Medicare contract · plan years 2026 and 2027CMS landscape and crosswalk
UHC of California (H0543)
H0543Contract
A company of UnitedHealth Group, Inc., sold as UnitedHealthcare
41 plans in 2027 (42 in 2026) · 238,722 members in September 2026
UHC of California is the UnitedHealth Group, Inc. company that holds Medicare contract H0543, sold as UnitedHealthcare. In 2027 it offers 41 plans (42 in 2026); 3 of its 2026 plans are not offered in 2027. 238,722 people were in its plans in September 2026.
What plans does H0543 offer for 2027?
| Plan | Type | Monthly premium | Out-of-pocket limit | Area | For 2027 |
|---|---|---|---|---|---|
| AARP Medicare Advantage from UHC CA-0001H0543-013 | HMO-POS | $29 | $5,300 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-0002H0543-019 | HMO-POS | $0 | $2,000 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-0005H0543-035 | HMO-POS | $65 | $7,150 | 3 counties | renews |
| AARP Medicare Advantage from UHC CA-0007H0543-060 | HMO-POS | $52 | $3,800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-0008H0543-086 | HMO-POS | $121 | $7,150 | 1 county | renews |
| AARP Medicare Advantage Patriot No Rx CA-MA1PH0543-121 | HMO-POS | $0 | $5,900 | 5 counties | renews |
| AARP Medicare Advantage from UHC CA-0010H0543-140 | HMO-POS | $99 | $7,150 | 4 counties | renews in fewer counties |
| UHC Sharp Medicare Advantage CA-001PH0543-145 | HMO-POS | $0 | $4,450 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-003PH0543-151 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-0012H0543-152 | HMO-POS | $0 | $3,900 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-0015H0543-166 | HMO-POS | $0 | $999 | 2 counties | renews |
| AARP Medicare Advantage from UHC CA-004PH0543-168 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-005PH0543-169 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-006PH0543-170 | HMO-POS | $0 | $999 | 2 counties | renews |
| AARP Medicare Advantage from UHC CA-7H0543-188 | HMO-POS | $59 | $7,150 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-9H0543-191 | HMO-POS | $71 | $5,900 | 1 county | renews |
| UHC Sharp Medicare Advantage ValueRx CA-12PH0543-204 | HMO-POS | $0 | $4,450 | 1 county | renews |
| UHC Sharp Complete Care CA-15PH0543-214 | HMO-POS C-SNP | $0 | $4,450 | 1 county | renews |
| UHC Complete Care CA-18PH0543-217 | HMO-POS C-SNP | $0 | $800 | 1 county | renews |
| UHC Complete Care CA-19PH0543-218 | HMO-POS C-SNP | $0 | $800 | 1 county | renews |
Show the other 21 plans, by plan number
| Plan | Type | Monthly premium | Out-of-pocket limit | Area | For 2027 |
|---|---|---|---|---|---|
| UHC Complete Care CA-20PH0543-219 | HMO-POS C-SNP | $0 | $999 | 2 counties | renews |
| AARP Medicare Advantage from UHC CA-021PH0543-220 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-022PH0543-221 | HMO-POS | $0 | $999 | 2 counties | renews |
| AARP Medicare Advantage from UHC CA-023PH0543-222 | HMO-POS | $0 | $4,450 | 2 counties | renews |
| UHC Sharp Medicare Advantage CA-026PH0543-225 | HMO-POS | $0 | $4,450 | 1 county | renews |
| UHC Complete Care CA-27PH0543-226 | HMO-POS C-SNP | $0 | $2,000 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-33H0543-232 | HMO-POS | $70 | $7,150 | 1 county | renews |
| AARP Medicare Advantage Giveback from UHC CA-30PH0543-236 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage Giveback from UHC CA-31PH0543-237 | HMO-POS | $0 | $800 | 1 county | renews |
| AARP Medicare Advantage Giveback from UHC CA-32PH0543-238 | HMO-POS | $0 | $999 | 2 counties | renews |
| UHC Complete Care Support CA-1APH0543-239 | HMO C-SNP | $0 | $9,850 | 1 county | renews |
| UHC Complete Care Support CA-2APH0543-240 | HMO C-SNP | $0 | $9,850 | 1 county | renews |
| UHC Complete Care Support CA-3APH0543-241 | HMO C-SNP | $0 | $9,850 | 2 counties | renews |
| UHC Complete Care Support CA-4APH0543-242 | HMO C-SNP | $0 | $9,850 | 1 county | renews |
| UHC Sharp Complete Care Support CA-6APH0543-246 | HMO C-SNP | $0 | $9,850 | 1 county | renews |
| UHC Complete Care Support CA-8APH0543-249 | HMO-POS C-SNP | $0 | $9,850 | 7 counties | renews |
| AARP Medicare Advantage from UHC CA-33PH0543-254 | HMO-POS | $46 | $800 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-34PH0543-255 | HMO-POS | $46 | $800 | 1 county | renews |
| AARP Medicare Advantage Patriot No Rx CA-MA2H0543-258 | HMO-POS | $0 | $5,900 | 1 county | renews |
| AARP Medicare Advantage from UHC CA-45H0543-260 | HMO-POS | $0 | $2,900 | 1 county | new plan |
| AARP Medicare Advantage from UHC CA-46H0543-262 | HMO-POS | $0 | $2,900 | 1 county | new plan |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
Which of its plans end?
| 2026 plan | Members, Sept. 2026 | Counties in 2026 |
|---|---|---|
| AARP Medicare Advantage from UHC CA-8H0543-189 | 3,426 | 1 |
| AARP Medicare Advantage from UHC CA-37H0543-251 | 3,213 | 1 |
| AARP Medicare Advantage from UHC CA-10H0543-193 | 2,399 | 1 |
Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which employer and union group plans does it hold?
H0543 also holds 4 group plans offered through former employers and unions, with 11,773 members in September 2026 (plans with fewer than 11 not counted). They are not sold to individuals, so the landscape files list no premiums or benefits for them; the employer or union sends their 2027 terms.
| Plan ID | Plan name | Members, Sept. 2026 | 2027 |
|---|---|---|---|
| H0543-802 | UnitedHealthcare Group Medicare Advantage | 898 | renews |
| H0543-805 | UnitedHealthcare Group Medicare Advantage | 5,005 | renews |
| H0543-806 | UnitedHealthcare Group Medicare Advantage | 5,870 | renews |
| H0543-810 | UnitedHealthcare Group Medicare Advantage | fewer than 11 | renews |
Source: CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
How did CMS rate it for 2026?
The overall rating is 4 of 5 (health plan 4 of 5, drug plan 4.5 of 5). Of its 44 rated measures, the lowest and the highest:
| Lowest-rated measures | Stars |
|---|---|
| Complaints about the Health Plan | 1 |
| Improving or Maintaining Mental Health | 2 |
| Statin Therapy for Patients with Cardiovascular Disease | 2 |
| Follow-up after Emergency Department Visit for People with Multiple High-Risk Chronic Conditions | 2 |
| Highest-rated measures | Stars |
|---|---|
| Medication Adherence for Diabetes Medications | 5 |
| Rating of Drug Plan | 5 |
| Complaints about the Drug Plan | 5 |
| Call Center – Foreign Language Interpreter and TTY Availability | 5 |
Source: CMS Part C and D Star Ratings data tables, 2026 (October 2025).
What else should you check?
- All UnitedHealthcare plansEvery contract of the brand
- Star ratings of every contractThe 2026 ratings, and 2027 when CMS publishes them
- Find a plan by its IDFrom the card or a letter