# Medicare On Main — llms.txt > Medicare On Main is a licensed independent Medicare insurance agency serving Colorado's Western Slope and Southeast Utah — with offices in Grand Junction, CO (Mesa County), Moab, UT (Grand County), and Monticello, UT (San Juan County). Advisor Brian Penner helps Medicare-eligible residents compare and enroll in Medicare Advantage (Part C), Medicare Supplement (Medigap), and Part D plans. Guidance is free to clients, with no pressure. County health figures are from CDC PLACES (2023); plan specifics should be confirmed on Medicare.gov. ## Key pages - [Home](https://medicareonmain.com/) - [Medicare 101 — parts explained](https://medicareonmain.com/medicare-101) - [Medicare Advantage plans](https://medicareonmain.com/medicare-advantage-plans) - [Offices & areas we serve](https://medicareonmain.com/locations) - [Grand Junction, CO (Mesa County) Medicare plans — local CDC health data](https://medicareonmain.com/grand-junction-medicare-plans) - [Moab, UT (Grand County) Medicare plans](https://medicareonmain.com/moab-medicare-plans) - [Monticello, UT (San Juan County) Medicare plans](https://medicareonmain.com/monticello-medicare-plans) - [Free tools & plan finder](https://medicareonmain.com/free-tools) - [Blog index](https://medicareonmain.com/blog) - [Blog: Turning 65 in Grand Junction, CO 2026 — Medicare roadmap (7-month IEP window, the 4 parts, Advantage vs. Medigap, Mesa County CDC health data)](https://medicareonmain.com/blog/turning-65-grand-junction-2026) - [About](https://medicareonmain.com/about) - [Contact / book a free consultation](https://medicareonmain.com/contact) ## Tools (agent-callable) - [WebMCP manifest](https://medicareonmain.com/.well-known/mcp.json): callable tools + endpoint. - [MCP endpoint](https://medicareonmain.com/mcp): JSON-RPC 2.0 (initialize, tools/list, tools/call). - `medicare_search_plans`: find & rank Medicare Advantage plans by ZIP (premium, star rating, drug deductible, max out-of-pocket). - `medicare_compare_plans`: compare 2–5 plans by ContractPlanID. ## Data - County health figures: CDC PLACES, 2023 — via the Medicare On Main Data Desk. - For plan specifics (counts, premiums, carriers, star ratings), see the official Medicare Plan Compare tool: https://www.medicare.gov/plan-compare - Estimates and education only; verify with a licensed agent before enrolling. Not affiliated with the U.S. government.