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PlainMedicare

Plan year 2026 · coverage ends Dec. 31, 2026CMS crosswalk of Oct. 1, 2026

Alignment Health the ONE is not offered under this ID in 2027

H3815Contract034Plan

HMO · served 6 counties in California in 2026

Run by Alignment Health Plan (contract H3815), sold as Alignment Health Plan, owned by Alignment Healthcare USA, LLC

CMS crosswalk: members move into H3815-031 in 1 of its 6 counties; in the others the plan ends

Folds in part

Alignment Health the ONE (H3815-034) is not offered under this ID in 2027. The CMS plan crosswalk of October 1, 2026 moves its members into Central Health Harmony 031 (H3815-031), in the 1 county where that plan is sold (978 members in September 2026). In its other 5 counties (382 members) there is no plan to move into: coverage ends December 31, 2026, and members there need to choose a new plan.

What changes for its members in Central Health Harmony 031?

For members in the 1 county where Central Health Harmony 031 is sold: this plan's 2026 amounts beside Central Health Harmony 031 (H3815-031) in 2027. The changed lines are marked and come first.
What you pay or get20262027Change
Plan nameAlignment Health the ONECentral Health Harmony 031renamed
Emergency room$0 copay$150 copayup $150
Hospital stay, in network$0 a day for days 1–4, then $100 a day for days 5–10, then $0 a day for days 11–90$175 a day for days 1–5, then $0 a day for days 6–90up $775for a 5-day stay
Skilled nursing facility, in network$0 a stay$0 a day for days 1–20, then $100 a day for days 21–100up $1,000for a 30-day stay
Ground ambulance, in network$75 copay$175 copayup $100
Eyewear, yearly limit$175 a year$150 a yeardown $25
Over-the-counter items, yearly$720 a year$300 a yeardown $420
Counties served64down 2
Drug tier 2, generic$1$3up $2
14 lines do not change
Monthly premium$0$0no change
In-network out-of-pocket limit$3,400$3,400no change
Drug deductible$0$0no change
Part B premium reduction, monthlynonenoneno change
Primary care visit$0 copay$0 copayno change
Specialist visit$0 copay$0 copayno change
Medical deductible, in networknonenoneno change
Comprehensive dental, yearly limitnot offerednot offeredno change
Hearing aids, yearly limit for both earsnot offerednot offeredno change
Drug tier 1, preferred generic$0$0no change
Drug tier 3, preferred brand$40$40no change
Drug tier 4, non-preferred drug$100$100no change
Drug tier 5, specialty tier33% of the cost33% of the costno change
Drug tier 6, select care drugs$5$5no change

Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026. Your plan's Annual Notice of Change is the letter that confirms your 2027 plan; confirm on Medicare Plan Finder.

What can members do, and by when?

If you live in Santa Clara (CA)

If you do nothing
You are moved into Central Health Harmony 031 on January 1, 2027.
October 15 to December 7, 2026
Open enrollment: choose another Medicare Advantage plan, or Original Medicare with a drug plan, instead.

If you live in Los Angeles (CA), Orange (CA), Riverside (CA), San Bernardino (CA), San Diego (CA)

Your coverage
Ends December 31, 2026: Central Health Harmony 031 is not sold where you live.
October 15 to December 7, 2026
Open enrollment: join another Medicare Advantage plan, or Original Medicare with a drug plan. Coverage starts January 1, 2027.
December 8, 2026 to the end of February 2027
A special enrollment period because the plan is leaving: you can still join a plan, but coverage starts the first day of the month after you join, so choose by December 31 to have no gap.
If you do nothing
You are enrolled in Original Medicare when the plan ends, without a drug plan unless you join one (with Extra Help or full Medicaid, Medicare enrolls you in one).
Without a drug plan
Going 63 days or more in a row without drug coverage can mean a late enrollment penalty if you join a drug plan later; joining by the end of February keeps a January and February gap under 63 days, waiting longer does not.

Source: Medicare.gov, “Special enrollment periods” and “Joining a plan” (read Oct. 7, 2026).

Where did its members live?

Where its members lived in September 2026; each county and state page lists the 2027 plans sold there.

All 6 counties, most members first; CMS hides counts under 11 per county, so the counties add up to a little less than the plan's total
CountyMembers, Sept. 2026For 2027
Santa Clara, CA978moves into H3815-031
San Diego, CA177plan ends here
Riverside, CA102plan ends here
Los Angeles, CA56plan ends here
San Bernardino, CA35plan ends here
Orange, CA12plan ends here

Source: CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).

What else should you check?