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MEET THE TEAM

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Internal Medicine

Anil Nachnani, MD 

Dr. Nachnani is Board-Certified in Internal Medicine. His practice encompasses all aspects of primary care and he serves as primary care physician for his patients. His special interest is high blood pressure management and he is the only American Society of Hypertension certified specialist in Sumner County. Dr. Nachnani, his wife and three children live in Nashville. He enjoys tennis, wine tasting and outdoor activities in his spare time.

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Family Medicine

Dr. Henry S. Lau is a Family Doctor, who primarily practices in Gallatin, TN. He received his medical degree from University of Tennessee Health Science Center College of Medicine in 2000 and has been in practice for more than 20 years. Dr. Henry S. Lau has expertise in treating Hypertension, Arthritis, Bronchitis, among other conditions.

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Family Practice 

Brian Stuart, MD

Dr. Brian Stuart is a Family Doctor, who primarily practices in Gallatin, TN. He is board certified by the American Board of Family Medicine. Dr. Stuart graduated from Saint Louis University School of Medicine and completed his residency at Naval Hosp-Jacksonville, Family Medicine. Dr. Stuart is currently seeing new patients. 

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Internal Medicine

Marshall R. Johnson, MD

Dr. Marshall Johnson has been serving the Hendersonville community for more than 25 years as a trusted physician specializing in Internal Medicine. A graduate of the University of Kentucky College of Medicine (Class of 1994), Dr. Johnson is Board-Certified in Internal Medicine. Patients appreciate Dr. Johnson’s approachable style, thorough evaluations, and dedication to helping them understand their health and treatment options. He is accepting new patients. 

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 Neurologist

Megan Mason, MD

Dr. Mason grew up in Murfreesboro, TN, and attended Transylvania University in Lexington, KY, where she earned a Bachelor of Science degree in Biology. She earned her MD from the University of Louisville School of Medicine. She completed her residency in neurology at the University of Kentucky College of Medicine. In 2010, she received her board certification in neurology from the American Board of Psychiatry and Neurology.

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Gastroenterology

Mark Uhl, MD

Dr. Mark Uhl, MD is a gastroenterology specialist in Gallatin, TN and has over 18 years of experience in the medical field. Dr. Uhl has extensive experience in Esophageal Disorders. He graduated from University of Iowa Carver College of Medicine in 2005. He is affiliated with medical facilities Tristar Hendersonville Medical Center and Sumner Regional Medical Center. He is accepting new patients.

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Pulmonology

Dr. William T. Faith is a pulmonologist and received his medical degree from University of Louisville School of Medicine and has been in practice for more than 20 years. Dr. William T. Faith has expertise in treating sleep apnea, asthma, bronchitis, among other conditions. 

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 FAMily practice 

Jordan Shirley, MD

Dr. Jordan Shirley is an Osteopathic Physician with clinical focus areas in women’s health, preventive medicine, and obesity medicine. She is board certified in Family Medicine and Obesity Medicine and is committed to delivering evidence-based, comprehensive care to support long-term health and well-being with a patient-centered approach. Originally from Alabama, Dr. Shirley resides in Hendersonville, Tennessee with her husband and pets. Outside of her professional work, she enjoys traveling and experiencing new cultures. Dr. Shirley is currently accepting new patients and is dedicated to partnering with individuals seeking to improve and maintain their health.

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110 Street Blaise Rd #200

Gallatin, TN 37066

Mon–Thu: 5pm | Fri–Sat: 7pm 

Sun: 9am-3pm

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© 2026 by Sumner Medical Group 

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