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

CMS CY2026 Medicare Advantage and Part D plans available in Santa Clara, 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:

- **46 Medicare plans are available in Santa Clara, 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 Santa Clara, California range from $0.00/mo to $204.00/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 42 of 46 Medicare plans in Santa Clara, California (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 Santa Clara, California (the epistemic boundary)** — INTERPRETATION · Coverage Atlas framing (over the CMS facts above) (https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-plans/ca/santa-clara)

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

**Medicare plans in Santa Clara, California (CY2026) — all RECORDED/DETERMINATION** (46): H0504_047 — Blue Shield Inspire (HMO) — MA-PD — HMO — Blue Shield of California — 58 — 4 — 5300 — No; H0523_083 — Aetna Medicare Enhanced (HMO-POS) — MA-PD — HMO-POS — Aetna Medicare — 65 — 3 — 3900 — No; H0524_039 — Kaiser Permanente Sr Adv Enhanced Santa Clara (HMO) — MA-PD — HMO — Kaiser Permanente — 95 — 4.5 — 3900 — No…