Lisa Hertz, M.D., earned her Doctor of Medicine from Harvard Medical School and then completed her internship and residency in Internal Medicine and fellowship in Gastroenterology at UCLA. Dr. Hertz is board certified in both Internal Medicine and Gastroenterology.
Lisa Hertz, M.D., earned her Doctor of Medicine from Harvard Medical School and then completed her internship and residency in Internal Medicine and fellowship in Gastroenterology at UCLA. Dr. Hertz is board certified in both Internal Medicine and Gastroenterology.
The reviews listed below were collected independently of Unio Specialty Care through rater8. Each review represents an authentic and verified patient experience.
I’ve been a patient of Dr. Hertz for a very long time She has always helped diagnose and give me good advice on my medical needs . She has always been able to help!
(3 days ago)
Feb-2026
Dr Hertz is wonderful. Highly recommend.
(5 days ago)
Feb-2026
Love Dr. Hertz!
(2 weeks ago)
Feb-2026
She is the best ! Been going to her for many many years
(2 weeks ago)
Feb-2026
Best doctor ever! She’s so thorough and knowledgeable!
(3 weeks ago)
Feb-2026
Dr Hertz is wonderful!
(3 weeks ago)
Feb-2026
Had a colonoscopy with Dr Hertz. She and the entire medical team at the surgery center made me feel completely comfortable. Highly recommended!
(1 month ago)
Jan-2026
Everything went smoothly from check-in all the way to checkout the staff was incredibly nice and professional and very thorough on everything they did. I went to sleep and woke up like it never even happened. Thank you so much for a smooth procedure
(1 month ago)
Jan-2026
She takes her time to ask and answer questions. She is caring and listens to your concerns.
(1 month ago)
Jan-2026
Very sweet and professional
(1 month ago)
Jan-2026
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GI-Los Alamitos
4772 Katella Ave Suite 200 Los Alamitos, CA 90720
Lisa Hertz, M.D., earned her Doctor of Medicine from Harvard Medical School and then completed her internship and residency in Internal Medicine and fellowship in Gastroenterology at UCLA. Dr. Hertz is board certified in both Internal Medicine and Gastroenterology. She has been in private practice in the Long Beach/Los Alamitos area since 1989 and has extensive experience in treating a wide range of gastrointestinal illnesses with a focus on promoting thorough and complete healing through personal, intuitive and research-based care. Special areas of interest include inflammatory bowel disease (Ulcerative Colitis and Crohn’s disease) as well as colon cancer screening.
Dr. Hertz is currently a member of the Southern California Society of Gastroenterology, the Crohn’s and Colitis Foundation and the Long Beach branch of the American Medical Women’s Association. She has served as Chair of Gastroenterology at St. Mary’s Medical Center and currently sits on the medical executive committee at the Memorial Outpatient Surgery Center of Long Beach.
In addition to practicing medicine, she is a devoted mother to her two daughters Ali and Chloe, as well as her four legged children Ruby, Peanut and Betsy. She enjoys working in her garden at home and being an advocate for environmental and animal rights issues.
I’ve been a patient of Dr. Hertz for a very long time She has always helped diagnose and give me good advice on my medical needs . She has always been able to help!
Dr Hertz is wonderful. Highly recommend.
Love Dr. Hertz!
She is the best ! Been going to her for many many years
Best doctor ever! She’s so thorough and knowledgeable!
Dr Hertz is wonderful!
Had a colonoscopy with Dr Hertz. She and the entire medical team at the surgery center made me feel completely comfortable. Highly recommended!
Everything went smoothly from check-in all the way to checkout the staff was incredibly nice and professional and very thorough on everything they did. I went to sleep and woke up like it never even happened. Thank you so much for a smooth procedure
She takes her time to ask and answer questions. She is caring and listens to your concerns.
Very sweet and professional