The 2025 Ohio Medicaid Assessment Survey (OMAS) is a critical resource for assessing health statuses, health care access and service utilization, and select behavioral risks for Ohioans, with an emphasis on current Medicaid members and adults who are potentially eligible to receive Medicaid insurance. The 2025 OMAS is the 11th iteration of the series and builds upon prior surveys to identify trend changes for Ohio's Medicaid, Medicaid-eligible, and non-Medicaid populations. It is a cross-sectional random probability survey of non-institutionalized Ohio adults ages 19 years and older and proxy interviews of children ages 18 years and younger.
The 2025 OMAS is an Ohio Medicaid Technical Assistance and Policy Program (MedTAPP) project funded by the Ohio Department of Medicaid (ODM). The OMAS survey vendor is RTI International, a non-profit organization that provides research and technical services.
Survey Data
The 2025 OMAS public use dataset and documentation will be available for download below. This public use dataset will contain data collected from the adult and child questionnaires, except for select variables relating to the administration of data collection.
The 2025 OMAS survey is currently fielding. Stay tuned for data!
2025 Public Use Datasets
- R - coming soon!
- SAS - coming soon!
- Stata - coming soon!
2025 OMAS Analytical Codebook
- 2025 Codebook - coming soon!
- 2025 Contents Listing - coming soon!
2025 Questionnaire
- Paper Survey Instrument - coming soon!
- Web, Telephone, and Paper Survey Specifications - coming soon!
2025 County-Level Small Area Estimation Maps & Tables
For select variables, to increase the precision of key outcomes from OMAS at the county level, a small area estimation (SAE) methodology will be implemented-- these variables were selected by the sponsoring agency and the OMAS Executive Committee.
- 2025 OMAS SAE Methods Report - coming soon!
- 2025 Adult (19-64) County-Level SAE - coming soon!
- 2025 Child (0-18) County-Level SAE - coming soon!
Design and Methods
Coming soon!
2025 Methodology Report
- 2025 OMAS Methodology Report - coming soon!
OMAS County Types
OMAS assigns counties to one of four mutually exclusive county types—rural Appalachian, rural non-Appalachian, metropolitan, and suburban. OMAS defines these county types in accordance with federal definitions as follows: (1) Appalachia is defined using the Appalachian Regional Commission (ARC) standard; (2) Metropolitan is defined using US Census Bureau definitions incorporating urban areas and urban cluster parameters; (3) rural is defined by the Federal Office of Rural Health Policy at the Health Resources and Services Administration (HRSA), excluding Appalachian counties; and (4) suburban is defined by the US Census Bureau and is characterized as a mixed-use or predominantly residential area within commuting distance of a city or metropolitan area.
These designations were originally set by the Ohio Department of Health in 1997 for the 1998 Ohio Family Health Survey (OFHS) and were slightly adjusted in 2004 and again adjusted in 2010 to include Ashtabula and Trumbull counties as Appalachian, in accordance with a federal re-designation. Guidance for these categories was provided by the National Research Council's Committee on Population and Demography staff - for original designations and revisions.
2025 Estimation Guidelines
Proper estimation of the 2025 OMAS data must account for its complex survey design and consider the correct analytic weights. Analysts should use the final adjusted survey weights for analyses of the adult or child (aged 18 or younger) population of Ohio residents. The adult adjusted survey weight (WT_A) is based on the combined ABS and Medicaid frame samples. As only ABS members were invited to complete the child section, the child adjusted survey weight (WT_C) is based only on the ABS frame sample.
For guidance on the use of the analytic weights and example analyses in select statistical software, please see Appendix K of the 2025 Methodology Report - coming soon!.
Findings Report
Coming soon!
Please continue to check back regularly as we post these chartbooks.