# Atlas Commons research objects — Medicare plans in Lyon, Iowa (CY2026) — context brief

CMS CY2026 Medicare Advantage and Part D plans available in Lyon, Iowa: plan count (AGGREGATED), premium range (RECORDED from CMS Landscape Files), CMS star ratings (DETERMINATION — CMS-issued institutional quality rating), and epistemic boundary (INTERPRETATION). Premiums are base plan premiums; actual cost depends on Part B premium, IRMAA, and LIS. Star ratings are CMS quality scores. This surface informs; it does not rank or advise. Use medicare.gov/plan-compare to enroll. CC0.

Claims (warrant · source), each re-fetchable to verify:

- **30 Medicare plans are available in Lyon, Iowa for contract year 2026** — DERIVED · CMS CY2026 Medicare Landscape Files (https://www.cms.gov/medicare/health-drug-plans/medicare-advantage/plan-information/plan-information)
- **Monthly premiums for Medicare plans in Lyon, Iowa range from $0.00/mo to $189.00/mo (CY2026)** — RECORDED · CMS CY2026 Medicare Landscape Files (https://www.cms.gov/medicare/health-drug-plans/medicare-advantage/plan-information/plan-information)
- **CMS assigned star ratings to 28 of 30 Medicare plans in Lyon, Iowa (CY2026); average overall: 3.7 stars** — PROJECTED · CMS CY2026 Medicare Landscape Files (https://www.cms.gov/medicare/health-drug-plans/medicare-advantage/plan-information/plan-information)
- **What these Medicare plan figures are — and are NOT — for Lyon, Iowa (the epistemic boundary)** — INTERPRETATION · Coverage Atlas framing (over the CMS facts above) (https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-plans/ia/lyon)

Do not take these on trust — re-fetch each named source. Full structured object: `https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-plans/ia/lyon.jsonld` · anatomy of the research object: see /commons/the-research-object

**Medicare plans in Lyon, Iowa (CY2026) — all RECORDED/DETERMINATION** (30): H0028_053 — Humana Gold Plus H0028-053 (HMO) — MA-PD — HMO — Humana — 0 — 3.5 — 4200 — No; H0169_001 — UHC Dual Complete IA-S001 (HMO-POS D-SNP) — SNP — HMO-POS D-SNP — UnitedHealthcare — 41.5 — 4 — 9250 — No; H0907_001 — Wellpoint Full Dual Advantage (HMO-POS D-SNP) — SNP — HMO-POS D-SNP — Wellpoint — 29 — 3 — 9250 — No…