Current Fellows
Chief Gastroenterology Fellow
Alan Noll, MD
Year III
MS: Tulane University School of Medicine
R: Emory University
Fun Facts
Alan Noll, MD
Hometown: Cleveland, OH
Undergrad: Baldwin Wallace University
Career Interests: Transplant Hepatology, Bioethics, Implementation Science
Lives In: Oakland neighborhood
Life Outside of Medicine: Cooking (eating), golf, podcasts and kayaking
Favorite things to do in Pittsburgh: Biking through Schenley Park, dining at Pusadee’s Garden and kayaking in North Park
Favorite things about the UPMC GI Fellowship: All the supportive and welcoming co-fellows.
Advanced Endoscopy Fellow
Kathan Chintamaneni, MD
MS: Medical College of Wisconsin
R: LAC + USC Medical Center
Fun Facts
Kathan Chintamaneni, MD
Hometown: Milwaukee, WI
Undergraduate College: Washington University in St. Louis, MO (2012)
Career Interests: General GI, Advanced Endoscopy
Lives In: Point Breeze
Life Outside of Medicine: Plant daddy, Zillow addict and obsessive Dyson user with an exercise addiction
Favorite things to do in Pittsburgh: Exploring my new city on foot, trying out new coffee shops and breweries (not necessarily together) and finding spots with a nice view for picnics.
Favorite things about the UPMC GI Fellowship: Supportive attendings who care about their patients, hands-on training from day 1, and having a night float system is a big perk too! Definitely a better work-life balance with built in mechanisms to reduce burnout.
Advanced Transplant Hepatology Fellow
Stela Celaj, MD, PhD
Year III
MS: Northwestern University The Feinberg School of Medicine
R: McGaw Medical Center of Northwestern University
Fun Facts
Undergraduate College: Utrecht University, The Netherlands
Career Interests: Hepatology
Lives In: Shadyside
Life Outside of Medicine: traveling, pub trivia, running, binge-watching HBO/Netflix, mochi (green tea, but I’ll be happy with other kinds too).
Favorite things to do in Pittsburgh: coffeeshops, walking around the many different neighborhoods and parks
Favorite things about the UPMC GI Fellowship: my awesome co-fellows, supportive faculty, great exposure of diverse liver and GI pathology.
Advanced Transplant Hepatology Fellow
Pranav Penninti, DO
MS: Texas College of Osteopathic Medicine
R: University of Texas Health San Antonio
Fun Facts
Pranav Penninti, DO
Hometown: Hyderabad, India
Undergraduate College: University of Pittsburgh
Career Interests: Hepatology
Lives In: Harmar
Life Outside of Medicine: Trying to stay active with basketball, pickleball, and running.
Favorite things to do in Pittsburgh: Spending time with family and hopefully going to lots of Steelers games.
Favorite things about the UPMC GI Fellowship: Everyone has been incredibly warm and welcoming from fellows to faculty.
Gastroenterology Fellows
Muaz Aijazi, MD
Year II
MS: Batterjee Medical College
R: UPMC Mercy
Fun Facts
Muaz Aijazi, MD
Hometown: Jeddah, Saudi Arabia
Career Interests: Pancreatology, Advanced Endoscopy
Lives In: Shadyside
Life Outside of Medicine: Basketball, soccer, traveling, and good food.
Favorite things to do in Pittsburgh: Eating at Salem’s. Hanging out in Schenley Park.
Favorite things about the UPMC GI Fellowship: The people! From our co-fellows to faculty, program leadership, program coordinator, and literally all members of staff, the people here are all incredible.
Zheng (John) Che, MD
Year II
MS: University of Toledo
R: University of Michigan
Fun Facts
Hometown: Columbus, OH
Undergrad: Ohio State University
Career Interests: Hepatology and General Gastroenterology
Lives In: Shadyside
Life Outside of Medicine: Golf, watching Ohio State football, being a foodie
Favorite things to do in Pittsburgh: Exploring the many breweries/restaurants and easily accessible parks
Favorite things about the UPMC GI Fellowship: Camaraderie and support from co-fellows. Night float system. Learning endoscopy.
Andrew Groff, MD
MS: Penn State College of Medicine
R: UPMC
Fun Facts
Hometown: Lancaster, PA
Undergrad: Denison University
Career Interests: General Gastroenterology, Advanced Endoscopy
Lives In: Lawrenceville
Life Outside of Medicine: Playing sports (basketball, pickleball, golf), running, Penn State football, reading, and traveling.
