Dr. Grewal

is a board-certified physician of Internal Medicine.  He received his B.A. in cellular and molecular neuroscience from Johns Hopkins University and his M.D. from Rutgers – New Jersey Medical School. He then went on to complete his residency at Northshore-Long Island Jewish Hospital.

Dr. Grewal has a keen interest in preventing and treating disease holistically.  He takes great pride in helping his patients with weight loss, hormone optimization, and reversing diseases like Metabolic Syndrome and Type 2 Diabetes through diet and exercise.

When he’s not nerding out on the latest health research, he can often be found hanging from the only pull-up bar in Central Park.


  • Weight Loss
  • Nutrition Based Health Interventions
  • Paleo and Low-Carb Diets
  • Complex Medical Management
  • Home Visits
  • Hospital Care
  • Hormone Optimization


B.A. Johns Hopkins University, 2004
M.D. Rutgers – New Jersey Medical School, 2010
Residency in Internal Medicine – Hofstra North Shore-LIJ Health System

Professional Memberships

American College of Physicians (ACP)
Society of Hospital Medicine (SHM)

Dr. Alexandra Sowa

is a board-certified physician of Internal Medicine, specializing in obesity medicine.  She is a diplomate of the American Board of Obesity Medicine.   After graduating with honors from Johns Hopkins University, Dr. Sowa attended New York University School of Medicine, where she completed both medical school and a residency in Internal Medicine.   

Alexandra is honored to have been named one of four ‘Rising Star’ Super Doctors in New York City for Internal Medicine in 2017.

Outside of her practice she is a medical writer and media contributor.  She has published original articles on health related topics in publications like NPR, The Atlantic, Slate Magazine and the New York Daily News.  She has also served as an on-air health expert for national media outlets like Fox News, CBS News, NPR and Inside Edition.  Her medical opinions have been featured in various print publications, from the New York Times, U.S. News and World Report to Glamour and Parents Magazine.

She is also passionate about optimizing health through food.  You can often find her making healthy meals (and a mess!) for her husband and two young sons in the kitchen.


  • Medically Supervised Weight Loss
  • Nutrition
  • Women’s Health
  • General Internal Medicine


B.A. Johns Hopkins University, 2005
M.D. New York University School of Medicine, 2011
Residency in Internal Medicine – NYU School of Medicine


Board Certified, American Board of Internal Medicine
Board Certified, American Board of Obesity Medicine