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Meet Our Clinical Team
IBD Adult Gastroenterology Specialists

Marshall S Bedine, M.D.
Expertise, Disease and Conditions:
Gastroenterology, Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome

Aline Charabaty Pishvaian, M.D.
Expertise, Disease and Conditions:
Celiac Disease, Colorectal Cancer Screening, Crohn's Disease, Endoscopic Ultrasound, Immunotherapy Related GI Events, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Ulcerative Colitis

Reezwana Chowdhury, M.D.
Expertise, Disease and Conditions:
Abdominal Pain, Anal Fistula, Anemias, Barrett's Esophagus, Blood in Stool (Hematochezia), Celiac Disease, Celiac Sprue, Clostridium Difficile, Colitis, Colon Cancer, Colon Polyps, Colonoscopy, Colorectal Cancer Screening, Constipation, Crohn's Disease, Diarrhea, Diverticulitis, Esophageal Cancer, Family History of Cancer, Fecal Incontinence, Fecal Microbiota Transplantation, Gastroenterology, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Bleeding, GI Dysplasia, Heartburn, Ileitis, Inflammatory Bowel Disease (IBD), Intestinal Metaplasia, Iron Deficiency, Microscopic Colitis, Stomach Ulcer, Ulcerative Colitis

Sharon Dudley-Brown, Ph.D.
Expertise, Disease and Conditions:
Anal Fistula, Colitis, Crohn's Disease, Gastroenterology, GI Dysplasia, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Pouchitis, Ulcerative Colitis

Mark Gregory Lazarev, M.D.
Expertise, Disease and Conditions:
Anal Fistula, Celiac Disease, Clinical Gastroenterology, Colitis, Colon Polyps, Crohn's Disease, Diarrhea, Digestive Disorders, Fecal Microbiota Transplantation, Gastroenterology, GI Dysplasia, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Pouchitis, Proctitis, Ulcerative Colitis

Joanna Miller Peloquin Melia, M.D.
Expertise, Disease and Conditions:
Anal Fistula, Celiac Disease, Celiac Sprue, Colitis, Crohn's Disease, Fecal Microbiota Transplantation, Gastroenterology, GI Dysplasia, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Pouchitis, Ulcerative Colitis

Alyssa Maria Parian, M.D.
Expertise, Disease and Conditions:
Anal Fistula, Colitis, Crohn's Disease, Fecal Microbiota Transplantation, Gastroenterology, GI Dysplasia, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Perianal Fistula, Pouchitis, Ulcerative Colitis

Florin Marian Selaru, M.D.
Expertise, Disease and Conditions:
Anal Fistula, Cholangiocarcinoma, Clinical Gastroenterology, Colitis, Colonoscopy, Crohn's Disease, Diarrhea, Digestive Disorders, Fecal Microbiota Transplantation, Gastroenterology, GI Dysplasia, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Pouchitis, Proctitis, Sclerosing Cholangitis, Ulcerative Colitis

Brindusa Truta, M.D., M.A.S.
Expertise, Disease and Conditions:
Anal Fistula, Blood in Stool (Hematochezia), Colitis, Crohn's Disease, Family History of Cancer, Fecal Microbiota Transplantation, Gastroenterology, Gastrointestinal Bleeding, GI Dysplasia, Hereditary Colorectal Cancer, Ileitis, Inflammatory Bowel Disease (IBD), Microscopic Colitis, Pouchitis, Rectal Bleeding, Ulcerative Colitis

Huimin Yu, B.M., M.D., Ph.D.
Expertise, Disease and Conditions:
Abdominal Pain, Anal Fistula, Anemias, Clinical Gastroenterology, Clostridium Difficile, Colitis, Colon Cancer, Colonoscopy, Crohn's Disease, Diarrhea, Digestive Disorders, Family History of Cancer, Fecal Incontinence, Fecal Microbiota Transplantation, Gastroenterology, GI Dysplasia, Hemorrhoids, Ileitis, Inflammatory Bowel Disease (IBD), Intestinal Metaplasia, Microscopic Colitis, Pouchitis, Rectal Problem, Stomach Ulcer, Ulcerative Colitis, Vomiting, Vomiting Blood (Haematemesis)
IBD Surgical Specialists