Favorite things to do in Pittsburgh: Running on Three Rivers Heritage Trail and in Frick Park, exploring new restaurants and breweries, and summer nights at PNC Park.
Favorite things about the UPMC GI Fellowship: Strong and diverse Clinical Training (early scopes!) with excellent and supportive faculty. Night Float System. Fun and awesome Co-Fellows.
Muhammad Haseeb, MD
Year I
MS: Nishtar Medical University: MD; Harvard Medical School: MMSc
R: Montefiore Medical Center- Wakefield
Fun Facts
Hometown: Multan, Pakistan
Undergrad: Emerson University Multan
Career Interests: Therapeutic & Bariatric Endoscopy | Funded Physician Scientist
Lives In: South Side/ South Side Flats
Life Outside of Medicine: Trying different restaurants, Playing squash, badminton, and tennis
Favorite things to do in Pittsburgh: Exploring parks and biking with my wife.
Favorite things about the UPMC GI Fellowship: Supportive faculty/fellows. This is a large program with ample resources to customize fellowship experience based on each fellows’ goals and ambitions.
Kyle Hoffman, MD
Year I
MS: University of Cincinnati
R: Case Western/University Hospitals
Fun Facts
Hometown: Cleveland, OH
Undergrad: Ohio State University
Career Interests: IBD
Lives In: Lawrenceville
Life Outside of Medicine: Running, Basketball, Golf
Favorite things to do in Pittsburgh: Eating (lots of new places to try!); -Exploring parks/hiking with my wife and dog
Favorite things about the UPMC GI Fellowship: Everyone wanting to teach; Early exposure to procedures
Guylda R. Johnson, MD
Year I
MS: University of Rochester School of Medicine & Dentistry
R: University of Rochester Medical Center
Fun Facts
Hometown: Amityville, NY
Undergrad: Pennsylvania State University
Career Interests: Transitions in IBD (#Med-Peds)
Lives In: Whitehall
Life Outside of Medicine: Entertain my 3.5-year-old and 14-month-old
Favorite things to do in Pittsburgh: Top to-do item: explore the Pittsburgh Zoo with my family on my next day off
Favorite things about the UPMC GI Fellowship: The people!! Everyone has been so supportive, kind, and encouraging. The senior fellows really look out for us newbies, which is very appreciated!
Sagar Joshi, MD
MS: University of Texas, Medical Branch
R: University of Michigan
Fun Facts
Sagar Joshi, MD
Hometown: Houston, TX
Undergrad: University of Texas at Austin
Career Interests: General Gastroenterology and Esophagology
Lives In: Shadyside
Life Outside of Medicine: Mixology. Coffee enthusiast. Board and video games.
Favorite things to do in Pittsburgh: Exploring all of the restaurants within walking and driving distance.
Favorite things about the UPMC GI Fellowship: I did both EGDs and colonoscopies during my first week of fellowship. The attendings are great and are always willing to give scoping, life, and career advice. Also, my co-fellows are the best!
Chang Kyung (Joanna) Kim, MD, PhD
Year I
MS: Stony Brook Medicine
R: UPMC
Fun Facts
Hometown: Glendale, CA
Undergrad: University of California, San Diego
Career Interests: Broad interest at this time; I want to pursue translational research
Lives In: Shadyside
Life Outside of Medicine: Watching movies, reading, tennis, shopping at Costco, watching LOL
Favorite things to do in Pittsburgh: Going to plant nursery, trying out different restaurants, visiting farmer’s markets, planning trips to parks/lakes
Favorite things about the UPMC GI Fellowship: Comradery among fellows, great mentorship and career support, exposure to diverse pathologies, and great research culture
Michal Kloska, MD, PhD
Year III
MS: Poznan University of Medical Sciences, Faculty of Medicine I, Poland
R: Lehigh Valley Health Network
Fun Facts
Hometown: Miedzyrzecz, Poland
Undergrad: Poznan University of Medical Sciences
Career Interests: General GI, Advanced Endoscopy
Lives In: Gibsonia
Life Outside of Medicine: I enjoy cooking new cuisines, reading about ancient history, and spending time with my wife
Favorite things to do in Pittsburgh: Spending time with family in the Burgh and still exploring this awesome city.
Favorite things about the UPMC GI Fellowship: Diverse patient population and the amazing co-fellows and faculty
Fei-Pi (Phoebe) Lin, MD
MS: Virginia Commonwealth University School of Medicine
R: University of Pittsburgh Medical Center
Fun Facts
Hometown: Richmond, VA
Undergrad: College of William and Mary
Career Interests: Hepatology and General Gastroenterology
Lives In: Bloomfield
Life Outside of Medicine: Hiking. Paddleboarding. Propagating/taking care of my indoor plants.
