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 & Affiliations

Locations

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

18111 Brookhurst St. Suite 6100

Fountain Valley, CA

Office: 657-241-9755

Research

Trial Number: 428-23

Condition: Breast Cancer

Conducted at: Orange Coast Medical Center

Participant Age Range: 18 years to 100 years

Participant Gender: Any

Enrolling Participants: Yes

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)
Jul 6, 2026
Sandra M.
Great bedside manner very great listener makes you feel comfortable and always there to help you and I would definitely give her a thumbs up. Thank you, Dr. Hassan, and team for making me feel better.
Jul 6, 2026
Sandra M.
I went to this doctor to get answers and she definitely gave me all the answers I needed and she has great bedside manner. She is on top of everything she listens to you. You don’t feel rushed. Her office and all her team very professional, and she follows up, very easy to talk to, and I definitely give the office two thumbs up.
Jul 3, 2026
Heather B.
Jul 1, 2026
Ruth G.
Great doctor
Jun 30, 2026
Miriam M.
Thorough , friendly not rushed
Jun 30, 2026
Jeanne S.
She I very caring goes above and beyond to give excellent, personal treatment.
Jun 24, 2026
Anonymous
Gir Dr Sarah Hassan OncologistVery caring very details
Jun 22, 2026
Teri B.
Caring and always ready to act on demanding referrals!
Jun 22, 2026
Robert F.
Dr Hassan is very friendly and personable.
Jun 22, 2026
Carla V.
She is a caring doctor

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