Payer Overview

Medical Mutual of Ohio is the #48 largest US A&H payer by reported premium, writing $3.62B in the US market with a US market share of 0.25% across 10 states. The company reports an estimated total membership of 493.7K and operates through 6 affiliated subsidiaries, concentrating most of its activity in a single Midwestern state while maintaining small footprints elsewhere.

The payer's national footprint is focused on the continental United States with no reported US territory or foreign premium. This concentrated premium base and membership profile inform how Medical Mutual of Ohio approaches provider contracting: deep networks and negotiation leverage in core markets, coupled with localized, relationship-driven contracting in peripheral states.

Premium by Scope

Medical Mutual of Ohio's premium footprint is exclusively in the US states and DC scope as reported. The payer writes $3.62B in the US scope, representing 100.00% of its reported premium across the scopes provided. For a provider evaluating this payer, this concentration implies contracting and network strategies should prioritize US state operations, particularly the issuer's primary state-level markets, since there is no material territory or foreign exposure to consider.

Medical Mutual of Ohio's premium is highly concentrated in Ohio, which accounts for the vast majority of writing while the remaining states each represent only small pockets of exposure. The firm's national premium position is therefore driven by a single core market rather than a broadly diversified national book, which means provider contracting leverage will be strongest in Ohio and comparatively limited in peripheral states. For national provider groups, network inclusion and rate negotiations should prioritize Ohio where scale is meaningful; outside Ohio, agreements will likely be negotiated at a local or regional level with limited cross-state leverage.

State-by-State Market Position

Medical Mutual of Ohio shows its strongest presence in the Midwest, led overwhelmingly by Ohio where it holds its top-ranked position. The Southeast and portions of the Upper Midwest contain small footholds (Georgia, South Carolina, North Carolina, Kentucky), but share and premium there are minimal relative to Ohio. The West and Southwest show only token exposure via Arizona.

This geographic distribution suggests multi-state provider groups should treat Medical Mutual of Ohio as a regional partner: concentrated contracting efforts and network design work in Ohio are critical, while in other states negotiations will be more localized and less influential on the payer's overall network strategy. Providers seeking scale with this payer should focus resources on the Ohio market where membership and premium are measured in the hundreds of thousands and billions respectively.

Estimated Member Demographics

Nationally, the largest age bands are 6–18 (78,644 members), 55–64 (72,418 members), and 45–54 (67,691 members), indicating a strong presence among children and pre-retirement adults. Ohio dominates the member count, with nearly all age bands showing significantly higher numbers than other states. The smallest age bands are 65–74 and 75+, reflecting a lower senior population compared to working-age and pediatric groups.

State-level variation is minimal, with Ohio accounting for the vast majority of members in every age band. Other states have much smaller member counts, and no state shows a pronounced skew toward older or younger populations relative to the national profile. This suggests a consistent demographic mix across the payer's footprint, with Ohio as the primary driver of overall member demographics.

Estimated Members by State

The geographic distribution of estimated members for MEDICAL MUT OF OH GRP is highly concentrated in Ohio, which accounts for 486,810 of the estimated 493,748 total members nationally. Other states, such as Indiana (2,083), Arizona (1,921), Michigan (563), North Carolina (587), Georgia (624), South Carolina (409), Kentucky (481), Virginia (235), and West Virginia (34), have much smaller member counts. This concentration aligns closely with the payer's market share and premium volume, with Ohio being the only state where MEDICAL MUT OF OH GRP holds a significant market position.

The alignment between member counts and market share rank is clear: Ohio is the only state with a substantial member base and premium volume, while all other states represent a minor presence. For providers, this means that contracting strategies and care delivery models should be tailored primarily to the Ohio market, with only limited considerations for other states. Multi-state provider groups will find the payer's influence almost entirely localized to Ohio, with negligible impact elsewhere. This geographic concentration simplifies provider engagement and negotiation, focusing efforts where the payer's membership is most significant.