Dr. Thomas J. Castellano

Dr. Diehl is a board-certified and fellowship-trained gastroenterologist. His clinical interests include endoscopic ultrasound, endoscopic retrograde cholangiopancreatography (ERCP) and innovative advanced therapeutic endoscopy. Dr. Diehl obtained his medical degree from the University of California, Los Angeles. He completed his residency at Harbor-UCLA Medical Center and his fellowships in gastroenterology at the University of California, San Francisco Medical Center and the University of California, Los Angeles Medical Center. Dr. Diehl is certified by the American Board of Internal Medicine. In his free time, Dr. Diehl enjoys spending time with his family and exercising, particularly swimming. He also has an appreciation for old cars. Dr. Diehl is highly rated in 27 conditions, according to our data. His clinical expertise encompasses Barrett Esophagus, Gallbladder Disease, Watermelon Stomach, Endoscopy, and Gallbladder Removal. Dr. Diehl is board certified in The American Board Of Internal Medicine. Dr. Diehl is currently accepting new patients.

Dr. Still is a board-certified and fellowship-trained specialist in nutrition and weight management. His clinical and research interests include malnutrition and comprehensive weight management. Dr. Still obtained his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his residency and a fellowship in clinical nutrition at Geisinger Medical Center. Dr. Still is certified by the American Board of Internal Medicine.|Are weight loss medications right for you? Learn more from Dr. Still. Dr. Still is highly rated in 8 conditions, according to our data. His clinical expertise encompasses Obesity, Malnutrition, Small Bowel Bacterial Overgrowth, Gastric Bypass, and Knee Replacement. Dr. Still is board certified in The American Board Of Internal Medicine. Dr. Still is currently accepting new patients.

Philosophy of care | My philosophy centers on you, your personal needs and unique health journey. I believe in a collaborative approach, empowering patients with knowledge and being actively involved in treatment decisions. Whether managing chronic liver disease, guiding someone through a transplant process or offering preventive care, I create a compassionate and supportive environment where you feel heard and cared for. | Why I entered medicine | I chose a medical career to make a positive impact on people’s lives, especially in the realm of complex diseases like liver conditions, where treatment requires a balance of medical expertise and empathy. Liver disease, in particular, often affects individuals and their family in profound ways, and I find it incredibly rewarding to help patients navigate their care, from diagnosis to advanced treatments like a transplant. | Personal interests | I enjoy cooking and traveling, as well as time with family and close friends. I believe in maintaining a healthy lifestyle with proper eating and regular exercise. I'm also committed to finding a balance between work and personal life. Dr. Peyton is highly rated in 52 conditions, according to our data. His clinical expertise encompasses Hepatitis C, Primary Biliary Cholangitis, Hepatitis, Endoscopy, and Gastrectomy. Dr. Peyton is board certified in American Board Of Internal Medicine - Gastroenterology and American Board Of Internal Medicine - Internal Medicine. Dr. Peyton is currently accepting new patients.