Meet The Team

Dr. Nicholas Nguyen

Dr. Nicholas Trung Nguyen, MD, founder of Ageless Medical clinic – An Aesthetic and concierge medicine, is an Internal Medicine practitioner who received his undergraduate degree in Analytical Chemistry and Medical degree from East Carolina University – Brody School of Medicine. He then completed his Internal Medicine residency at Kansas University Medical Center in Kansas City, Kansas.

Dr. Nguyen has been living and practicing Medicine in Longview and Marshall, TX since 2010.  He enjoys being part of the community and feels privilege to be part of patients’ lives every day.

By limiting his practice to a set number of patients, Dr. Nguyen can practice medicine in a way that allows him to give each individual patient his undivided attention and time. It also allows him to practice in accord with his own personal philosophy of medicine which revolves around treating the whole person with a proactive, preventive approach. Rather than simply treating illness and disease with a pill, he works with his patients to discover their underlying causes of illness to achieve a steady state of wellness and health.

Twyla VanMeter

Twyla VanMeter has over 15 years in the aesthetic field and over 19 years in permanent cosmetics. She has added several certifications through the years including: LightSheer Infinity and Thermi Body Contouring Fractional Laser Treatments just to name a few. She values her educating clientele in the differnt procedures that can enhance their skin health. Result driven, she strives to reach the best possible results for her clientele.


Graduated from Kilgore College Nursing Program in 2014 as a Registered Nurse. Spent the last 3 1/2 years working at Christus GSMC-Marshall caring for the ill and post surgical. I am passionate about caring for others and helping them reach the goals they have set forth for themselves.

Jammie Knox

Jammie graduated from Kilgore College in 2013 as an Esthetician. She's been working as an esthetician/assistant in the medical spa industry for 5 years and specializes in eyelash extensions, skin care treatments, and waxing. "My favorite part about my job is helping people achieve significant results and seeing their transformations." Jammie also enjoys other spa treatments such as: facials, chemical peels, microdermabrasion, and many more. 

Mandie Dinh

Mandie comes to us with a very colorful background and wealth of experience. Along with a Bachelor of Sociology, her experience includes working in medical offices and hospitals for more than 10 years. She has covered anything from the front office to medical records, as a team leader/manager to help train and oversee daily activities. Mandie grew up in a self entrepreneur family so her business instincts and knowledge are beneficial and supportive to our team.