GI Fellowship Program

Physicians Pavillion

Fellowship Program in Gastroenterology and Hepatology at OHSU

Mt. HoodThank you for your interest in the fellowship training program in Gastroenterology at Oregon Health & Science University. Our goal is to provide you with an outstanding education in both Gastroenterology and Hepatology in a collegial, supportive and academically challenging environment. In the sections below, we have provided you with an overview of our division and curriculum. You will also find an example of a typical schedule and answers to commonly asked questions. Additionally, we have included some information about our affiliated hospitals, and information on the city of Portland and the state of Oregon.


Janice Jou, MD, MHS
Program Director

Kian Keyashian, MD
Associate Program Director


Application Process

We have 2 fellowship positions available to begin during the 2016-2017 academic year, and we will start receiving applications for those positions through ERAS starting in July 2015.

OHSU is registered to participate in the Electronic Residency Application Service (ERAS).  Please go to the ERAS for Fellowships Website to apply. 

Our program requests the following supporting documents:

Our program participates in the National Residency Matching Program (NRMP) for Gastroenterology. No applications will be accepted outside of the Match. Please visit the NRMP web site for more details.

Need further information about our program? Please contact Chelsea Podkowa at for further information.

We look forward to your application.


OHSU GI Fellowship Program
Oregon Health & Science University
Division of Gastroenterology
3181 SW Sam Jackson Park Road  
Mailcode  L-461
Portland, OR 97239

Phone (GI Division #): 503-494-7127

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The fellowship program consists of a total of seven fellows. The first year primarily entails inpatient clinical responsibilities on the consultative services at OHSU and the Portland VA Medical Center. While on the GI Consult Service, the fellow is part of a team that includes a GI attending and a medical resident. The team is responsible for performing GI consultations for patients on the medical and surgical services. The duties of the fellow include the supervision and direction of the service, and the instruction of the housestaff and students in basic aspects of Gastroenterology. The fellow is supported by full time faculty members who serve as resources for any questions, problems or procedures that are required day or night. In addition, for the first month, the first-year trainee is accompanied by a second-year fellow to help him/her ease into the new environment. The program is structured to develop strong bonds between the fellows and faculty members, resulting in the best teaching and patient care possible.

The first year fellow will obtain extensive experience in diagnostic and therapeutic upper and lower endoscopic procedures. Emphasis is placed on the appropriate application of endoscopy as well as attainment of technical skills. During the first three months of fellowship, The Summer Core Lecture series is presented twice weekly by members of the GI/Hepatology faculty, the surgery faculty, and a variety of other services. Topics include: introduction to endoscopy, stress management during fellowship, basics of GI  Pathology, management of GI bleeding, inflammatory bowel disease, jaundice, Hepatitic C, capsule endoscopy, esophageal manomtery, etc. which serve as an introduction into the subspecialty. The first-year fellows will also spend a total of two outpatient months at Kaiser Permanente as a consulting Gastroenterologist to obtain experience in the private practice of Gastroenterology.

The second and third year of fellowship allow for more time to pursue scholarly activities that are a mandatory part of the program requirements. These may include participation in research projects, presentations at national and international Gastroenterology meetings and journal publications. Each fellow is encouraged to align him/herself with one of the faculty members and participate in research on a topic of joint interest. There is less emphasis on consult rotations.  In the latter part of the third year, the fellow serves as the attending on the GI consult service at the University with faculty back-up. This is an experience unique to our program and a significant confidence builder before entering the “real world”.

The fellows attend a number of conferences both within the Division and the Department of Medicine. The fellows organize and present a weekly Medical-Surgical conference along with surgeons, radiologists and pathologists. A second weekly conference allows for topics in pathology, hepatology, clinical nutrition and hepatobiliary disease. Every Friday morning, there is a research conference during which research topics and meeting presentations are discussed. There is also training in the critical review of the medical literature. An outstanding medical school library, internet/literature search access, courses and seminars in the basic sciences, statistics and public health courses are also available.

