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About

Summary: Roswell Park Care Network (RPCI Oncology, PC) is a privately held medical practices network affiliated with Roswell Park Cancer Institute. Headquartered in Buffalo, NY, it was founded in 2013 and employs about 34 people. The network spans Western and Central New York and beyond, with 18 locations including Jamestown, Depew, Orchard Park, Cheektowaga, Lockport, Niagara Falls, Williamsville, Olean, Schenectady, Syracuse, Watertown, and more. RPCI Care Network aims to provide comprehensive cancer care and specialty services close to home, aligning with Roswell Park Cancer Institute. The Jamestown, NY location is actively hiring (e.g., Registered Nurse role as of April 2026).

Clinic Type

Oncology

Address

21 Porter Avenue Jamestown, NY 14701 United States

Phone

716-664-1909

Email

paul.visco@roswellpark.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • Oncology
  • Medical Oncology
  • Gynecologic Oncology
  • Hematology
  • Breast cancer diagnosis and treatment
  • Gynecologic cancer care
  • Laboratory services
  • Chemotherapy infusion
  • IV treatments
  • Supportive care
  • Laboratory testing
  • Patient portal

Team

  • Peter J. Frederick, MD, FACOG — Gynecologic Oncology
  • Katherine LaVigne Mager, MD, FACOG — Gynecologic Oncology
  • David L. Crooks, MD, FACS, FSSO — Surgical Oncology
  • Isosceles Garbes, MD — Hematologic Oncology
  • Susan Gustafson, PA-C — Medical Oncology and Hematology

Insurance & Payment

  • Independent Health

The Roswell Park Care Network participates with the majority of health insurance plans in our community. A full list of accepted plans is available via the linked page; if Roswell Park Care Network is not in your network, contact the office for options.

Languages Spoken

  • English

FAQs

What services are offered at Jamestown location?

On-site chemotherapy infusion center, medical and gynecologic oncology and hematology consultations, chemotherapy treatments, therapeutic phlebotomy, intravenous infusions and other IV treatments, clinical laboratory testing, and access to Roswell Park’s supportive services.

Is there an on-site laboratory and can I access lab results online?

Yes. The Jamestown facility has an onsite accredited clinical laboratory; patients can access their lab results online through the Patient Portal.

What kinds of supportive care are available?

Occupational therapy, physical therapy, nutrition counseling, pain management, psychosocial support, and access to Roswell Park’s comprehensive supportive services.

Which insurance plans are accepted?

The Roswell Park Care Network participates with the majority of health insurance plans in the community, including Independent Health. For a full list, please refer to the insurance page and contact the office if yours is not in-network.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Vitals: 2.4 (individual provider at Cancer Care of WNY, Jamestown)
  • UPMC Provider Directory: 4.9/5 (119 reviews (for specific provider Dr. Evadne C. Ong, Jamestown))

Patients praise

  • Compassionate and attentive care
  • Effective communication and thorough explanations
  • Valuable support from patient navigators

Common complaints

  • Low rating for individual provider within the practice (Cancer Care of WNY)

"Dr. Ong is the doctor I've been searching for and I'm now so appreciative to have found her In Jamestown! She listened to all of my concerns, answered all of my questions, and I feel like I'm on the pathway to a healthier life."

UPMC Provider Directory

"My GLCCC doctors were great, and having Theresa there to help me navigate the endless stream of appointments was invaluable. She was so caring and compassionate."

Buffalo Healthy Living Magazine

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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