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Medicare Advantage Enrollment Tracker

Medica Medicare Advantage Enrollment

In September 2026, Medica had 268,166 Medicare Advantage members, up 97,588 from September 2025. That is 0.7% of members with a carrier label, 18th among carriers. Its share edged up 0.3 points since September 2025.

Data as ofCMS contract file

  • These totals include employer and union group plans.
    Why this matters

    Carrier shares: all Medicare Advantage contracts, including employer group, from the CMS contract file. Share is of members with a carrier label. This file and the state file give different totals, so these shares do not apply to state or county member counts.

  • Some months are missing from the source.
    Why this matters

    Missing months: July 2023 and December 2023 are absent from the state and county file; July 2023 is absent from the contract file. Lines break at a gap. Nothing is filled or averaged across it. Year-over-year changes compare the same calendar month, so July 2023 and December 2023 cannot be compared.

  • Some contracts have no carrier name.
    Why this matters

    Insurer not assigned in CMS data: 0.6% of members in September 2026 (225,918), against 10.7% in January 2023. These are mostly retired contracts with no carrier label. Shares divide by members with a label so old and new months compare. When the unassigned bucket is above 3% in either month, treat share changes as rough.

  • Shares jump each January. Compare same months.
    Why this matters

    Counts and shares step at each January, when plan-year contracts and annual elections take effect. A 12-month change is mostly one January step plus drift. CMS posts January counts late, so compare November with February or March, not January alone.

By Senior Deal Club Standards Desk. Editorial policy. Methodology. Senior Deal Club is not affiliated with Medicare or any government agency. This page is educational. It counts members. It does not rate plans.

Medica led 2 areas. An area is a state or DC.

Shares are of members whose contract has a carrier label, from the CMS contract file. The file includes employer group plans. Source: CMS, September 2026.

Medica at a glance

Share of labelled members

0.7%

up 0.3 percentage points vs September 2025

September 2026, rank 18 among carriers

Members

268,166

September 2026, contract file

States led

2

Areas where Medica had the most labelled members, September 2026

National share against nearby carriers

Medica and the carriers ranked just above and below it, January 2023 to September 2026.

Medica share of members

Percent of members with a carrier label, monthly

Contract file · September 2026
CMS contract file. Includes employer group plans. Share divides by members with a carrier label.
Medica share of membersLine chart, January 2023 to September 2026. Medica: 0.7% in September 2026. Corewell Health: 0.8% in September 2026. Florida Blue/BCBS: 0.7% in September 2026. Alignment Health: 0.8% in September 2026. Shaded bands mark months with no data.0.2%0.4%0.6%0.8%1%1.2%2023202420252026ABAlignment Health0.8%Corewell Health0.8%Medica0.7%Florida Blue/BCBS0.7%
Medica share of membersLine chart, January 2023 to September 2026. Medica: 0.7% in September 2026. Corewell Health: 0.8% in September 2026. Florida Blue/BCBS: 0.7% in September 2026. Alignment Health: 0.8% in September 2026. Shaded bands mark months with no data.0.2%0.4%0.6%0.8%1%1.2%20232025ABAlignment0.8%Corewell0.8%Medica0.7%Blue Cross0.7%
  • Medica
  • Corewell Health
  • Florida Blue/BCBS
  • Alignment Health
  • Shaded: no data that month
  1. Note A: July 2023: No contract-file data for July 2023.
  2. Note B: January 2026: January step: plan-year contract changes move members between carriers. Shares jump in this month.
View the data table
Medica share of members: values by month
MonthMedicaCorewell HealthFlorida Blue/BCBSAlignment Health
Sep 20260.7%0.8%0.7%0.8%
Aug 20260.7%0.8%0.7%0.8%
Jul 20260.7%0.8%0.7%0.8%
Jun 20260.7%0.8%0.7%0.8%
May 20260.7%0.8%0.7%0.8%
Apr 20260.7%0.8%0.7%0.8%
Mar 20260.7%0.8%0.7%0.8%
Feb 20260.7%0.8%0.7%0.8%
Jan 20260.7%0.8%0.7%0.8%
Dec 20250.5%0.7%0.8%0.7%
Nov 20250.5%0.7%0.8%0.7%
Oct 20250.5%0.7%0.8%0.7%
Sep 20250.5%0.7%0.8%0.7%
Aug 20250.5%0.7%0.8%0.7%
Jul 20250.5%0.7%0.8%0.6%
Jun 20250.5%0.7%0.8%0.6%
May 20250.5%0.7%0.8%0.6%
Apr 20250.5%0.7%0.8%0.6%
Mar 20250.5%0.7%0.8%0.6%
Feb 20250.5%0.7%0.8%0.6%
Jan 20250.5%0.8%0.8%0.6%
Dec 20240.5%0.8%1.0%0.6%
Nov 20240.5%0.8%1.0%0.6%
Oct 20240.5%0.8%1.0%0.6%
Sep 20240.5%0.8%1.0%0.6%
Aug 20240.5%0.8%1.0%0.6%
Jul 20240.5%0.8%1.0%0.5%
Jun 20240.5%0.8%1.0%0.5%
May 20240.5%0.8%1.0%0.5%
Apr 20240.5%0.8%1.0%0.5%
Mar 20240.5%0.8%1.0%0.5%
Feb 20240.5%0.8%1.0%0.5%
Jan 20240.5%0.8%1.0%0.5%
Dec 20230.6%0.8%1.1%0.4%
Nov 20230.6%0.8%1.1%0.4%
Oct 20230.6%0.8%1.1%0.4%
Sep 20230.6%0.8%1.1%0.4%
Aug 20230.6%0.8%1.0%0.4%
Jul 2023––––
Jun 20230.6%0.8%1.1%0.4%
May 20230.6%0.8%1.1%0.4%
Apr 20230.6%0.8%1.1%0.4%
Mar 20230.6%0.8%1.1%0.4%
Feb 20230.6%0.8%1.1%0.3%
Jan 20230.6%0.8%1.1%0.3%