Oregon Coast

Additionally, several visiting professor programs are arranged each year. This involves having nationally and internationally renowned academic Gastroenterologists from other institutions visit our program for one to two days. During this time, he/she presents didactic lectures and seminars on research or clinical topics with the fellows, medical residents, and staff.

The Gastroenterology training program is designed to be flexible and provide access to the program director and faculty. It is our goal to produce thoughtful, well-rounded, knowledgeable Gastroenterologists.

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Multnomah FallsDavid A. Lieberman, MD 
Professor of Medicine 
Chairman, Division of Gastroenterology/Hepatology
Undergraduate education: University of Michigan 
MD: University of Michigan 
Residency/Chief Residency: OHSU 
GI Fellowship: OHSU 
Research interests: Colon cancer screening, Barrett's esophagus, Outcomes in endoscopy

Atif Zaman, MD, MPH
Professor of Medicine
Vice Chair of Clinical Programs, Department of Medicine
Section Chief, Division of Gastroenterology and Hepatology
Undergraduate education: Boston University 
MD: Tufts University 
Residency: Baylor College of Medicine 
GI Fellowship: OHSU 
Research interests: Portal hypertension, Endoscopic Research, Gastrointestinal hemorrhage, Outcomes Research, Epidemiologic Research, Hepatitis C

Judith F. Collins, MD 
Associate Professor of Medicine 
Section Chief, Gastroenterology, Portland VAMC 
Medical Director, Inflammatory Bowel Disease Clinic
Undergraduate education: Duke University 
MD: Medical University of South Carolina 
Residency: Medical University of South Carolina 
GI Fellowship: OHSU/UCLA 
Research interests: Inflammatory bowel disease, Colonic neoplasia

Joseph Ahn, MD, MS
Associate Professor of Medicine
Director of Clinical Hepatology
Undergraduate: Northwestern University
MD: Northwestern University
Residency: University of Chicago
GI Fellowship: Northwestern University
Research Interests: Hepatitis B, Hepatitis C, Liver transplantation

Gene Bakis, MD
Assistant Professor of Medicine
MD: Albany Medical College, Albany, NY
Residency: University of Massachusetts, Worcester, MA 
GI Fellowship: State University of New York, Buffalo, NY
Therapeutic Endoscopy: Maine Medical Center, Portland, Maine
Clinical and Research interests: Pancreatic and biliary disorders, intraductal endoscopy, biliary stenting, ERCP in post-surgical anatomy and GI bleeding 

Michael F. Chang, MD, MSc
Assistant Professor of Medicine
Undergraduate education: Boston University, College of Arts and Sciences
MD: Boston University School of Medicine
Masters of Science: Boston University School of Public Health
Residency: Boston University IM Residency Program
GI Fellowship: Boston University
Hepatology Fellowship: Beth Israel Deaconess Medical Center

Sharlene L. D'Souza, MD
Assistant Professor of Medicine
Director of Endoscopy, PVAMC
Undergraduate education: University of Oklahoma
MD: University of Oklahoma
Residency: Dartmouth-Hitchcock Medical Center
Fellowships: University of Nebraska Medical Center (GI), University of Michigan (Advanced Endoscopy)
Research interests: Endoscopic research, Pancreaticobiliary disorders, Outcomes research

Brintha K Enestvedt, MD, MBA 
Assistant Professor of Medicine 
Undergraduate education: University of North Carolina - chapel hill
MD: Northwestern University Feinberg School of Medicine
MBA: Northwestern University Kellogg School of Management
Residency: OHSU
GI Fellowship: OHSU 
Advanced endoscopy fellowship: University of Pennsylvania 
Research interests: Therapeutic Endoscopy, clinical outcomes related to endoscopy, EUS, fellowship training, women's studies

M. Brian Fennerty, MD, FACG 
Professor of Medicine 
Undergraduate education: University of New York, Albany 
MD: Creighton University 
Residency: Naval Hospital, San Diego 
GI Fellowship: Arizona Health Sciences Center 
Research interests: Gastroesophageal reflux disease, Helicobacter pylori, Barrett's esophagus, Pharmacoeconomics, Outcomes Research, Therapeutic Endoscopy, Metaanalyses, Esophageal Motility, Endoscopy

