mmpc - National Indian Health Board

Analysis Groups
IHS AIAN
Methods
The linkage of IHS registry and Medicaid data files in 2011 resulted in three groups of Medicaid
enrollees who obtain services from IHS programs (‘IHS AIAN’), two of which had Medicaid claims
from Indian health program providers for IHS ‘covered’ services in 2006, and a third group of which
did not:
1. Medicaid Recipients with IHS Program Claims who are IHS Active Users
IHS AIAN in Group 1 are Medicaid enrollees with Medicaid claims from IHS or Tribal Indian (I/T)
healthcare providers in the state who have designated by the state/tribe/Indian provider as AIAN
whose Medicaid IHS Program claims for IHS ‘covered’ services are eligible for 100% matching funds
from the federal Medicaid program (100% FMAP).
IHS AIAN in Group 1 were found to be defined by the IHS as AIAN ‘Active Users’ in their data registry
system. These IHS Active Users have had a medical or dental visit from an Indian healthcare
provider within a period of three years. A ‘2006 IHS AIAN Active User’ had at least one visit to an
IHS, tribal or Urban Indian health program service provider between October 1, 2004 and
September 30, 2006.
Table 1. Analysis groups resulting from linkage of Indian Health Service (IHS) and Medicaid (MAX) data sources.
Analysis Groups Includes Definition
IHS AIAN
Other AIAN
Whites, Non-Hispanic
1. Medicaid
‘IHS Program’ Recipients
& IHS ‘Active Users’
2. Medicaid
‘IHS Program’ Recipients
3. IHS ‘Active Users’ who are
Medicaid Recipients
Medicaid
‘Racial AIAN’ Recipients not
included in the IHS AIAN
subgroups
Medicaid
‘Racial White Recipients
without Hispanic Ethnicity’
4
Medicaid Enrollees who meet both the
definition of IHS Program Recipients &
IHS Active Users in a given year
Medicaid Enrollees with
at least one paid claim
for an ‘IHS Program’ provided service
IHS Active Users had at least one medical
service from an IHS system provider in 3
years according to IHS, but there is no
Medicaid paid claim for an ‘IHS Program’
provided service in the year of analysis
Race code in the data is ‘AIAN’ either as
the only Race, or in addition to any other
Races, regardless of Hispanic Ethnicity
Race code in the data is ‘White’ as the
only Race, with no Hispanic Ethnicity