Jan Giang Nguyen, MD

Asmeen Bhatt, MD, PhD, attended the University of Mumbai in India, completing her medical degree in 2000. Dr. Bhatt earned her PhD in cell and molecular biology at Kent State University in 2006, going on to Canton Medical Education Foundation, Canton, Ohio, to complete her residency in 2008. She also completed a Gastroenterology fellowship at the University of Texas Medical Branch at Galveston in 2018. Patients see Dr. Bhatt for a wide variety of Gastroenterology concerns, including gastric reflux disease, difficulty swallowing, constipation or diarrhea, blood in the stool, and abdominal pain. She also provides colonoscopies for colon cancer screenings and help patients manage obesity. Dr. Bhatt joined Kelsey-Seybold in January 2025.

Jenna Maffei, MD, attended Baylor College of Medicine in Houston, first earning her Doctor of Medicine in 2019. She remained there to complete her internship and her Urology residency in 2020 and 2024, respectively. She treats a wide range of urologic conditions, including benign prostatic hyperplasia (BPH), kidney stones, bladder stones, kidney cancer, bladder cancer, prostate cancer, urinary tract infections (UTI), erectile dysfunction, and low testosterone. Her clinical interests include benign conditions such as stone disease and UTIs, along with kidney, prostate, and bladder cancers. Dr. Maffei joined Kelsey-Seybold as a urologist in September 2024.

Brian Yum, MD, attended New York Medical College in Valhalla, New York, earning his medical degree in 2017. He went on to New York Presbyterian/Weill Cornell Medical Center in New York City, where he completed his residency in 2020. Afterward, he completed a Cardiology fellowship at Texas Heart Institute in Houston in 2024. As a cardiologist, Dr. Yum's goal is to prevent, diagnose, and treat cardiovascular diseases so that his patients can be healthy enough to maximize doing things they love and spend more quality time with their loved ones. His clinical interests include general Cardiology and cardiac imaging such as echocardiography and cardiac CT scans. He joined Kelsey-Seybold in August 2024.