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.
Professional, caring and friendly!
(3 days ago)
Jun-2026
She’s excellent. I’ve been going to her for 23 years
(6 days ago)
Jun-2026
Personable and informative
(1 week ago)
Jun-2026
She is an amazing doctor. She is such a nice person and answers all questions very thoroughly.
(1 week ago)
Jun-2026
The best gastro doctor ever. Thorough, professional, kind, caring and attention to detail.
You can’t have a better doctor.
(2 weeks ago)
Jun-2026
Above and beyond routine care. I was treated as an individual that needed medical care, not just a “case”. She explained things in terms that I could understand!
(3 weeks ago)
Jun-2026
Dr. Hertz is wonderful!
(1 month ago)
Jun-2026
Great job Nicky seen procedure went well. Nurse and anesthesiologist was wonderful.
(1 month ago)
Jun-2026
Dr . Hertz is a wonderful doctor I will miss her .when she retires . I respect her as a person and a great doctor
(1 month ago)
May-2026
Dr. Hertz is an exceptional provider. She is attentive, kind and thorough. I feel well cared for and always leave with a care plan.
(1 month ago)
May-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.
Professional, caring and friendly!
She’s excellent. I’ve been going to her for 23 years
Personable and informative
She is an amazing doctor. She is such a nice person and answers all questions very thoroughly.
The best gastro doctor ever. Thorough, professional, kind, caring and attention to detail. You can’t have a better doctor.
Above and beyond routine care. I was treated as an individual that needed medical care, not just a “case”. She explained things in terms that I could understand!
Dr. Hertz is wonderful!
Great job Nicky seen procedure went well. Nurse and anesthesiologist was wonderful.
Dr . Hertz is a wonderful doctor I will miss her .when she retires . I respect her as a person and a great doctor
Dr. Hertz is an exceptional provider. She is attentive, kind and thorough. I feel well cared for and always leave with a care plan.