CMS contract file, September 2026. Share of members with a carrier label. Includes employer group plans.

Where Medica has members

States where Medica has 1,000 or more members, largest first. Share is of that state's labelled members in September 2026. Change is in percentage points since September 2025. States where a carrier is small may be missing: the data keeps each state's ten largest carriers and any carrier above 1%. A contract that serves several states carries one carrier label, so a carrier can show members in a state where it is not a local plan.

Leads: South Dakota, North Dakota.

Medica members by state, September 2026
StateMembersShareRankChange since September 2025Note
Minnesota131,29219.1%2up 7.6 percentage points
Wisconsin48,5066.2%5up 0.5 percentage points
South Dakota42,43358.9%1up 17.7 percentage pointsLeads
North Dakota32,78561.2%1up 26.0 percentage pointsLeads
Nebraska12,2809.2%5down 0.5 percentage points

Gained or lost the lead

Leader by labelled members in each state, September 2025 against September 2026.

Medica took the lead from BCBS Michigan in North Dakota (from BCBS Michigan).

Questions about Medica

How many people are in Medica Medicare Advantage plans?

268,166 members in September 2026, from the CMS contract file. The count includes employer group plans and is not limited to plans anyone can buy.

Is Medica gaining or losing Medicare Advantage members?

Its share of labelled members edged up 0.3 points between September 2025 and September 2026, from 0.5% to 0.7%. Members rose from 170,578 to 268,166. The data does not show why.

Where does Medica have the most members?

Minnesota (131,292, 19.1% of that state's labelled members), Wisconsin (48,506, 6.2% of that state's labelled members), and South Dakota (42,433, 58.9% of that state's labelled members) in September 2026.

Does this page show Medica plan prices or benefits?

No. It counts members and shares. For plan details, use the carrier or Medicare.gov. Senior Deal Club is not affiliated with Medicare or any government agency. This page is educational. It counts members. It does not rate plans.

Cite and download

Cite this page

Senior Deal Club Standards Desk. Medica Medicare Advantage Enrollment. Data as of September 2026. Source: CMS Medicare Advantage monthly enrollment, contract file. https://www.seniordealclub.com/medicare-advantage/enrollment/carriers/medica

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