MEPS variable “obnurs” which records the number of nurse practitioner office visits. IPUMS MEPS does not do any editing to this variable. That is, the IPUMS variable OBNPVIS is identical to the MEPS variable obnurs.