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 have been Dr. Hertz’s patient for many years. She or the BEST!
(6 days ago)
May-2026
Dr Hertz is a wonderful doctor who cares about her patients.
(1 week ago)
May-2026
I’m a repeat client. She’s an exceptionally professional, dedicated and caring doctor in her field.
(1 week ago)
May-2026
Dr Hertz always does a great
(1 week ago)
May-2026
Dr. Hertz is always so kind and takes time to discuss with the patient everything that’s going to happen.
(1 week ago)
May-2026
Fantastic physician. Great bedside manner and knows her stuff. Compassionate and so helpful with the details we all know can be troublesome with the GI system.
(1 week ago)
May-2026
Dr Hertz is always so thorough and patient with me during my appointment. I appreciate the time she takes to explain when I have questions.
(2 weeks ago)
May-2026
Dr. Hertz is professional, engaging, caring and always explains procedures. I have been seeing her for 30 years. She has done all of my colonoscopies. I admire her personally and professionally!
(3 weeks ago)
Apr-2026
Dr. Hertz, is very professional and is dedicated in provides such outstanding care for me as a patient. She is patient and takes her time when I have either office visits or tele visits. Dr. Hertz is very honest and straightforward in treating and diagnosing me as her patient. She always makes her patients care her number 1 priority.
(3 weeks ago)
Apr-2026
Always very knowledgeable & professional. Makes you feel like you are her only patient.
(1 month ago)
Apr-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 have been Dr. Hertz’s patient for many years. She or the BEST!
Dr Hertz is a wonderful doctor who cares about her patients.
I’m a repeat client. She’s an exceptionally professional, dedicated and caring doctor in her field.
Dr Hertz always does a great
Dr. Hertz is always so kind and takes time to discuss with the patient everything that’s going to happen.
Fantastic physician. Great bedside manner and knows her stuff. Compassionate and so helpful with the details we all know can be troublesome with the GI system.
Dr Hertz is always so thorough and patient with me during my appointment. I appreciate the time she takes to explain when I have questions.
Dr. Hertz is professional, engaging, caring and always explains procedures. I have been seeing her for 30 years. She has done all of my colonoscopies. I admire her personally and professionally!
Dr. Hertz, is very professional and is dedicated in provides such outstanding care for me as a patient. She is patient and takes her time when I have either office visits or tele visits. Dr. Hertz is very honest and straightforward in treating and diagnosing me as her patient. She always makes her patients care her number 1 priority.
Always very knowledgeable & professional. Makes you feel like you are her only patient.