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Dr. Adolfo Cuadra (Board Certified in Anesthesiology, Critical Care, and Pain Medicine)

Dr. Adolfo Cuadra is the medical director/owner of APS and has dedicated more than twenty years to helping patients find relief from pain and regain a better quality of life. He completed his residency in Anesthesiology & Critical Care Medicine and his fellowship in Pain Management at the University of New Mexico—a time that shaped both his skills and his deep appreciation for the art of caring for patients in pain.

He began his career in private practice in Louisiana in 2001, where he developed a reputation for listening closely, treating patients with kindness, and creating care plans tailored to each person’s needs. Dr. Cuadra believes that effective pain management starts with understanding the whole patient—not just their symptoms.

Today, he is proud to serve the communities of Gray, Morristown, and Knoxville, Tennessee. His practice focuses on evidence-based, innovative treatments delivered with compassion and respect. Dr. Cuadra considers it a privilege to walk alongside patients on their journey, offering guidance, support, and hope every step of the way.

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Tristan Villalobos, PA-C is a Physician Assistant with Associated Pain Specialists and cares for patients in our Knoxville office. Originally from Michigan, he completed both his bachelor’s degree in Kinesiology and his Master of Physician Assistant Studies at Central Michigan University.

Tristan chose a career in medicine because he genuinely enjoys connecting with people and helping them feel understood and supported. He believes in meeting patients where they are, taking the time to listen, and treating everyone with the same respect and care he would offer his own family.

When he’s not in the clinic, Tristan enjoys spending time with his family—especially his nieces and nephew, who keep him laughing. He and his girlfriend love getting outside with their dog, Koda, for walks, hikes, and the occasional unplanned adventure. Tristan is also an avid golfer and a big college football fan, proudly cheering for both the Tennessee Volunteers and his lifelong favorite, the Michigan Wolverines. Go Blue!

 

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Shannon Crawley, FNP-C is a Lenoir City native. She obtained her bachelor’s degree from King College in Knoxville Tn. She worked as an RN for five years in the emergency department while continuing her education obtaining her Master’s degree from Tennessee Tech University in Cookeville. She has been practicing as a Nurse Practitioner in pain management since 2018. Her goal is to provide safe and compassionate care to her patients. In her free time she is active in her church, loves reading, playing with her dog, and spending time with family and friends.

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Christine Leslie FNP-BC coming soon…

 

Professional Affiliations

coming soon…

 

Commitment to Excellence

coming soon…

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Marissa Madigan, FNP-BC is a board-certified family nurse practitioner. She completed her undergraduate nursing degree at St. John Fisher College in Rochester, New York, where she also earned a minor in Spanish for the Health Professions. Marissa later obtained both her Master of Science and Doctor of Nursing Practice degrees from the University of Rochester. Her doctoral work focused on developing a hybrid approach to medication management for patients with chronic conditions and addressing the barriers that often prevent them from receiving consistent, effective care.

Marissa began her career at Strong Memorial Hospital, a level-one trauma center, and more recently worked as a local travel nurse throughout the Knoxville area. These diverse experiences shaped her patient-centered approach and strengthened her commitment to building meaningful, collaborative relationships with the individuals she cares for. She is passionate about helping patients set realistic goals and supporting them in achieving the quality of life they deserve.

Outside of her clinical work, Marissa enjoys running, traveling, and spending time with her family. She is proud to be part of the team at Associated Pain Specialists and looks forward to partnering with her patients as they navigate their journey with chronic pain.

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Grace Parker FNP-C is a family nurse practitioner who is board-certified by the American Association of Nurse Practitioners. Grace earned her MSN from East Tennessee State University. She works to improve decision support for safe and responsible pain management and examines pharmacologic and nonpharmacologic interventions to improve safe practice and reduce risk. Her philosophy of care is everyone is deserving of high-quality care, no matter socioeconomic status, or cultural or religious background. She believes in building strong patient relationships to understand health goals and develop collaborative plans. Grace enjoys bringing a grounded, community-focused perspective to her practice.

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Matthew Grimm FNP-BC is a Nurse Practitioner with Associated Pain Specialist, bringing over six years of clinical experience in family medicine. He earned his BSN from the University of Tennessee, Knoxville, his MSN from Tusculum University, and is board certified by the American Association of Nurse Practitioners (AANP).

Matthew is known for a compassionate, patient-centered approach, emphasizing education, consistency, and long-term relationships as key components of effective care. Based in Gray, Tennessee, he enjoys time with his family, playing guitar, and board gaming, and serves as a music minister and student pastor at his local church.
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Jordan Snead PA-C coming soon…

 

Professional Affiliations

coming soon…

 

Commitment to Excellence

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Adam Johnson FNP-C moved to the TriCities area after graduating from Milligan College in 2001 with a Bachelor of Science degree in Biology. After working for several years at Johnson City Medical Center he returned to school to earn his Bachelors of Science in Nursing at ETSU. Although he found fulfillment in bedside nursing, after more than a decade of working in Home Hospice, ICU, and the Emergency Department, Adam once again returned to ETSU- this time to earn a master’s degree in nursing. After graduating in 2022 he earned his Family Nurse Practitioner certification and has worked in Family Medicine and Pain Management roles since then. In his free time Adam like to read, play table top games, and spend time with his children.

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D. Scott Thomas OTC, COA, COF, CI coming soon…

 

Professional Affiliations

coming soon…

 

Commitment to Excellence

coming soon…