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Top MA Enrollment Contracts in Chicago-Naperville-Schaumburg, IL (Jul 2026)
This page summarizes county-level Medicare Advantage enrollment by contract in this metro area.
Home / Data Tools / MA Enrollment / MA MSA Rankings / Chicago-Naperville-Schaumburg, IL
MSA rank: 4 of top 50 by MA enrollment. CBSA: 16984. MSA total enrollment: 551,991.
Data source: SCC Enrollment MA Alternative File (2026-07).
Top 10 Contracts
| Rank | Contract ID | Organization Name | Plan Type | Enrolled | Counties | MSA Share |
|---|---|---|---|---|---|---|
| 1 | H1468 | HUMANA BENEFIT PLAN OF ILLINOIS, INC. | HMO/HMOPOS | 103,414 | 4 | 18.7% |
| 2 | H5216 | HUMANA INSURANCE COMPANY | Local PPO | 56,226 | 5 | 10.2% |
| 3 | H5522 | AETNA LIFE INSURANCE COMPANY | Local PPO | 54,885 | 5 | 9.9% |
| 4 | H2001 | SIERRA HEALTH AND LIFE INSURANCE COMPANY, INC. | Local PPO | 48,552 | 5 | 8.8% |
| 5 | H7617 | EMPHESYS INSURANCE COMPANY | Local PPO | 35,529 | 5 | 6.4% |
| 6 | H5521 | AETNA LIFE INSURANCE COMPANY | Local PPO | 31,683 | 5 | 5.7% |
| 7 | H8768 | CARE IMPROVEMENT PLUS SOUTH CENTRAL INSURANCE CO. | Local PPO | 29,032 | 5 | 5.3% |
| 8 | H2802 | UNITEDHEALTHCARE OF THE MIDLANDS, INC. | HMO/HMOPOS | 24,817 | 5 | 4.5% |
| 9 | H4329 | HUMANA BENEFIT PLAN OF ILLINOIS, INC. | HMO/HMOPOS | 16,142 | 5 | 2.9% |
| 10 | H4624 | ZING HEALTH OF MICHIGAN, INC. | HMO/HMOPOS | 15,235 | 4 | 2.8% |
Method note: Enrollment is based on legal state/county of residence for payment purposes and may include out-of-service-area beneficiaries.
Related Links
- Previous MSA: Houston-Pasadena-The Woodlands, TX
- Next MSA: Riverside-San Bernardino-Ontario, CA
- All top 50 MSA pages
- MA Enrollment search tool
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