Janice Jou, MD, MHS
Assistant Professor of Medicine 
Program Director, Gastroenterology and Hepatology Fellowship

Undergraduate education: Northwestern University 
MD: Northwestern University Medical School 
Residency: University of Wisconsin Hospital and Clinics, Madison, WI 
GI and Transplant Hepatology Fellowship: Duke University Medical Center 
Research interests: Hepatocellular carcinoma, Health services research in liver disease

Ronald M. Katon, MD 
Professor of Medicine 
Undergraduate education: University of Vermont 
MD: Chicago Medical School 
Residency: OHSU 
GI Fellowship: OHSU 
Research interests: Ultrathin endoscopy, Variable stiffness colonoscopy, Argon beam endoscopic, therapy, Biliary/pancreatic endoscopy

Kian Keyashian, MD
Assistant Professor of Medicine
Associate Program Director, Gastroenterology and Hepatology Fellowship
Director of fellows’ clinic
Undergraduate education: University of California, Davis
MD: University of California, San Francisco
Residency: University of Michigan
GI Fellowship: University of Southern California
IBD Fellowship: University of Chicago
Research Interests: Ulcerative Colitis, Chron’s Disease, Inflammatory Bowel Disease, Quality Improvement, Outcomes Research, Epidemiologic Research

Ranjan Mascarenhas, MD
Assistant Professor of Medicine
Division of Gastroenterology & Hepatology

MD: St. John's Medical College, Bangalore University, India
Residency: Loyola University Medical Center, Maywood, IL
GI Fellowship: University of California, San Francisco, Fresno, CA
Hepatology Fellowship: Johns Hopkins University School of Medicine, Baltimore, MD
Research Interests: HCC, Portal Hypertension, Colon Cancer Prevention, Endoscopic research

Nir Modiano, MD, PhD
Assistant Professor of Medicine
Director, Inflammatory Bowel Disease Program
Undergraduate education: Yale University
MD, PhD: Yale School of Medicine
Residency: Stanford School of Medicine
GI Fellowship: UCLA
IBD Fellowship: Cedars-Sinai Medical Center
Research Interests: Novel diagnostic and therapeutic strategies in Inflammatory Bowel Disease

Willscott Naugler, MD
Assistant Professor of Medicine
Undergraduate education: Rhodes College, Memphis TN
MD: University of Arkansas for Medical Sciences
Internship: Barnes Hospital, Washington University, St Louis, MO
Residency/Chief Residency: OHSU
GI Fellowship: University of California at San Diego
Research Interests: Liver regeneration, liver transplantation, multi-disciplinary care of liver cancer

Anna W. Sasaki, MD, PhD 
Associate Professor of Medicine 
Director of Nutritional Support, PVAMC, OHSU 

Undergraduate education: University of Delaware 
MD: Jefferson Medical College 
Residency: Wilmington Medical Center 
PhD: University of Delaware 
GI Fellowship: Uniformed Services University of the Health Sciences
Research interests: Nutrition in end-stage liver disease, Hepatitis C, molecular predictors of progression from cirrhosis to hepatocellular carcinoma, developing optimal care strategies for patients on interferon therapy

Barry Schlansky, MD MPH
Assistant Professor of Medicine
Undergraduate education: Penn State University
MD: Jefferson Medical College
Residency: University of Washington
GI Fellowship: OHSU
Transplant Hepatology Fellowship: OHSU
Research Interests: Liver Cancer, Liver Transplantation, Complications of Cirrhosis

Amnon Sonnenberg, MD, MSc 
Professor of Medicine 
MD: University of Bonn, Germany 
Residency: University of Dusseldorf, Germany 
GI Fellowship: Triemli Hospital, Zurich, Switzerland

Current Fellows:

Sarah Diamond, MD
MD: University of Miami
Residency: OHSU

Domi Le, MD
Residency: OHSU

Ryan Childers, MD
MD: Johns Hopkins University
Residency: Johns Hopkins University

