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Dr. Mark Geller, MD

Dr. Mark Geller, MD

Endocrinology, Diabetes & Metabolism*
35+ years of experience

Dr. Mark Geller, MD is a diabetes & metabolism endocrinologist in Tarzana, CA and has over 35 years of experience in the medical field. Dr. Geller has extensive experience in Osteoporosis & Screening. He graduated from University of California at Berkeley in 1985. He is affiliated with medical facilities such as Northridge Hospital Medical Center and West Hills Hospital and Medical Center. He is accepting new patients and telehealth appointments.

4.8 Star Rating
Based on 304 reviews 4.8 Star Rating (304 reviews)

Facey Medical Group - Tarzana

18133 Ventura Blvd Ste 204 Tarzana, CA 91356
Telehealth available

Make an Appointment

Hospital Highlight

Dr. Geller is affiliated with French Hospital Medical Center San Luis Obispo, a highly rated hospital.

At a Glance

  • Area of Expertise
    Dr. Geller specializes in the area of Internal Medicine. See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    America’s 100 Best Hospitals for Critical Care Award™ See hospitals
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Dr. Geller's Reviews

Likelihood to recommend Dr. Geller

4.8

304 ratings, 289 with a written review
5 Star
88%
88%
4 Star
9%
9%
3 Star
0%
0%
2 Star
1%
1%
1 Star
2%
2%

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RecentHighestLowestMost Helpful
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Apr 15, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Apr 11, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Apr 08, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Apr 08, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 31, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 24, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 24, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 21, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 09, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 07, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 03, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Mar 02, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Feb 20, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
No results
What could be improved
No results
Helpful
Feb 17, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Feb 08, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
No results
What could be improved
No results
Helpful
Feb 04, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Feb 03, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
No results
What could be improved
No results
Helpful
Feb 01, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Jan 31, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?
What went well
  • Explained conditions well
What could be improved
No results
Helpful
Jan 27, 2025
×Post a ResponseAre you Dr. Mark Geller, MD?

Leave a review

How was your experience with Dr. Geller?

About Me

biography

Dr. Mark Geller, MD is a diabetes & metabolism endocrinologist in Tarzana, CA and has over 35 years of experience in the medical field. Dr. Geller has extensive experience in Osteoporosis & Screening. He graduated from University of California...read more
  • Endocrinology, Diabetes & Metabolism

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • University Of California At Berkeley

    Medical School, 1985
American Board of Medical Specialties®
American Board of Internal Medicine®
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Locations

Facey Medical Group - Tarzana

Facey Medical Group - Tarzana18133 Ventura Blvd Ste 204 Tarzana, CA 91356
1

Affiliated Hospitals

  • French Hospital Medical Center

    1911 Johnson Ave
    San Luis Obispo, CA 93401
    Recipient of 3
    hospital awards

    Outstanding Patient Experience Award™ (2024, 2022)

    Top in the nation for overall patient experience based on nine measures related to doctor and nurse communication, hospital cleanliness and noise levels, and medication and post-discharge care instructions

    View all awards

    How patients felt about the care they received at this hospital.

    91%
    Patients said they were given information about recovering at home

    7% higher than the national average

    82%
    Patients said that nurses always listened to them and explained things well

    7% higher than the national average

    View all patient feedback
  • Providence Saint Joseph Medical Center

    501 S Buena Vista St
    Burbank, CA 91505
    Recipient of 4
    hospital awards

    Patient Safety Excellence Award™ (2025, 2024, 2023)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    83%
    Patients said they were given information about recovering at home

    1% lower than the national average

    77%
    Patients said their room and bathroom were always kept clean

    10% higher than the national average

    View all patient feedback
  • Providence Holy Cross Medical Center

    15031 Rinaldi St
    Mission Hills, CA 91345
    Recipient of 22
    hospital awards

    America’s 100 Best Hospitals for Critical Care Award™ (2025)

    Superior clinical outcomes in treating pulmonary embolism, respiratory system failure, sepsis, and diabetic emergencies

    America's 100 Best Hospitals Award™ (2025, 2024, 2023)

    Superior clinical outcomes in treating pulmonary embolism, respiratory system failure, sepsis, and diabetic emergencies

    View all awards

    How patients felt about the care they received at this hospital.

    87%
    Patients said they were given information about recovering at home

    3% higher than the national average

    78%
    Patients said that doctors always listened to them and explained things well

    2% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality