Medicaid, Medicaid Expansion CHIP, or Separate CHIP Code - May

SAS Name

A code used to distinguish among Medicaid, Medicaid Expansion, and Separate CHIP populations, in a month. There are separate variables for each of the 12 months during the year.


This is a key variable in identifying commonly analyzed Medicaid and CHIP populations.

SOURCE: T-MSIS Annual Demographic and Eligibility TAF

Code Code value
0 Individual was not Medicaid-eligible and not eligible for separate CHIP for the month
1 Individual was Medicaid-eligible, but was not included in either Medicaid Expansion CHIP or a separate Title XXI CHIP for the month. These include blind and disabled people and low-income families with dependent children.
2 Individual was included in Medicaid Expansion CHIP and subject to enhanced federal matching for the month. States with Medicaid-Expansion programs have built upon existing Medicaid programs to include low-income children whose family incomes are above Medicaid income eligibility thresholds.
3 Individual was not Medicaid Expansion CHIP-eligible, but was included in a separate Title XXI CHIP for the month. States using Separate CHIP have used CHIP funds to create separate programs outside of their Medicaid programs.
4 Individual was both Medicaid-eligible and Separate CHIP eligible during the same month
Null/missing source value is missing or unknown