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COVID-19 Update

We continue to monitor COVID-19 cases in our area and providers will notify you if there are scheduling changes. Please continue to call your providers with health concerns. We are providing in-person care and telemedicine appointments.

Learn about our expanded patient care options and visitor guidelines.

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A close-up of Sibley Memorial Hospital building.

Gastroenterology and Hepatology Services at Sibley Memorial Hospital, Washington, D.C.

Our clinicians at The Johns Hopkins Division of Gastroenterology and Hepatology at Sibley Memorial Hospital offer the world-class expertise and unparalleled resources of Johns Hopkins Medicine to residents of the Washington, D.C. metropolitan area.

Specialties at Sibley Memorial Hospital

  • Barrett's therapy
  • Chromeoendoscopy
  • Confocal laser endomicroscopy
  • Motility
  • Video capsule endoscopy


All New Patients

In preparation for your first visit, please complete and bring the New Patient Questionnaire to your appointment. Having this completed prior to your appointment will speed up your appointment check-in.

New Hepatology Referrals

If you're interested in becoming a new patient and you have not been seen by a Hopkins provider before, please complete and fax a copy of the Hepatology Patient Registration Form (available as a PDF or Word document) to the office at 202-660-7359.


Inflammatory Bowel Disease

Nurse Practitioners

Alyssa Bardales

Alyssa Bardales

Title: Registered Nurse and Nurse Coordinator
Specialty: Inflammatory bowel diseases

Pancreatobiliary Disease

Nurse Practitioner

Joy C. Bright-Agindotan

Joy C. Bright-Agindotan, M.S.N., F.N.P.-B.C.

Title: Certified Registered Nurse Practitioner
Specialty: Pancreatobiliary diseases

Weight Loss and Obesity

Nurse Practitioner

Kristen Koller

Kristen Koller, C.R.N.P.

Title: Advanced Gastroenterology Nurse Practitioner; Bariatric Nurse Practitioner
Specialty: Advanced therapeutic endoscopy, bariatric endoscopy, pancreaticobiliary disease


Nurse Practitioner

Karla Pillote

Karla Pillote, M.S.N., C.A.N.P.

Title: Certified Registered Nurse Practitioner
Specialty: Hepatology & Liver Transplant

Advanced Endoscopic Procedures

Gastroenterology and Hepatology - Image of Dr. Brett Parker

Brett Parker, M.D.

Assistant Professor of Surgery

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