Jefferson County, Colorado: health insurance
What Jefferson County residents should know about Medicare, marketplace plans and Medicaid.
Jefferson County at a glance
| State | Colorado |
|---|---|
| Population (2023 est.) | 576,366 |
| Population rank in Colorado | 4 of 64 |
| Land area | 764 square miles |
| Major cities | Lakewood, Arvada |
Source: U.S. Census Bureau (Population Estimates 2023; Gazetteer 2023).
Medicare plans leaving Jefferson County for 2027
21 Medicare plans from 7 companies are listed in Jefferson County for 2026 but not for 2027, covering at least 2,477 people enrolled in the plans below today.
- SilverScript Choice (PDP) (S5601-054, Aetna (CVS Health))
- HealthSpring Extra Rx (PDP) (S5617-377, Cigna HealthSpring (HCSC))
- HealthSpring Assurance Rx (PDP) (S5617-133, Cigna HealthSpring (HCSC))
| Plan going away | Company | People enrolled (at least) |
|---|---|---|
| UHC Dual Complete CO-S4 (HMO-POS D-SNP) H0624-006 | UnitedHealthcare | 1,109 |
| Aetna Medicare Signature (HMO-POS) H3931-153 | Aetna (CVS Health) | 512 |
| Kaiser Permanente Senior Advantage Choice DM (PPO) H3138-001 | Kaiser Permanente | 200 |
| HealthSpring Preferred (HMO) H0672-024 | Cigna HealthSpring (HCSC) | 149 |
| Humana Full Access H5216-333 (PPO) H5216-333 | Humana | 110 |
| Select Health Medicare + Kroger (HMO) H1994-030 | Intermountain Health Care | 109 |
| Aetna Medicare Signature (HMO-POS) H4711-008 | Aetna (CVS Health) | 82 |
| Aetna Medicare Dual Care (HMO D-SNP) H4711-012 | Aetna (CVS Health) | 62 |
| HumanaChoice H5216-437 (PPO) H5216-437 | Humana | 55 |
| Select Health Medicare Flex (HMO) H1994-031 | Intermountain Health Care | 45 |
| Humana Value Plus H5216-195 (PPO) H5216-195 | Humana | 28 |
| Select Health Medicare Active (HMO) H1994-035 | Intermountain Health Care | 16 |
Show 6 more plans
| Plan going away | Company | People enrolled (at least) |
|---|---|---|
| Aetna Medicare Eagle (HMO-POS) H4711-010 | Aetna (CVS Health) | 10 or fewer |
| Clear Spring Health Balance+ Diabetes & Heart (HMO C-SNP) H6379-002 | Group 1001 | not listed |
| Clear Spring Health BrightPath Advantage (HMO) H6379-001 | Group 1001 | not listed |
| HealthSpring TotalCare (HMO D-SNP) H0672-009 | Cigna HealthSpring (HCSC) | 10 or fewer |
| HealthSpring TotalCare Plus (HMO D-SNP) H0672-010 | Cigna HealthSpring (HCSC) | 10 or fewer |
| HumanaChoice SNP-DE H5216-468 (PPO D-SNP) H5216-468 | Humana | 10 or fewer |
A plan can be listed because it was renumbered or replaced, not only because a company is leaving the county. When the same company keeps other plans there, members are usually moved to a replacement plan. Your plan should send you a notice, and Medicare’s Annual Enrollment Period (October 15 to December 7) is when you can compare and switch. “People enrolled” is the number enrolled in that plan today (CMS hides counts of 10 or fewer). Source: CMS Medicare Advantage and Part D landscape files for 2026 and 2027, and CMS enrollment data from September 2026.
Is your plan on this list? Call 855-367-1095 and we will look at what is available where you live, with no obligation to enroll.
Why your county matters for coverage
In Colorado, the health plans you can choose depend on where you live. Medicare Advantage and Part D plans are offered by service area, usually county by county, and marketplace premiums and carriers are set by area as well. Living in Jefferson County means the options on this page apply to you, and plans in a neighboring county may differ.
- Medicare: Colorado State Health Insurance Assistance Program (SHIP) gives free, unbiased counseling at 303-894-7552. Ask which plans serve Jefferson County specifically.
- Marketplace plans: shop through Connect for Health Colorado; enter your Jefferson County ZIP code to see what is offered.
- Medicaid: apply through Health First Colorado (Department of Health Care Policy and Financing).
Colorado note: Colorado's Medicaid program goes by its own brand name, Health First Colorado, rather than being called Medicaid directly on member-facing materials -- worth knowing since Colorado-specific paperwork and enrollment sites generally lead with that name instead.
Questions about Jefferson County
Are the same Medicare plans offered everywhere in Colorado?
No. Plans are offered by service area. A plan available in one county may not be offered in Jefferson County, so check by county.
Where do Jefferson County residents get free Medicare counseling?
Colorado State Health Insurance Assistance Program (SHIP) (303-894-7552) is Colorado's free SHIP program.
Do I have to enroll if I call?
No. Calling is a conversation about your options, and you are never required to enroll.
Jefferson County residents: call 855-367-1095
Call Lander LLC to go over your options. There is no cost to call or to speak with an agent, and you are never required to enroll in anything.
Call 855-367-1095Other large counties
Reviewed by Richard Lander, licensed insurance agent (NPN 21255551), Lander LLC. Last updated October 3, 2026. This page is educational and is not a quote, an offer of coverage, or legal or tax advice.