Emily Rolfsmeyer, MD
MD: University of Nebraska
Residency: Maine Medical Center

Zibing Woodward, MD
MD: University of Minnesota
Residency: OHSU

Karen Saks, MD
MD: Sackler School of Medicine
Residency: OHSU

Danielle Tholey, MD
MD: Jefferson Medical College of Thomas Jefferson University
Residency: Thomas Jefferson University


Answers to commonly asked questions:

1. Rotational assignments:

Year Service Duration
1st Clinical Service 6 months
Hepatology 1 or 2 months
Kaiser 1 or 2 months
3-4 months
2nd Clinical Service 3 months
HMO experience(Kaiser) 2 months
Hepatology 3 months

4 months
3rd Clinical Service 3 months
HMO experience(Kaiser) 2 months
Hepatology 3 months
Research/Elective 4 months
Attending on OHSU Consult Service 1 month

2. The attending staff supervises all GI consultations and endoscopic proMt. Hoodcedures.

3. RESEARCH and ELECTIVES - Fellows are given many opportunities to pursue research activities during and throughout their training. They will participate in a 3 month series each summer (taught by Dr. Zaman) on research design and statistical methods. All of our fellows participate in national meetings and are expected to present scholarly work at scientific meetings. Mentorship is an important part of our program, and we aim to align fellows with research mentors who will help them pursue their areas of interest.

Our elective rotations include experience in our Inflammatory Bowel Disease Clinic, motility, capsule endoscopy, and advanced procedures. The elective rotation is a favorite among our fellows!

4. HEPATOLOGY - Regional hepatology and liver transplant service with exposure to acute and chronic liver disease and participation on the Liver Transplant Service. The Portland VA Medical Center is a regional liver transplant center for the VA. Total Hepatology time is 6 months.

6. FLEXIBILITY - there is flexibility in the third year schedule which can allow for increased experience and length of time committed in Hepatology or special research projects.

7. SPECIAL FEATURE - assignment of a fellow during his/her third year of training to be the attending faculty on the University GI Consulting Service.

8. PRIVATE PRACTICE EXPOSURE-unique exposure to large volume ambulatory care experience with the fellow functioning as a full consultant in an HMO setting, being exposed to cost-effective and managed care principles.

9. ELECTIVES - Additional endoscopy time, subspecialty clinics (IBD, hepatology, transplant hepatology, hepatobiliary), capsule and manometry.

10. Weekly conferences

11.Participation as instructor and small group leader in sophomore GI Pathophysiology course for medical students.

12. Call schedule for 1st and 2nd year fellows: average every fourth night and fourth weekend. Call is taken from home. 1st and 2nd year fellows arrange their own call schedule, to allow for flexibility
3rd year fellows: weekend call approximately every 6-8 weeks, and weekday call only during the month as GI consult attending

13. Salary (2014-2015):

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Clinical Facilities

OHSU Hospital
OHSU/VA SkybridgeOHSU provides the most comprehensive complement of health care services in the state in its four clinical care units: OHSU Hospital, Doernbecher Children's Hospital, OHSU Clinics (medical and dental), and Child Development and Rehabilitation Center.

The OHSU hospitals and clinics are Oregon's main clinical teaching facilities for the next generation of health care professionals. Patients come from as far away as Alaska; but most of those cared for (93 percent) come from Oregon. Patients from every county in Oregon were cared for at OHSU last year (46 percent from outside Multnomah County). OHSU and Doernbecher Children's Hospitals have 349 operating beds.

The U.S. News and World Report annual nationwide survey has consistently placed OHSU Hospital in America's top three percent of the specialties such as AIDS, cancer, cardiology, endocrinology, geriatrics, gynecology, neurology, otolaryngology, rheumatology and urology. OHSU Hospital is the only Oregon hospital cited in this top echelon.

In addition to providing primary and secondary care services to residents of the Portland area, OHSU Hospital is a major tertiary referral center, particularly in areas of transplantation (kidney, heart, liver, lung, bone marrow), cardiology, oncology, trauma, interventional radiology, obstetrics and ophthalmology. Ancillary services are excellent, including IV transportation and phlebotomy services.

