Payer Overview
Health Care Service Corporation Market Analysis: Market Share and Coverage by State
Health Care Service Corporation is a large regional insurer with concentrated leadership in select states and a broad footprint across the continental US. This profile shapes negotiating leverage with providers and strategic network design.
Payer Overview
Health Care Service Corporation Market Analysis: Health Care Service Corporation is the #7 largest US A&H payer by premium and operates across 45 states. Its US premium footprint of $64.1B represents a US market share of 4.46%, and it serves an estimated total membership of 9.13M. The company operates through 9 affiliated subsidiaries and holds #1 market positions in Illinois, Montana, and Oklahoma, reflecting concentrated leadership in those states.
Health Care Service Corporation's US presence spans major Midwestern and Western markets where it holds its strongest positions while also maintaining selective exposure in other regions. This concentrated premium base and membership scale influence national provider contracting dynamics, particularly for multi-state systems negotiating with a payer that combines deep regional dominance with a broad cross-state network.
9 rows
| Subsidiary | Domicile |
|---|---|
| 505 Insurance Company | NM |
| Dearborn Life Insurance Company | IL |
| Dearborn National Life Insurance Company of New York | NY |
| Ghs HMO Inc DBA Bluelincs HMO | OK |
| Ghs Insurance Company | OK |
| Hcsc Insurance Services Company | IL |
| Health Care Services Corporation A Mutual Legal Re | IL |
| Illinois BlueCross BlueShield Insurance Company | IL |
| Texas BlueCross BlueShield Insurance Company | TX |
National Market Presence
| State | Market Share | Premium Written | Estimated Members |
|---|---|---|---|
| AK | 0.32% | $5.80M | 1.61K |
| AL | 0.09% | $632K | 109 |
| AR | 0.51% | $61.3M | 9.58K |
| AZ | 0.02% | $5.19M | 1.16K |
| CO | 0.01% | $2.02M | 411 |
| CT | 0.01% | $1.12M | 218 |
| DE | 0.31% | $10.0M | 2.54K |
| FL | 0.30% | $388M | 44.1K |
| GA | <0.01% | $1.68M | 279 |
| ID | 0.01% | $410K | 88 |
| IL | 39.44% | $24.9B | 3.60M |
| IN | 0.02% | $4.89M | 785 |
| KY | 0.19% | $48.4M | 5.53K |
| LA | 0.01% | $2.49M | 239 |
| MA | <0.01% | $638K | 98 |
| MD | 0.12% | $27.4M | 5.63K |
| ME | 0.01% | $292K | 50 |
| MI | 0.03% | $17.1M | 2.44K |
| MN | 0.31% | $89.3M | 13.9K |
| MO | 0.01% | $2.25M | 362 |
| MT | 41.57% | $1.28B | 330K |
| NC | <0.01% | $1.07M | 162 |
| ND | <0.01% | $80.5K | 16 |
| NE | 0.09% | $7.86M | 1.39K |
| NH | 0.26% | $15.2M | 2.93K |
| NJ | 0.01% | $1.11M | 153 |
| NM | 33.16% | $3.83B | 376K |
| NV | 0.43% | $55.5M | 9.01K |
| OH | <0.01% | $2.61M | 355 |
| OK | 30.17% | $28.5B | 778K |
| OR | 0.01% | $359K | 41 |
| PA | 0.01% | $4.34M | 498 |
| SD | 0.01% | $177K | 43 |
| TN | 0.39% | $124.7M | 18.9K |
| TX | 20.1% | $28.5B | 3.90M |
| UT | 0.45% | $51.4M | 12.6K |
| VA | <0.01% | $1.92M | 295 |
| WA | <0.01% | $101K | 17 |
| WI | 0.02% | $4.58M | 758 |
| WV | 0.01% | $646K | 86 |
| WY | 0.01% | $122K | 35 |
| National Total | — | $64.1B | 9.13M |
Health Care Service Corporation shows strong concentration in a handful of states: Illinois, Montana, New Mexico, Oklahoma, and Texas together account for the vast majority of premium. The company writes $24.9B in Illinois, $1.28B in Montana, $3.83B in New Mexico, $28.5B in Oklahoma, and $28.5B in Texas, creating significant regional hubs of membership and premium. Nationally, this concentration means provider contracting teams should prioritize negotiations in these hubs where the payer can influence referral patterns and network share.
Outside those hubs, the payer maintains smaller footprints across many states, typically under $100M per state. That pattern favors targeted, state-level contracting strategies for provider groups that operate in a limited number of markets, while multi-state systems should focus resources on the dominant states to maximize reimbursement leverage.
State-by-State Market Position
Health Care Service Corporation's strongest presence is in the Mountain West and parts of the Midwest and Southwest. Montana and New Mexico are standout markets where the payer holds #1 positions with market shares of 41.57% and 33.16%, respectively, while Oklahoma and Illinois are also top-ranked with 30.17% and 39.44% respectively. Texas is another major market with a 20.1% share. These top states cluster in the Mountain West and central-southern regions, producing dense regional influence for the payer.
The Northeast and much of the Southeast show minimal presence, with many states reporting market shares below 0.5% and premium under $10M. For multi-state provider groups, this distribution means negotiating leverage will be highly uneven: strong in the payer's core states (where large membership and premium concentration create dependence) and weak in peripheral states. Systems with major operations in Illinois, Montana, New Mexico, Oklahoma, or Texas should prioritize contracting resources there to capture the most impact.
Estimated Member Demographics
HCSC GRP is estimated to cover 8,712,099 members nationally, based on Census and NAIC market share data. The member population spans all age bands, with notable concentrations in both pediatric and working-age adult segments.
| Age Band | Estimated Members |
|---|---|
| Under 6 | 533,752 |
| 6-18 | 1,401,018 |
| 19-25 | 825,469 |
| 26-34 | 1,130,963 |
| 35-44 | 1,308,200 |
| 45-54 | 1,220,483 |
| 55-64 | 1,190,076 |
| 65-74 | 646,492 |
| 75+ | 455,648 |
The largest age bands are 6-18 (1.4M), 35-44 (1.3M), and 45-54 (1.2M), indicating a strong presence among families and working-age adults. Pediatric members (under 18) account for nearly 2 million lives, while seniors (65+) represent over 1.1 million. This diverse age mix suggests HCSC GRP's insured population drives demand for both preventive pediatric care and adult chronic disease management. Providers should expect a broad spectrum of care needs, with significant utilization in primary care, specialty services, and preventive health.
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