The Oncology Institute | Leading Oncology & Cancer Care
Oncology • Calexico, CA • Since 2007 • over 100 clinics and affiliate locations locations
About
The Oncology Institute (TOI) is a public cancer care provider focused on delivering highly specialized, value-based oncology services in community settings. Founded in 2007 and headquartered in Cerritos, California, TOI operates over 100 clinics and affiliate locations across multiple states (and related international presence noted as 6 countries in some highlights). The organization employs 180+ clinicians (with a broader staff total around 234) and offers comprehensive cancer care including clinical trials, transfusions, chemotherapy, and other advanced treatments close to patients’ homes. Key details: - Stock: TOI (public), IPO in 2021; current price around $0.46 (as per provided data) - Revenue: approximately $502.7 million annually - Market cap: about $34.2 million - Founded: 2007; headquarters: Cerritos, CA - Focus areas: medical oncology, hematology, chemotherapy, clinical trials, value-based care, patient-centered care across community settings Note: The provided highlights emphasize TOI’s broad clinical footprint, community-based model, and ongoing expansion, with some data that may reflect multiple sources or time points. If you’re specifically seeking TOI in Calexico, verify clinic location and services directly on TOI’s site or contact their office for the most current local offerings.
Clinic Type
Oncology
Address
18000 Studebaker Rd, Cerritos, California 90703, US
Phone
18003705722
medicalrecordsrequest@theoncologyinstitute.com
Opening Hours
Not published — contact the clinic to confirm hours.
Services Offered
Technology & Equipment
Insurance & Payment
—
appointment request online
Languages Spoken
Commitments
Social Media
Photos








What Patients Say
Overall sentiment across review platforms: mixed
- Birdeye: 4.4/5 stars (183 reviews (Northridge location))
- Birdeye: 4.5/5 stars (138 reviews (Chula Vista location))
Patients praise
- High-quality care from doctors and nurses in-person
- Attentive and clear communication from specific providers
- Staff described as kind, caring, and professional at certain locations
- Accommodating environment at some facilities
Common complaints
- Difficulty reaching office staff by phone
- Long hold times with call centers
- Unorganized and understaffed experiences
- Concerns regarding lack of empathy from staff
- Issues with appointment scheduling and wait times
"The facility has been great doctors and nurses alike but when you call in, the service is horrendous."
— LocalityBiz Review"Impossible to directly contact anyone in the office. All calls automatically go to an offshore call center."
— MapQuest/Yelp ReviewSynthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].
In the News
- The Oncology Institute Achieves $1.8 Million in Medicare — Apr 13, 2026
- The Oncology Institute Reports First Quarter 2026 Financial Results — May 7, 2026
- The Oncology Institute Reaffirms 2025 Guidance and Provides Preliminary 2026 Outlook | MarketScreener — Jan 12, 2026
- The Oncology Institute Completes Strategic Refinancing with OrbiMed, Repaying the Outstanding ... | Healthcare | postregister.com — Jul 7, 2026
- The Oncology Institute Announces Leadership Promotions — Jan 9, 2026
Information sourced from the clinic's website as of July 10, 2026.
More oncology clinics in Calexico
Summary: Sequoia Regional Cancer Center is part of Kaweah Health, a Visalia-based, privately owned community healthcare system serving Tulare County, California. Kaweah Health offers a broad range of services including cancer care (Sequoia Regional Cancer Center), emergency services, surgery, heart and vascular, imaging, infusion, dialysis, hospice, home care, and more. The organization operates from multiple California locations (notably Visalia and Tulare) with headquarters at 400 W Mineral King Ave, Visalia. Founded in 1963, Kaweah Health employs over 5,000 staff and 700 medical staff, and it has additional international presence (Canada, Botswana, New Zealand). It emphasizes advanced cancer care, including programs like robotic lung cancer surgery performed with the da Vinci Xi system. If you’re seeking cancer care under Kaweah Health, the Sequoia Regional Cancer Center is the affiliated cancer-focused facility within this system.
ECRMC Calexico Outpatient Center is part of El Centro Regional Medical Center’s network of outpatient facilities in the Imperial Valley. It offers primary and specialty care services similar to other ECRMC centers, with professional staff focused on comfort and quality care. The center is located in Calexico, CA, and is designed to provide convenient access to outpatient services, including primary care and specialty treatments, as part of ECRMC’s broader outpatient network. If you’re seeking specific services (e.g., wound healing, oncology, imaging) in Calexico, confirm whether the Calexico location offers those exact outpatient programs or directs you to the closest ECRMC facility.
Comparing your options?
See other oncology clinics in Calexico, or search the full directory by insurance, ratings, and more.

