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Note: We can schedule appointments for many — but not all — UPMC doctors and locations at this number.

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Internal Medicine

Sub Specialty:
Infectious Diseases

Hospital Affiliation(s):
UPMC Presbyterian
UPMC Magee-Womens Hospital

Patient Satisfaction Ratings:
5 Stars
73 Patient
Satisfaction Ratings
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No Practice Locations Found


Infectious Disease, American Board of Internal Medicine
Internal Medicine, American Board of Internal Medicine


MD, Medical College of Wisconsin, Milwaukee, WI

University of Missouri Kansas City,
Kansas City, MO

University of Pittsburgh School of Medicine,
Pittsburgh, PA

Appointment Information

New Patients

Appointment Information

Call 1-800-533-UPMC (8762), Monday through Friday between 7 a.m. and 7 p.m. to schedule an appointment OR call the locations listed above to speak with a representative.

Returning Patients

  • Your doctor may participate in scheduling through MyUPMC. If you would like to book online, please log in and visit the Appointments tab.
  • Call the locations listed above to speak with a representative.

Patient Ratings

Rate the Provider

Listens Carefully

Spends Enough Time with You

Recommend This Provider to Family/Friends

Shows Respect for Patients

Provides Easy to Understand Information

Explains in a Way You Understand

Patient Comments

At UPMC we believe transparency is critical. Patient comments found on UPMC Find A Doc are not investigated to ascertain truth or validity. Comments are posted in the spirit of providing patient's perceptions of their encounters with their providers.

Patient comments are gathered from our Press Ganey Patient Satisfaction Survey and are displayed in their entirety. Patients are not identified for confidentiality and patient privacy.

June 04, 2019

I've always entrusted Dr Riddler with my care. She's been a wealth of important information about my chronic illness and has made me feel very good about myself. Her staff is always readily available to answer any concerns I have at any time. I have total faith in her experience and expertise as being my professional career doctor!

June 04, 2019

Dr Riddler is both a good listener and good explainer. I like our rapport.

May 28, 2019

Sharon always has a presence of genuine concern for my care.

May 28, 2019

Best relationship I have ever had with a medical provider.

April 22, 2019

I love Dr. Riddler. I just wish I could keep seeing her. Hopefully UPMC and Highmark can work something out. Otherwise I have no choice but to change doctors.

April 15, 2019

I have been seeing Dr. Riddler for my medical care for years. She has always worked with me to improve my health and for this I am grateful.

April 01, 2019


March 19, 2019

she is wonderful knowledgeable and ales excellent care of my needs

March 18, 2019

Dr Riddler is the best

February 05, 2019

Dr Riddler is the absolute best!