Payer Overview

Medical Mutual of Ohio Market Analysis: Market Share and Coverage by State

Medical Mutual of Ohio is a regional health insurer with a concentrated footprint driven by strong presence in its home state and smaller operations across select states. Its market role combines local contracting strength with limited national scale.

Medical Mutual of OhioHealth InsuranceHealthcare MarketProvider ContractingReimbursementOhioIndianaArizonaRegional Payer

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

Scope	Jurisdictions	Premium	Share of Payer Total
US States & DC	10	$3.62B	100.00%
Total	10	$3.62B	100.00%

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.

Subsidiary	Domicile
Medical Health Insuring Corporation of Ohio	OH
Medical Mutual of Ohio	OH
Medmutual Life Insurance Company	OH
Paramount Insurance Company	OH
Reserve National Insurance Company	IL
Superior Dental Care Inc	OH

Subsidiary

Domicile

Medical Health Insuring Corporation of Ohio

Medical Mutual of Ohio

Medmutual Life Insurance Company

Paramount Insurance Company

Reserve National Insurance Company

Superior Dental Care Inc

State	Market Share	Premium Written	Estimated Members
AZ	0.04%	$8.61M	1.92K
GA	0.01%	$3.75M	0.62K
IN	0.04%	$12.97M	2.08K
KY	0.02%	$4.21M	0.48K
MI	0.01%	$3.94M

State

Market Share

Premium Written

Estimated Members

0.04%

$8.61M

1.92K

0.01%

$3.75M

0.62K

0.04%

$12.97M

2.08K

0.02%

$4.21M

0.48K

0.01%

$3.94M

Age Band	Ohio	Indiana	Arizona	Georgia	North Carolina	Michigan	South Carolina	Kentucky	Virginia	West Virginia	National Total
Under 6	29780	129	114	36	33	32	22	28	15	2	30193
6–18	77552

Age Band

Ohio

Indiana

Arizona

Georgia

North Carolina

Michigan

South Carolina

Kentucky

Virginia

West Virginia

National Total

Under 6

29780

129

114

30193

6–18

77552

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.

OpenPayer

Payer Overview

Medical Mutual of Ohio Market Analysis: Market Share and Coverage by State

Payer Overview

Premium by Scope

National Market Presence

Estimated Member Demographics

State-by-State Market Position

Estimated Members by State