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Internal Medicine

Sub Specialty:
Interventional Cardiology
Bloodless Medicine

Hospital Affiliation(s):
Magee-Womens Hospital
UPMC Mercy
UPMC Presbyterian
UPMC Northwest
UPMC Passavant
UPMC Shadyside

Language Spoken:

Patient Satisfaction Ratings:
5 Stars
84 Patient
Satisfaction Ratings
Learn About Our Survey


UPMC Heart and Vascular Institute
UPMC Presbyterian
200 Lothrop St.
Suite 5B
Pittsburgh, PA 15213
Office Phone:
(412) 647-6000


Cardiovascular Disease, American Board of Internal Medicine
Interventional Cardiology, American Board of Internal Medicine


MD, Universidad Franciso Marroquin, Guatemala City, Guatemala

University of Pennsylvania Health System,
Philadelphia, PA

University of Pittsburgh School of Medicine,
Pittsburgh, PA

University of Pittsburgh School of Medicine,
Pittsburgh, PA

Mount Sinai Medical Center,
Miami Beach, FL

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

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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.

October 02, 2017

Dr Marroquin is very attentive and cares about my health-he is an excellent doctor and i enjoy my visits/time with him

October 02, 2017

excellent physician..very focused and attentive to my concerns..familiar with current studies and treatment recommendations ..highly recommend

August 28, 2017

great service by all.

August 14, 2017

Everyone was helpful and friendly

July 31, 2017

He is a Great doctor, who cares

July 31, 2017

All employees of Presby were polite and helpful whether I asked for directions, etc.. Sandy receptionist at Cardiovascular 5th B wing, Angie (Angela) nurse who took my vitals and questions and Dr. Oscar Marroquin who's the Best!

July 24, 2017

Simply....The Best!!!!!

July 10, 2017

My recent visit with Dr. Oscar was one of the best experiences I've ever had when pertaining to medical needs. He's very personable and caring, took time to listen to me and gave great explanation for my future treatment.

July 10, 2017

very caring and understanding

June 26, 2017

Grate as always