# Atlas Commons research objects — Medicare plans in Mariposa, California (CY2026) — context brief

CMS CY2026 Medicare Advantage and Part D plans available in Mariposa, California: 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:

- **9 Medicare plans are available in Mariposa, California 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 Mariposa, California range from $0.00/mo to $89.00/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 8 of 9 Medicare plans in Mariposa, California (CY2026); average overall: 3.8 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 Mariposa, California (the epistemic boundary)** — INTERPRETATION · Coverage Atlas framing (over the CMS facts above) (https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-plans/ca/mariposa)

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

**Medicare plans in Mariposa, California (CY2026) — all RECORDED/DETERMINATION** (9): H0524_038 — Kaiser Permanente Senior Advantage Enhanced Fresno (HMO) — MA-PD — HMO — Kaiser Permanente — 89 — 4.5 — 2900 — No; H0524_046 — Kaiser Permanente Senior Advantage Basic Fresno (HMO) — MA-PD — HMO — Kaiser Permanente — 24 — 4.5 — 4900 — No; H5496_005 — Imperial Senior Value (HMO C-SNP) — SNP — HMO C-SNP — Imperial Health Plan of California, Inc. — 0 — 3.5 — 296 — No…