Favorite things to do in Pittsburgh: Going to the Penguins games, Pirates games, etc. Trying different local restaurants in the surrounding neighborhoods. Running in Frick Park.
Favorite things about the UPMC GI Fellowship: Great sense of camaraderie among the fellows, supportive faculty/staff, learning to scope early on.
Gabriel Marrero-Rivera, MD
Year II
MS: University of Puerto Rico, Medical Science Campus
R: University of Illinois at Chicago
Fun Facts
Hometown: San Juan, Puerto Rico
Undergrad: University of Puerto Rico, Rio Piedras Campus
Career Interests: General Gastroenterology
Lives In: South Side / Station Square
Life Outside of Medicine: Playing guitar and piano. Cooking. Salsa dancing. Tennis. Avid Cubs fan!
Favorite things to do in Pittsburgh: Getting to know the city and exploring new trails, restaurants, and breweries.
Favorite things about the UPMC GI Fellowship: Supportive faculty. Night float system. Vast exposure to complex GI/hepatology cases in an academic environment. Amazing co-fellows.
Zain Moosvi, MD
Year III
MS: University of Maryland School of Medicine
R: University of California – Irvine
Fun Facts
Hometown: Frederick, MD
Undergrad: University of Maryland
Career Interests: Advanced Endoscopy
Lives In: Shadyside
Life Outside of Medicine: Playing sports, working out, hanging out with friends
Favorite things to do in Pittsburgh: Exploring the city and checking out the many parks
Favorite things about the UPMC GI Fellowship: The fellows are all awesome and the attendings are very supportive and excellent instructors. The program is very strong clinically and procedurally heavy with ample exposure to all fields within GI.
Joseph Sleiman, MD
Year III
MS: University of Balamand, Lebanon
R: Cleveland Clinic Foundation
Fun Facts
Hometown: Lebanon
Undergrad: University of Balamand
Career Interests: IBD radiomics, immunotherapy colitis, and colorectal neoplasia
Lives In: Wilkinsburg
Life Outside of Medicine: Hiking and camping trips, travel, Comics fan, foodie
Favorite things to do in Pittsburgh: Karaoke, kayaking, and exploring parks
Favorite things about the UPMC GI Fellowship: The opportunity to create my own schedule to meet my needs for conferences, national and international society commitments, but also get enough education and scoping time
Yujie (Richie) Sun, MD
Year II
MS: Zucker School of Medicine at Hofstra/Northwell
R: UPMC
Fun Facts
Hometown: Northfield, MN
Undergrad: Northwestern University
Career Interests: General Gastroenterology and Advanced Endoscopy
Lives In: Bloomfield
Life Outside of Medicine: Fishing (both fresh and saltwater). Backyard gardening. Traveling.
Favorite things to do in Pittsburgh: Going to Steelers games in the fall. Biking around different neighborhoods and exploring new restaurants. Walking around the numerous parks in the city.
Favorite things about the UPMC GI Fellowship: Amazing faculty and wonderful co-fellows. Night float system. Diverse pathology.
Linda Wang, MD
Year II
MS: University of Pittsburgh
R: Beth Israel Deaconess Medical Center
Fun Facts
Hometown: York, PA
Undergrad: University of Pennsylvania
Career Interests: IBD and General Gastroenterology
Lives In: Shadyside
Life Outside of Medicine: Knitting and bouldering.
Favorite things to do in Pittsburgh: Exploring the food scene. Walking through different neighborhoods.
Favorite things about the UPMC GI Fellowship: Friendly people, interesting cases, and learning to scope.
Andy Wu, MD
Year I
MS: Northwestern University Feinberg School of Medicine
R: UPMC
Fun Facts
Hometown: Cleveland, OH
Undergrad: The Ohio State University
Career Interests: Medical education, and potentially hepatology or advanced endoscopy
Lives In: Shadyside
Life Outside of Medicine: Skiing, golfing, and running through all the nearby parks
Favorite things to do in Pittsburgh: Exploring all the outdoor breweries and the food trucks
Favorite things about the UPMC GI Fellowship: How open, friendly, and welcoming everyone has been! The faculty, GI lab staff, and my co-fellows have all made the transition so much easier.
Contact Us
Division of Gastroenterology,
Hepatology and Nutrition
Mezzanine Level, C-Wing, PUH
200 Lothrop Street
Pittsburgh, PA 15213
412-864-7091 | Email