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382 Patient Reviews

Mark Lawrence Geller

Internal Medicine Physician - Endocrinology, Diabetes & Metabolism

Highlights

  • Board Certified

Biography

Mark Lawrence Geller is a Internal Medicine Physician - Endocrinology, Diabetes & Metabolism practicing in Tarzana, CA

He has not yet shared a personalized biography with Doctor.com.

Featured Review See More Reviews

He is easy to talk to. He is helpful.…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
University of Ca, San Diego, School of Medicine LA Jolla CaOther Degree1985
University of CaliforniaMedical Degree1985

InstitutionFocusYear
Residency - Santa Clara Valley Medical Center Program Not Specified
Residency - Stanford University Hospital, Endocrinology, Diabetes & Metabolism; Santa Clara Valley Medical Center, Internal MedicineNot Specified

CertificationCert. BodyYear
Internal medicine
Sub-Specialty: Endocrinology, Diabetes and Metabolism
Internal MedicineNot Specified

Specialties

Languages Spoken
English
Medical Specialties
  • Internal Medicine Physician - Sub-Specialty: Endocrinology, Diabetes & Metabolism

Internal Medicine

Years In Practice: 33 (started in 1992)

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 4.9
Number of Reviews: 382
Most Recent Review: 12/13/2025
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Office & Staff Evaluation Not rated

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Office Appearance & Atmosphere Not rated
Handling of Billing Matters Not rated
Average Wait Time Not Rated

Provider Evaluation

Clear Explanations
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Verified Patient

He is easy to talk to. He is he...

He is easy to talk to. He is helpful.

Anonymous 12/13/2025
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Verified Patient

Dr. Geller has been my endocrino...

Dr. Geller has been my endocrinologist / internist for 30 years. I wouldn't see anyone else unless it was an emergency. He absolutely has always asked for my input and opinion regarding my diabetes. I appreciate that because he takes everything into consideration before suggesting the appropriate medical treatment. I've referred many people over the years to him.

Anonymous 12/07/2025
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Verified Patient

All good...

All good

Anonymous 11/29/2025
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Verified Patient

Dr. Geller is an incredible doct...

Dr. Geller is an incredible doctor.

Anonymous 11/21/2025
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Verified Patient

Great experience...

Great experience

Anonymous 11/17/2025
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Verified Patient

I've been going to Dr. Geller fo...

I've been going to Dr. Geller for 30 years. He is a great doctor. He listens and takes very good care of me.

Anonymous 12/13/2025
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Verified Patient

Dr. Mark Geller is a wonderful d...

Dr. Mark Geller is a wonderful doctor. He is caring, extremely knowledgeable, and helpful.

Anonymous 12/05/2025
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Verified Patient

Very good...

Very good

Anonymous 11/26/2025
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Verified Patient

Wonderful doctor..very happy wit...

Wonderful doctor..very happy with doctor geller.

Anonymous 11/19/2025
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Verified Patient

Dr. Mark Geller in my opinion is...

Dr. Mark Geller in my opinion is a very good doctor, he will listen to what I have to say and his response is usually something I don't like but it's my own fault in not listening. As far as being called by anyone no I just need to look on my chart to see the results and talk with the Dr. On my next visit. As for the staff up front very kind and quick to get you done. The nurse is is very good who brings me in the room and she personable which helps with anxiety of seeing the doctor. All in all I've had a really good experience with all your staff.

Anonymous 11/13/2025
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Procedures & Services

Procedures & Treatments Offered

    Commonly Prescribed Medications

    Mark Lawrence Geller has not yet listed the medications that he commonly prescribes.

    Accepted Insurance

    Accepted Insurance

    Mark Lawrence Geller has not yet specified the insurance plans he accepts.
     

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