Veterans Affairs Medical Center
The Veterans Affairs Medical Center, a modern 490-bed facility, serves Oregon and Southern Washington and acts as a referral center for Idaho, Alaska and Northern California. The medicine, radiology, surgery, pathology, nuclear medicine and psychiatry services are fully integrated with OHSU programs. Each member of the medical staff at VAMC is a full-time faculty member at OHSU. Because OHSU Hospital and VAMC are adjacent and connected by a sky bridge, continuous exchange of attending staff exists between the hospitals. There are seven inpatient services: Five services in general medicine, oncology and a combined CCU/ICU. The cardiology department maintains a fully equipped, centrally monitored coronary care unit and echocardiographic, angiographic, electrophysiologic and hemodynamic laboratories. A multi-disciplinary medical intensive care unit maintains nine beds and a closely associated pulmonary laboratory. Ancillary services include an IV team, a transportation service and twice-a-day phlebotomy. There are health care technicians, who are hired to assist residents on nights and weekends with a variety of patient care activities, such as phlebotomy, IV starts and passage of nasogastric tubes.

An active ambulatory care service, made up of initial evaluation and emergency care centers, as well as longitudinal clinics, is a major component of the training program. In addition there is a high volume short stay care and complex diagnostic unit that has helped obviate many admissions and facilitates outpatient diagnosis and management of complex problems.

In the fall of 1992, the pedestrian sky bridge connecting OHSU Hospital with VAMC was completed. Separated by a deep ravine, the previous walking distance between the two facilities was nearly one mile. The bridge has greatly shortened this trip and further facilitated conference and clinic attendance, as well as offering spectacular views of Mt. Hood, Mt. St. Helens, Mt. Adams and the city of Portland.

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Portland and Oregon

With a population of more than 1.5 million in the greater metropolitan area, Portland is a major cultural center in the Pacific Northwest. Portlanders enjoy the Oregon Symphony, the Portland Opera, the Oregon Ballet Theater, a wide selection of art museums, galleries and live theater. It serves as a second home for the Oregon Shakespeare Festival, based in Ashland, Oregon. Famous for its addiction to books, Portland has numerous excellent book stores, including Powell's with its 500,000-plus volumes the largest in the western United States. In addition, Portland features its own professional basketball, baseball, indoor soccer and ice hockey teams.

Mt. Hood and Portland SkylinePortland contains 7,500 acres of parkland in 160 locations, including Forest Park, the largest urban wilderness area within any U.S. city. The Pacific Ocean is 80 miles to the west and the Columbia Gorge, Mount Hood, the Cascade Mountains and millions of acres of national forest are within one to two hours drive from the city. Recreational opportunities (summer and winter) are limitless.

The Portland metropolitan area enjoys a strong diversified economy. Due to model land use laws, growth in Portland and Oregon is rational and controlled. Because of excellent planning and the TriMet public transportation system, which includes a modern light rail line, traffic congestion is modest compared to other cities.

Due to a steady growth in the population and other secular trends in medical care (e.g., managed health care), there is a great demand in the Northwest for physicians trained in internal medicine. Excellent opportunities exist in all urban, suburban, and rural areas of Oregon and Washington. In addition, excellent opportunities exist in Alaska, and the nearby intermountain states (Idaho, Wyoming, Montana).

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Portland Facts

Mild, with temperatures averaging 66 degrees in the summer and 38 degrees in the winter. The area gets approximately 37 inches of precipitation a year, most of which is rain. While Portland does get snow it is seldom more than a couple inches a year and rarely lasts more than one or two days.

Outdoor Recreation
Camping, fishing, hiking, river rafting, biking, skiing, wind surfing, and kite flying, all within an hour's drive from the city. Portland has 9,400 acres of parks, including the smallest park in the world (Mill Ends Park) and the largest urban wilderness (Forest Park).

The metropolitan area offers many spectator sports, from the NBA's Portland Trail Blazers , the MLS’s Portland Timbers to the WHL's Portland Winter Hawks . There are also running events, bicycle and car races, pro/am golf tournaments, horse racing and more.

Portland hosts numerous art galleries and museums. It also boasts a world-class symphony, ballet and opera, as well as a number of theater groups and jazz clubs.

Other Attractions