Providers
112
Locations
41
Specialties
7
Insurance Plans
23
About The Oncology Institute Ca, A Professional Corporation
Background and practice information
The Oncology Institute Ca, a Professional Corporation is a large multi-specialty medical practice based in Lakewood, CA, with 112 affiliated healthcare providers practicing across 41 locations in 3 states.
The practice brings together providers across multiple specialties, including hematology/oncology, nurse practitioner, physician assistant, and medical oncology. Its providers are in-network with 23 insurance plans, though coverage varies by individual provider and should be confirmed before scheduling.
Across its providers, the practice has a reported average Merit-based Incentive Payment System (MIPS) score of 44.9 out of 100, a quality measure published by the Centers for Medicare & Medicaid Services.
Practice Locations
41 locations
The Oncology Institute Ca, A Professional CorporationPrimary
1250 S SUNSET AVE, West Covina, CA 917903900
(626) 283-5183
Lakewood, CA
18 providers
Los Angeles, CA
16 providers
Riverside, CA
13 providers
Las Vegas, NV
12 providers
Fountain Valley, CA
11 providers
Downey, CA
10 providers
San Gabriel, CA
9 providers
Alhambra, CA
7 providers
Corona, CA
7 providers
Long Beach, CA
6 providers
Montebello, CA
6 providers
Whittier, CA
6 providers
San Bernardino, CA
5 providers
Glendale, CA
5 providers
Tucson, AZ
4 providers
Northridge, CA
4 providers
Vista, CA
4 providers
Chula Vista, CA
4 providers
Santa Ana, CA
4 providers
Temecula, CA
3 providers
Henderson, NV
3 providers
Lynwood, CA
3 providers
Murrieta, CA
3 providers
Pasadena, CA
3 providers
Mission Viejo, CA
2 providers
Upland, CA
2 providers
Burbank, CA
2 providers
Covina, CA
2 providers
Mission Hills, CA
2 providers
Anaheim, CA
2 providers
Palm Desert, CA
2 providers
Torrance, CA
2 providers
Los Alamitos, CA
1 provider
Oro Valley, AZ
1 provider
Culver City, CA
1 provider
Thousand Oaks, CA
1 provider
Hemet, CA
1 provider
Victorville, CA
1 provider
Chino, CA
1 provider
Monterey Park, CA
1 provider
Affiliations
Hospitals where providers at The Oncology Institute Ca, A Professional Corporation hold admitting privileges
Insurance Networks
Accepted insurance plans and networks
The Oncology Institute Ca, A Professional Corporation accepts 98 plans from 14 insurers, including Cigna, Aetna, Humana.
Source: CMS Transparency in Coverage filings (March 2026). Network participation may change — verify with the provider's office before scheduling.
Quality & Performance
Specialties at The Oncology Institute Ca, A Professional Corporation
Provider specialties represented at this practice
Healthcare Providers in West Covina
3 providers practice here
Frequently Asked Questions
Common questions about The Oncology Institute Ca, A Professional Corporation
How many providers are at The Oncology Institute Ca, a Professional Corporation?
The Oncology Institute Ca, a Professional Corporation has 112 affiliated healthcare providers across 41 locations. You can browse the full provider roster, with specialties and locations, on this page.
What specialties does The Oncology Institute Ca, a Professional Corporation offer?
The practice includes providers in hematology/oncology, nurse practitioner, physician assistant, and medical oncology, among others. Use the specialty filter on the provider list to find a specific type of provider.
What insurance does The Oncology Institute Ca, a Professional Corporation accept?
Providers at The Oncology Institute Ca, a Professional Corporation are collectively in-network with 23 insurance plans. Acceptance varies by individual provider, so confirm your specific plan with the office before your visit.
Does The Oncology Institute Ca, a Professional Corporation have a quality rating?
The practice's providers have an average MIPS quality score of 44.9 out of 100, based on Centers for Medicare & Medicaid Services data. MIPS measures performance across quality, cost, care coordination, and use of health technology.
Where is The Oncology Institute Ca, a Professional Corporation located?
The Oncology Institute Ca, a Professional Corporation's primary location is in Lakewood, CA, with 40 additional locations listed on this page. See the contact section for the full address and phone number.
Other Group Practices Nearby
Explore more group practices in CA
Western Anesthesia Medical Associates Inc
51 providers · Mission Viejo, CA
Mission Viejo Emergency Medical Associates
17 providers · Mission Viejo, CA
Nebula Health, Llc
17 providers · Mission Viejo, CA
Community Orthopedic Medical Group
16 providers · Mission Viejo, CA
Head And Neck Associates Of Orange County An Incorprate
16 providers · Mission Viejo, CA
Array Skin Therapy A Medical Corporation
12 providers · Mission Viejo, CA
Group Practices in Nearby Cities
Browse group practices elsewhere in CA