• We are open and encourage patients to schedule appointments, but please let us know over the phone if you have recently been to high risk areas or in contact with a known COVID-19 patient.
  • We are trying to keep the office a “safe zone” from the COVID-19

Thanks for your understanding.


(830) 626-1200


Lonestar Medical

Family Medicine located in New Braunfels, TX

Jay L. Gruhlkey, MD is a leading family care physician practicing at Lonestar Medical, located in New Braunfels, Texas. Dr. Gruhlkey provides thorough allergy testing and treatment, nutritional counseling, treatment for diabetes, high cholesterol, and minor office procedures. He also provides primary care services and DOT physicals and FAA Medical Exams.

Dr. Gruhlkey earned his medical degree at the University of Texas Medical School at Houston and has been in practice since 2001. Dr. Gruhlkey and his staff are dedicated to serving their patients with compassionate and effective care. Patients of all ages benefit from his thorough approach to allergy testing and treatment, helping them to live more active and healthier lives.

If you suspect that you or your child may have an allergy, make an appointment with Dr. Gruhlkey for allergy testing and care. Dr. Gruhlkey will be your partner in protecting and improving your health and wellbeing. Dr. Gruhlkey and the team at Lonestar Medical, in New Braunfels, Texas look forward to meeting new patients. Most major forms of insurance are accepted.

Dr. Jordan Williams, MD

Family Medicine located in New Braunfels, TX

Jordan C. Williams, MD is a Family Physician from Longview, TX. He completed his medical training at Saint Matthew’s University School of Medicine and completed his residency at the rural branch of the University of Cincinnati. He believes the patient-provider relationship is essential for effective and compassionate care. Dr. Williams treats many chronic and acute diseases, performs minor office procedures and provides primary care counseling as well. He worked in Sarasota, Florida providing primary and urgent care and recently provided primary care for the United States Air Force in San Antonio, TX. 

Dr. Williams is very dedicated to his patients while providing a comfortable, approachable and ethical milieu to aid his patients during visits. Dr. Williams is a member of the church of Christ and enjoys sports, cooking, playing and listening to music and spending time with family and friends

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Dr. Calvin W. Plumb, DC

Chiropractor located in New Braunfels, TX

Calvin W. Plumb, DC, is a skilled chiropractor and 2005 graduate of Parker College of Chiropractic. He brings his clinical expertise in biomechanics, manipulation, dry needling, and soft tissue therapy to provide conservative, non-invasive, and effective treatment of acute musculoskeletal injuries, postural abnormalities, and chronic pain for patients of all ages. Dr. Plumb serves the community of New Braunfels, Texas, at Lonestar Medical. 

Dr. Plumb has served as a Texas Designated Doctor since 2012. In 2018 Dr. Plumb was appointed to the Texas Worker’s Compensation Medical Quality Review Panel. In addition, Dr. Plumb serves as a Subject Matter Expert for the Texas Department of Insurance Division of Worker’s Compensation. Dr. Plumb is a member of the TDI faculty providing education to both chiropractors and medical doctors in the Worker’s Compensation system.

Dr. Plumb is an avid fly fisherman, hunter, leather crafter, and barbeque cook. He enjoys scuba diving with his wife Sandra and spending quality time with his two dogs, Daisy and Wyatt, as well as his two cats, Audrey and Olivia.

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Our Team

  • Jan Dubensky is a Certified Physician Assistant who was born and raised in central Texas. She received her Bachelor's Degree in Nutrition from the University of Texas at Austin, and attended Rutgers University in New Jersey to obtain her Masters in Physician Assistant Studies. She began her career working in San Antonio and subsequently made her transition to a healthcare provider for Lonestar Medical. She is also a member of the Texas Academy of Physician Assistants. 

    Jan thoroughly enjoys practicing in the Family Medicine realm; a key component is establishing and maintaining valued patient-provider relationships. She strives to play an active role in preventative medicine (including well-woman exams), but also contributes to acute visits, managing chronic conditions (high blood pressure, diabetes, etc.), and performing in-office procedures. Jan displays good communication, empathy, and passion for the field of medicine to be an integral part of her patients' entire well-being 

    Outside of work, Jan enjoys hunting, fishing, spending time with family, and enjoying all that the hill country has to offer. 

  • Susanne Brandt is a Family Nurse Practitioner who was born in San Antonio, Texas. She spent a great deal of time traveling the world and returned home to San Antonio in 1993. She received her Bachelor’s of Nursing from the University of Texas, El Paso, and received her Masters in Nursing-FNP from Texas A&M, Corpus Christi and is board certified by the American Academy of Nurse Practitioners.  It is from her thirty years of nursing experience that she has gained a vast knowledge in the nursing profession.

    Having worked in various health care positions, Sue finds she fully enjoys practicing in the Family Medicine setting. She believes in building a long lasting relationship with the patients and their families.  As a healthcare provider for Lonestar Medical Sue practices preventative medicine such as well-woman exams, manages chronic conditions such as high blood pressure and diabetes.

    When Sue is not working or traveling, she enjoys spending time with her four grandkids exploring museums, art exhibits, and musical performances. 

Choose Your Provider


Lonestar Medical accepts most major insurance. If you have any questions about your eligibility or coverage, please call our office. We are happy to help you!

Blue Cross Blue Shield
First Health
Humana Choice Care
Humana ChoiceCare Network PPO
United Healthcare
Lonestar Medical
952 Gruene Road, Suite 150
New Braunfels, TX 78130
Phone: 830-203-6198
Fax: (830) 626-9922
Office Hours

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