Meet the Staff at GI Solutions


Experts in Digestive Health Care in Chicago, IL

All our professionals at GI Solutions maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in gastroenterology.

  • Physicians
  • Anesthesiologists
  • Nurse Practitioners
  • Registered Nurses
  • Medical Assistants
  • Receptionist
  • Administrative staff

Arun Ohri, M.D.

Arun Ohri, MD

A board-certified gastroenterologist, Dr. Arun Ohri is a pioneer of the latest medical technological advancements in the field of gastroenterology. He was the first physician outside of clinical trials to employ the “Smart Pill” GI monitoring system and one of the first gastroenterologists in the Chicago area to utilize the Barrx and TIF procedure. Dr. Ohri has been named as one of Chicago’s top doctors by Castle Connelly Medical Ltd. for the past 14 years and is highlighted in the Consumer Research Council of America’s edition of “America’s Top Physicians.”

He earned his medical degree from Maulana Azad Medical School, University of Delhi, New Delhi, India. He was chief resident of Internal Medicine and conducted his fellowship in Gastroenterology at Cook County Hospital, Chicago.

View Dr. Arun Ohri’s CV


Paul Fahrenbach, M.D.

Paul Fahrenback, MD

Dr. Paul Fahrenbach received board certification in internal medicine in 1992 and board certification in gastroenterology in 1993. Dr. Fahrenbach graduated from the University of Illinois Chicago College of Medicine (UIC) in 1987. He completed his internal medicine residency program at UIC in 1990, and completed his fellowship in gastroenterology at UIC in 1992.

View Dr. Paul Fahrenbach’s CV


Veena Nannegari-Khiani, M.D.

Dr. Nannegari-Khiani completed her residency in Internal Medicine and fellowship in Gastroenterology at Albany Medical Center in New York. Dr. Nannegari-Khiani also completed an advanced fellowship in Inflammatory Bowel Disease at the University of Chicago, and enjoys General Gastroenterology as well. She is currently Board Certified in Internal Medicine and Board Eligible in Gastroenterology. She has given grand round presentations at university and community hospitals. She is published in several journals, including Gastrointestinal Endoscopy, Practical Gastroenterology and Gastroenterology & Hepatology. Dr. Nannegari-Khiani has been a presenter at the 21 st Annual Patient and Family Education Symposium for the Crohn’s and Colitis Foundation of America.

View Dr. Nannegari-Khiani’s CV


Stanislaw A. Maslanka Jr., M.D.

Dr. Maslanka has practiced general medicine and gastroenterology for over 30 years. When working with a new case, Dr. Maslanka strives to look at the patient as a whole person and not just a stomach or colon. He will try to listen carefully and focus on your illness as well as your overall health.

Simi Jesto Joseph, DNP, APN, NP-C

Simi Jesto Joseph, DNP, APN, NP-C

A board-certified Nurse Practitioner, Simi Jesto Joseph assists physicians with highly advanced endoscopic procedures, including ablation treatment, TIF and endoscopic GERD therapy. She is experienced in administering and interpreting the PH monitoring system, Manometry, PH impedence study, small bowel capsule endoscopy,  smart pill, and ESO pill monitoring systems. Dr. Joseph provides treatment to patients with GI conditions in acute care and outpatient clinic settings. Her area of interest is Inflammatory Bowel Disease and Hepatitis C treatment. She received her Bachelors of Science in Nursing from MAHE University, India and her Masters of Science in Advanced Practice Nursing from North park University, Chicago, and Doctor of Nursing Practice degree from Loyola University, Chicago.  She is committed to the evidence-based quality treatment outcome of all patients in this practice.

View Simi Joseph’s CV