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Meet Our Team
Serving thousands of Texas men for over a decade, with over 45 years of combined dedicated experience in hormone optimization and men’s health among our lead providers, and over 50 years of combined experience as Clinic Directors - our obsession and commitment to provide the most individualized, comprehensive and results-driven care for men is stronger than ever.
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Krystyna Tran, FNP
Clinic Director | Houston Heights
Krystyna holds a national certification with the American Academy of Nurse Practitioners as a Board-Certified Family Nurse Practitioner. She began her career in health care working as a registered nurse in dialysis. Her passion to help others, allowed her to advance in her career and continue her education. Krystyna completed her Bachelor of Science in Nursing with honors at University of Texas and then earned her Master of Science in Nursing as a Family Nurse Practitioner graduated with highest honors at Chamberlain University. She is presently pursing a Doctorate in Nursing Practice at Purdue University. She is dedicated to providing the best patient care possible through listening to her patients and empowering them to take better care of themselves. In her spare time, she loves to travel, craft, and explore great eats.
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James Nguyen, APP
Clinic Director | Cypress, TX
James Nguyen is double certified as an Advanced Practice Practitioner, and as a Chiropractic Physician. He has advanced training in Neurosergery, Orthopedics and Interventional Pain Management - from Baylor College of Medicine and Houston Methodist. James also has extensive experience in Men's Health and Wellness, and is is an experienced provider in PRP Injections for Hair Vitality, Sexual Wellness and Joint Pain.
James joined the Men's T Clinic family in 2023 as our Cypress Location Clinic Director, excited to serve the local community by providing the best in Men's Total Wellness Care. James is "driven by the opporunity to enhance his patient's overall quality of life" through his experience, passion and through the comprehensive care and commitment offered to patients at Men's T Clinic.
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Nathan Muehlstein, PA-C
Clinic Director | Pearland, TX
Nathan Muehlstein was born and raised in Shiner, Texas. He graduated summa cum laude from Texas State University in San Marcos with a Bachelor of Health and Wellness Promotion degree and obtained his Master of Physician Assistant Studies degree from the UTMB School of Health Professionals. Prior to becoming a Physician Assistant, he was a medic in the US Army Reserves and a paramedic. His previous experience includes primary care/internal medicine for 3 years before starting his focus on hormone replacement for the last 2 years. Nathan prides himself on making his patients feel comfortable by educating them about their conditions as well as providing the highest level of medical care. Nathan is married to his beautiful wife Danica, and they enjoy spending time with their two pugs, Amos and Otis.
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Daniel Dao, FNP
Clinic Director | Pasadena, TX
Daniel Dao began his nursing career in 2014 with a Bachelor's of Science degree from Tarleton State University. Throughout his time as a bedside nurse, has accumulated had a wide variety of inpatient experience while working at the metropolitan hospitals in Austin, TX. While working in a fast-paced emergency department, he earned his Master's of Science in Nursing, specializing as a family nurse practitioner. Daniel has diverse background in primary care, as he was groomed by multiple physicians during his clinical training. He is particularly interested in men's health and is dedicated to combining hormone replacement therapy with lifestyle management in order to optimize his patients' quality of life. In his spare time, Daniel participates in powerlifting, works on his motorcycles, and hikes outdoors with his dogs, Winston and Armin.
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Shaun Mullen, PA-C
Clinic Director | Spring, TX
Shaun Mullen is a graduate from Stephen F. Austin State University where he earned a Bachelor of Science degree in Biology in 1987. In the same year, he attended the University of Texas Medical Branch at Galveston. He graduated from UTMB with a Bachelor of Science in Physician Assistant studies in 1989. He has been practicing medicine since 1989. Over that time, he spent 17 years in Orthopaedic Surgery. The last 7 years have been dedicated to hormone replacement, predominately in men. He truly believes that hormone replacement and wellness is the key to longevity. He always strives for the best outcomes for his patients and looks for ways to improve future care. When he is not working, he enjoys most outdoor activities and is an avid sports fan. He also enjoys spending time with his wife Jan, sons Ryan and Kyle, and two dogs Clifford and Clementine.
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Kelly Cook
Corporate Director of Operations
Kelly Cook is a seasoned Physician Assistant with over 22 years of experience in the medical field, including 15 years specializing in hormone replacement therapy (HRT). His HRT journey began at Coppell Family Medical Center and continued at the Low T Center, where he joined in 2010 during the early days of the testosterone therapy movement.At the Low T Center, Kelly played a pivotal role in the company’s rapid expansion—from a single clinic to more than 40 clinics nationwide within a few short years. His responsibilities included serving as a Center Director, developing treatment protocols, overseeing clinic operations, recruiting, and contributing to clinical research. Starting as a medical provider, Kelly advanced to become the National Quality Assurance Manager before his departure.
During his time there, Kelly co-authored three articles published in prominent medical journals. One notable piece, titled “Risks of Myocardial Infarction and Strokes in Men Treated with Testosterone: The Low T Experience,” was selected as late-breaking news by the American Association of Clinical Endocrinologists and featured as a poster presentation at the 2015 AACE Conference.In 2016, Kelly joined the Men’s T Clinic team, where he has continued his mission of delivering exceptional, patient-centered care. With a wealth of experience, he now helps train and mentor providers across the Men’s T Clinic system, ensuring the highest standards in care.
Kelly earned his undergraduate degree in Biology and Chemistry from Hardin-Simmons University, where he also played football and was named Academic All-Conference in two seasons. He later received his Master of Physician Assistant Studies from the University of North Texas Health Science Center.Outside of work, Kelly enjoys spending time with his wife—his college sweetheart—and their three wonderful children. He’s an avid outdoorsman who loves fishing, skiing, working out, and cheering on his kids in their sports activities.
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Erik Snook
Director of Operations - Houston
Erik Snook, PA-C, is a board-certified Physician Assistant with over a decade of experience helping men achieve optimal health through hormone replacement therapy (HRT), weight management, peptide therapy, and overall wellness. As an Army veteran and graduate of the Interservice Physician Assistant Program (IPAP). He earned his Master’s degree in Physician Assistant Studies from the University of Nebraska Medical Center.Erik’s career spans roles as a medical provider, clinic director, and corporate executive. His expertise includes testosterone replacement therapy (TRT), functional medicine, and weight loss strategies, paired with a deep understanding of patient care and clinic operations.
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Dr. Salvatore Campo
Corporate Medical Director
Dr. Salvatore Campo is Men's T Clinic's Corporate Medical Director - leading treatment plans, protocols and vision for Men's T Clinic, collaboratively, with the collective Men's T Clinic Medical Team. Dr. Campo has more than two decades of innovatively, safely and effectively treating Low T, and more - for men of all ages and stages of Hormone Optimization. Dr. Campo, a proud U.S. Veteran, earned his medical degree on a Navy scholarship from the University of Health Sciences in Kansas City, Missouri. He completed his residency in Anesthesia/Pain management from Yale University Medical School in 1995. Dr. Campo is in private practice as an Interventional Pain Specialist, and became the Founding Medical Director of the Men's T Clinic, at it inception, in 2013. Dr. Campo is a retired Navy captain and a veteran of both Desert Shield/Desert Storm and Iraqi Freedom.
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Experience
the Men's T Clinic difference.
the Men's T Clinic difference.
Trusted I Transformative I In-house Labs + Expert Analysis I Dynamic Optimization of Key Biomarkers That Matter Most to Men
In-tandem Therapies Under One Roof I Dedicated Providers I Always Individualized
In-tandem Therapies Under One Roof I Dedicated Providers I Always Individualized