Chady Atallah, M.D.
Expertise, Disease and Conditions:
Anal Abscess, Anal Cancer, Anal Fistula, Colon and Rectal Surgery, Colon Cancer, Colon Surgery, Colorectal Cancer, Colorectal Surgery, Crohn's Disease, Diverticulitis, Fistulas, Hemorrhoids, Inflammatory Bowel Disease (IBD), Inflammatory Bowel Disease Surgery, Minimally Invasive Surgery, Pilonidal Cyst, Rectal Cancer, Rectal Surgery, Robotic and Laparoscopic Surgery, Small Bowel Cancer, Transanal Minimally Invasive Surgery (TAMIS), Ulcerative Colitis

Haniee Chung, M.D.
Expertise, Disease and Conditions:
Anorectal Disorders, Colon and Rectal Surgery, Colon Cancer, Colon Surgery, Colonoscopy, Colorectal Cancer, Colorectal Surgery, Endoscopy, Fecal Incontinence, Fistulas, Hemorrhoids, Inflammatory Bowel Disease (IBD), Laparoscopic and Minimally Invasive Surgery, Minimally Invasive Surgery, Minimally-invasive Colorectal Cancer Surgeries, Rectal Cancer, Rectal Surgery, Robotic Surgery, Transanal Minimally Invasive Surgery (TAMIS)

Jonathan Edward Efron, M.D.
Expertise, Disease and Conditions:
Anorectal Disorders, Colon Cancer, Colorectal Surgery, Colostomy-sparing Surgery, Fecal Incontinence, Inflammatory Bowel Disease (IBD), Minimally Invasive Surgery, Rectal Cancer, Sphincter-Preserving Surgery

Alodia Gabre-Kidan, M.D., M.P.H.
Expertise, Disease and Conditions:
Anal Cancer, Colon and Rectal Surgery, Colonoscopy, Colorectal Cancer, Colorectal Surgery, Crohn's Disease, Diverticulitis, Fecal Incontinence, Hemorrhoid Surgery, Hemorrhoids, Rectal Problem, Ulcerative Colitis

Susan L Gearhart, M.D.
Expertise, Disease and Conditions:
Colon Cancer, Colon Surgery, Colorectal Cancer, Colorectal Disease, Colorectal Surgery, Constipation, Defecatory Dysfunction, Fecal Incontinence, Hereditary Colorectal Cancer, Inflammatory Bowel Disease (IBD), Obstructed Defecation Syndrome (ODS), Oncology, Pelvic Organ Prolapse, Rectal Surgery, Robotic Surgery, Sacral Nerve Stimulation, Slow Transit Constipation, Surgery, Surgical Oncology

Peter Anton Najjar, M.D., M.B.A.
Expertise, Disease and Conditions:
Abdominal Cancer, Colon and Rectal Surgery, Emergency General Surgery

Bashar Safar, M.B.B.S.
Expertise, Disease and Conditions:
Colon and Rectal Surgery, Colon Cancer, Colon Polyps, Colon Surgery, Colorectal Surgery, Crohn's Disease, Diverticulitis, Diverticulosis, Inflammatory Bowel Disease (IBD), Rectal Cancer, Rectal Surgery, Ulcerative Colitis
IBD Nurses

Elisheva (Ellie) Weiser, M.S.N., R.N., P.C.C.N.
Ellie is a board-certified registered nurse with a master’s degree in nursing from Stevenson University, with a concentration in health leadership and management. Ellie earned her bachelor’s degree in nursing at the University of Maryland. Ellie worked as a cardiac nurse prior to her current position as a clinical nurse in the Inflammatory Bowel Disease Center at Johns Hopkins. She also works directly with patients in the clinic’s infusion centers.