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The Oncology Institute

4.4 out of 5 · 321 reviews

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

Email

medicalrecordsrequest@theoncologyinstitute.com

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • oncology services
  • cancer care
  • precision cancer treatments
  • targeted therapies
  • clinical trials and research services
  • high-value cancer care program
  • support services for medical, emotional, social, and psychological needs
  • traditional therapies
  • latest breakthrough treatments
  • care coordination and patient-centered care

Technology & Equipment

  • state-of-the-art cancer care technologies
  • innovative technologies for personalized patient support
  • access to clinical trials and research services

Insurance & Payment

—

appointment request online

Languages Spoken

  • English

Commitments

  • High-Value Cancer Care (HVCC) Program ensures personalized support throughout cancer care journey
  • alignment with patient needs and quality of life

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 Review

Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 10, 2026.

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