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464 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

Good…

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: 34 (started in 1992)

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 5
Number of Reviews: 464
Most Recent Review: 08/10/2026
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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

Good...

Good

Anonymous 08/10/2026
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Verified Patient

Dr. Geller is the best!...

Dr. Geller is the best!

Anonymous 08/08/2026
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Verified Patient

THANKS FOR CARING...MAKING REFER...

THANKS FOR CARING...MAKING REFERRALS, APPOINTMENTS, LAB TESTS..ANNUAL REVIEW OF MY HEALTH

Anonymous 08/04/2026
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Verified Patient

Doctor Mak Geller is a great doc...

Doctor Mak Geller is a great doctor. I trust him with my health care and he cares for my wellbeing.

Anonymous 07/31/2026
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Verified Patient

I have been a patient of Dr. Gel...

I have been a patient of Dr. Geller for a few years. He is very professional, personable, kind, caring, and I feel heard and valued as a patient. I appreciate his approach to preventative and proactive care. I will be sad to see him retire - and I am also thrilled for him that he is retiring. He is a wonderful doctor.

Anonymous 07/30/2026
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Verified Patient

Very GOOD experience I love my d...

Very GOOD experience I love my doctor and he's whole staff thank you Doc

Anonymous 08/09/2026
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Verified Patient

I had a wonderfu caring primary ...

I had a wonderfu caring primary care physician for over 25 years. Unfortunately, I've had to find another doctor recently, but I feel so lucky that I am now a patient of Dr. Geller, because he provides the same standard of care as my former.doctor.

Anonymous 08/08/2026
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Verified Patient

Care attention and services were...

Care attention and services were excellent.

Anonymous 08/03/2026
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Dr. Geller is the best. He is al...

Dr. Geller is the best. He is always concerned about his patients. My whole family is going to him because of myself and my husband.

Anonymous 07/31/2026
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Verified Patient

Once again, I'm gonna let you gu...

Once again, I'm gonna let you guys know. The only problem is trying to get through to any of the Facey offices it has you waiting sometimes for over an hour. The phone system has not been fixed. This is a continuous problem that we have sometimes you're forced to go ahead and make your appointments through the app but if you're an elderly person, how can you do that some of our senior citizens can't make appointments over and out some are not computer illiterate or have good phone functions. It needs to be addressed. You need to be able to get through to the operator or anyone for that fact not just over the Internet aside from that the doctor is 100% on point the staff is amazing. The Care team is just great. They're there for you 100% but in order for you to get more people, your phone system needs to be fixed.

Anonymous 07/28/2026
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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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