About

Sarah Hassan, MD joined the OC Blood & Cancer Care team in 2018. Originally from Chicago, she is excited to call Orange County her new home.

Before she began residency, Dr. Hassan worked as a research associate at the University of Illinois Department of Surgery in Chicago. While assisting with Islet Cell Transplant for Type 1 Brittle Diabetics, she discovered an interest in immunology, molecular biology, and progressive treatment options that aim to cure presumed incurable diseases. This experience greatly influenced her decision to pursue work in cancer treatments.

Dr. Hassan completed her Internal Medicine residency at St Vincent’s Mercy Medical Center in Toledo, Ohio in 2015. She completed her fellowship in Hematology/Oncology at the University of Cincinnati Medical Center in 2018. She is triple board certified in Internal Medicine, Hematology, and Medical Oncology.

Dr. Hassan supports Integrative Medicine and although she enjoys working with all patients, she is most interested in treating breast cancer. She strongly values patient autonomy and personalized medicine. Her goal is to provide empathetic care and dignity to every patient she treats.

In her free time Dr. Hassan loves to hike, spend time at the beach, travel, learn different languages, and appreciate art. She is fluent in Urdu and understands basic Polish and Spanish.

Board Certifications:
  • American Board of Internal Medicine- Internal Medicine
  • American Board of Internal Medicine-Medical Oncology
  • American Board of Internal Medicine-Hematology
Areas of Interest:
  • Breast Cancer
  • Supports Integrative Medicine
Languages

English

Provider Specialty

Hematology-Oncology, Hematology/Oncology

Areas of Care

Education

Medical School

Bahria University, Shifa College of Medicine

2008

Internship Program - Internal Medicine

Mercy St. Vincent Medical Center

2013

Residency Program - Internal Medicine

St Vincent Mercy Medical Center GME

2013

Internship/Residency - Internal Medicine

Mercy St. Vincent Medical Center

2015

Fellowship Program - Hematology

University of Cincinnati Medical Center

2018

Locations

MemorialCare Cancer Institute - Orange Coast Medical Center (Patient Care Pavilion)

18111 Brookhurst St. Suite 6100

Fountain Valley, CA

Office: 657-241-9755

Insurance

Please consult your health care provider or health plan for the most accurate information about your health plan’s coverage of a particular health care service offered at a MemorialCare facility. Learn more about our Accepted Health Plans.

Patient Reviews

5.0 out of 5
(500 Ratings)
Oct 31, 2025
Anonymous
Amazing DoctorDr. Hassan has the most wonderful bedside manner, she’s so knowledgeable and quick to put you at ease. It’s like talking with a dear friend that will likely save my life…literally. I couldn’t imagine a better oncologist!
Oct 30, 2025
Anonymous
Everything about Dr Hassan is amazing and I feel blessed to be her patient. She is thorough and goes the extra mile to meet all expectations for my health needs.
Oct 30, 2025
Bruce L.
Oct 23, 2025
Anonymous
Dr. Hassan was warm & friendly.She asked pointed questions & gave me plenty of time to ask her questions & have a discussion.I waited only a very short time before she came into the exam room for my appointment.I highly recommend Dr. Hassan!
Oct 21, 2025
Kathie P.
Oct 8, 2025
Anonymous
Truly Caring and Professional DoctorDr. Sarah Hassan was compassionate, professional, and extremely knowledgeable. She took the time to listen, explain my treatment clearly, and her expertise gave me complete confidence that I was in the best possible care.
Oct 6, 2025
Christina W.
Sep 30, 2025
Elvira L.
Sep 26, 2025
Jennifer M.
Sep 23, 2025
Sandy G.
Love Dr. Sarah Hassan! Dr. Hassan is so professional and also very personable! When I see her she makes me feel at ease and comfortable.

Source: Reviews are aggregated from third-party review sites such as Facebook, Google, HealthGrades, RepuGen, Vitals, WebMD, and Yelp.