Provider networks in California.
InPlan holds provider listings for 40 Medicare Advantage plans that serve California. Ask whether a plan lists a provider and get the answer with its source type and the date we read the directory.
- MEDICARE ADVANTAGE PLANS
- 40
- PLAN YEARS
- 2026 and 2027
- INSURERS AND PLAN ORGANIZATIONS
- 11
- LATEST READ
- 2026-10-29
What we hold in California.
Plans whose provider directories list providers in our data.
| MARKET | PLANS | INSURERS | PLAN YEARS | LATEST READ |
|---|---|---|---|---|
| Medicare Advantage | 40 | 11 | 2026 and 2027 | 2026-10-29 |
How we count: a plan counts when its provider directory lists at least one provider in our data. A provider-plan link is one listing of one provider in one plan. For marketplace plans it counts each plan year and network tier the directory gives; for Medicare Advantage plans it counts each provider once per plan.
Insurers in California.
Plans with provider listings for each insurer or plan organization, as they publish their names. A Medicare Advantage plan counts in every state it serves.
| INSURER | MARKET | PLANS |
|---|---|---|
| Blue Shield of California | Medicare Advantage | 20 |
| Astiva Health | Medicare Advantage | 6 |
| Molina Healthcare | Medicare Advantage | 4 |
| Align Senior Care | Medicare Advantage | 3 |
| AHF | Medicare Advantage | 1 |
| Alameda Alliance for Health | Medicare Advantage | 1 |
| Central California Alliance for Health | Medicare Advantage | 1 |
| Contra Costa Health Care Plus (HMO D-SNP) | Medicare Advantage | 1 |
| Gold Coast Health Plan | Medicare Advantage | 1 |
| HEALTH PLAN OF SAN MATEO | Medicare Advantage | 1 |
| San Francisco Health Plan | Medicare Advantage | 1 |
Who the Medicare Advantage directories list.
More than 115,000 providers who practise in California appear in the Medicare Advantage plans we hold. The most common primary specialties among them:
- Dentist10,693
- Nurse Practitioner7,886
- Marriage and Family Therapist7,479
- Family Practice7,172
- Internal Medicine6,966
- Optometry5,580
- Clinical Social Worker4,707
- Pediatric Medicine4,500
Specialties as the national provider registries record them. A provider counts once per specialty.
Example plans in California.
Plans with the most provider-plan links, with the plan ID the API takes. Look any plan ID up for free with the plan ID lookup.
| PLAN | PLAN ID | YEAR | TYPE | PROVIDER-PLAN LINKS |
|---|---|---|---|---|
| Contra Costa Health Care Plus (HMO D-SNP)Contra Costa Health Care Plus (HMO D-SNP) | H5119-001-000 | 2027 | Medicare AdvantageHMO D-SNP · Special Needs Plan | 64,747 |
| Molina Medicare Complete Care Plus (HMO D-SNP)Molina Healthcare of California | H3038-004-001 | 2027 | Medicare AdvantageHMO D-SNP · Special Needs Plan | 38,419 |
| Blue Shield 65 Plus (HMO)Blue Shield of California | H0504-015-000 | 2027 | Medicare AdvantageHMO | 27,951 |
| Astiva Health C-SNP Deluxe (HMO C-SNP)Astiva Health | H1993-007-000 | 2026 | Medicare AdvantageHMO C-SNP · Special Needs Plan | 12,564 |
| Senior Care (HMO I-SNP)Align Senior Care | H3274-001-000 | 2027 | Medicare AdvantageHMO I-SNP · Special Needs Plan | 8,459 |
A real California answer.
Christian N. Kirman, MD, who practises in Walnut Creek, is listed in H5119-001-000. This is the answer the API gives today for that pair, with its source type and the date we read the listing.
curl -H "Authorization: Bearer $INPLAN_KEY" \ "https://api.inplan.io/v1/check?npi=1003090267&plan_id=H5119-001-000"
{
"npi": "1003090267",
"plan_id": "H5119-001-000",
"market": "ma",
"in_network": true,
"answer": "listed",
"plan_year": 2027,
"source": { "type": "plan_directory", "as_of": "2026-10-29" }
}Christian N. Kirman, MD
Plastic and Reconstructive Surgery · Walnut Creek, CA
Listed
- PLAN
- Contra Costa Health Care Plus (HMO D-SNP)
- INSURER
- Contra Costa Health Care Plus (HMO D-SNP)
- MARKET
- Medicare Advantage, plan year 2027
- PLAN TYPE
- HMO D-SNP
- NEW PATIENTS
- Accepting, per the directory
- SOURCE
- plan_directory · read 2026-10-29
Every California provider, with every plan that lists them.
The California data file is one CSV: one row for each provider and plan pair, for every provider practising in California, with the source type and read date on each row.
Check California providers in your own product.
Send an NPI and a plan ID, get an answer with its evidence. Or ask for every plan that lists a provider. A free key gives 500 calls a month.
Other states
- Alabama
- Alaska
- Arizona
- Arkansas
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Puerto Rico
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Figures counted 2026-10-30. Sources: provider directories published by insurers and plans; public plan and provider registries. InPlan is independent and not affiliated with any insurer named here.