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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 Magee-Womens Hospital
UPMC Presbyterian

Patient Satisfaction Ratings:
5 Stars
79 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.

January 07, 2020

I think Dr. Riddler and her nurse Stephanie Cordis are great! I am blessed with all the great doctors I have and Dr. Riddler is definitely one of them. She always gives me more than enough time to discuss my issues. And I feel she is always looking out for me, knows my health history well and asks good questions to get me to think about health issues I may not thought about. I am very pleased with her as my PCP!!

December 16, 2019

everything went well

December 03, 2019

A thoroughly good visit, no further comments

November 05, 2019


November 04, 2019

Sharon Riddler is the best provider I have had in my years of care! She has a well rounded knowledge on different issues, she makes me feel very comfortable at each visit and takes the time out to know what's going on in my personal life.

October 15, 2019

very happy with my care.

October 14, 2019


September 30, 2019

I think Doctor Riddler is a top notch physician, and your lucky to have her working for you.

September 30, 2019

Dr. Riddler has always been professional and given me the best care for me and my condition.

September 17, 2019

I have had nothing but good experiences from this doctor.