Our Physicians


Medical Director: Mark T. Malone, M.D. ›

Mark T. Malone, M.D., is a Board Certified pain specialist and a native Texan. He received his undergraduate degree from the University of Texas at Austin, and went on to attend the University of Texas Southwestern Medical School. Dr. Malone attended Baylor College of Medicine for residency and training in anesthesiology, and then completed a pain management fellowship at Texas Orthopedic Hospital in 1998.

Prior to founding Advanced Pain Care in 2002, Dr. Malone was a member of an Austin-based group practice for twelve years, and a clinical instructor at Baylor College of Medicine for six years. He is double board-certified in anesthesiology and pain management by the American Board of Anesthesiology, with a sub-specialty in pain management; this is the only board certification for pain management endorsed by the American Board of Medical Specialties.

Dr. Malone is a member of the American Medical Association, the American Society of Anesthesiologists, the International Spinal Intervention Society, the American Society of Interventional Pain Physicians, and the Travis County Medical Society. He has successfully treated thousands of patients suffering from acute and chronic pain. He and his wife, Tracy, live in Austin with their three children. In his spare time, he enjoys water-skiing, cycling, and travel.


Amanda Trout, D.O. ›

Dr. Amanda Trout is an Anesthesiologist and fellowship-trained Pain Management physician. Originally from Anchorage, Alaska, Dr. Trout graduated from the University of Alaska with a Bachelor of Science in Biological Sciences. Dr. Trout received her Doctorate of Osteopathic Medicine from Touro University College of Osteopathic Medicine in Vallejo, California. She studied Anesthesia at Henry Ford Hospital/Wayne State University in Detroit, Michigan and

went on to complete her Interventional Pain Management fellowship at the University of Toledo Medical Center in Toledo, Ohio.

Dr. Trout is trained in spinal cord stimulation, intrathecal pump management, and various pain management techniques. She is a member of the North American Neuromodulation Society, the American Society of Regional Anesthesia and Pain Medicine, American Society of Anesthesiology, American Academy of Osteopathy, and the American Diabetes Association.

In her spare time, Dr. Trout enjoys spending time with my family, organic gardening, Tai Chi, fishing, camping, hiking, and crocheting and she is so excited to join the Amarillo community.


Andre Chen, M.D. ›

Dr. Andre Chen is a Board Certified Addiction Medicine specialist in Austin, TX. Originally from Maryland, he earned his undergraduate degree at the University of Texas at Austin, Doctor of Medicine at the University of Maryland, and Masters of Business Administration at the University of Texas at Austin. His completed his residency training at the Central Texas Medical Foundation (Brackenridge Hospital) in Austin.

Prior to becoming an Addiction Medicine specialist, he practiced Family Medicine at the Austin Diagnostic Clinic for over 20 years and was listed in Austin Monthly magazine as a Top Doctor in 2015 and 2017. He is board certified by the American Board of Addiction Medicine (ABAM) and American Board of Family Medicine (ABFM). As an avid software developer, he has developed several clinical apps in the iPhone/iPad App Store.

Dr. Chen focuses on substance use disorders as medically treatable conditions in the same way that diabetes or hypertension are. His primary goal at Advanced Pain Care is to ensure that patients with chronic pain conditions can safely and effectively receive the best treatment possible. If you feel that medication or substance use has taken over your life or that you have lost control then it may be time to consider effective medication-assisted outpatient treatment with an Addiction Medicine physician.

Dr Chen is here to help patients who suffer from loss of control of opioid pain medication, compulsive use of pain medication, craving pain medication, overdose, problem drinking, nicotine use.


Arif Ahmed, M.D. ›

Arif Ahmed, M.D. is a Board Certified Internist and Board Certified Rheumatologist. Originally from Houston, Texas, Dr. Ahmed graduated from Texas A&M with a Bachelor of Arts in Biology and a Bachelor of Science in Economics, with a minor in Chemistry. He briefly lived in Georgetown, Texas where he was part of the Mens Tennis Team at Southwestern University. He completed medical school at Ross University in Dominica West Indies. He then completed his internal medicine residency and was a Chief Resident at Good Samaritan Hospital in Cincinnati, Ohio. Prior to completing his fellowship in Rheumatology at the University of Missouri, he practiced as a Hospitalist at Indiana University. Dr. Ahmed has delivered several presentations at national meetings. In his spare time, he enjoys playing tennis, mountain biking, hiking, cheering for the Texas Aggies, and traveling. He is also fluent in Urdu, and proficient in Spanish. If you have questions, contact us to speak to our team of specialists and Dr. Ahmed.


Allen Dennis, M.D., M.S. ›

Allen L. Dennis is a Board Certified Pain Management and Anesthesiology physician residing in Austin, Texas. Dr. Dennis graduated from The School of Medicine at The University of Texas Medical Branch in Galveston, TX in June 2005. He received his graduate degree in Chemistry with an emphasis in Biochemistry from Texas Tech University in Lubbock, TX and his undergraduate degree in Chemistry from Lubbock Christian University in Lubbock, TX in 1999.

Before joining Advanced Pain Care, Dr. Dennis most recently worked in pain management at the Center for Spine Care in Dallas, TX. While working in the Dallas/Ft. Worth area, Dr. Dennis received the Patient’s Choice Award as well as the Five Star Service Award from Baylor Regional Medical Center at Grapevine. Dr. Dennis is a member of the Texas Medical Association, Texas Society of Anesthesiologists, among other medical professional associations. He specializes in comprehensive pain management including chronic headaches, spinal pain, neuropathy, and cancer pain. His goal is to provide his patients with the maximum quality of life possible.

Dr. Allen Dennis is a proud Texan who loves being in Central Texas. He is married with three children, and his daughter and two sons are actively involved in band. In his free time, Allen enjoys kayaking, boating, and enjoying wildlife.

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Brad Culling, D.O. ›

Brad Culling, D.O., is a Board Certified Anesthesiologist and Pain Management physician. Originally from Albuquerque, New Mexico, Dr. Culling graduated from Southwestern University in Georgetown, Texas with a Bachelor of Arts in Biology. While at Southwestern University, he was an integral member of the men’s baseball team. He completed Osteopathic medical school at Nova Southeastern in Ft. Lauderdale, Florida graduating at the top of his class. He went on to complete his residency training in Anesthesiology at the University of New Mexico where he served as the chief resident of his program. Dr. Culling spent an additional year of training at the University of Texas in San Antonio in a multidisciplinary pain fellowship program.

Dr. Culling has been trained in all facets of chronic pain medicine. He understands that chronic pain is a complex disease process that can affect many aspects of a person’s life. He is trained in multiple interventional pain techniques including spinal cord stimulation, intrathecal pumps, sympathetic blocks, joint injections, head and neck blocks, epidural injections, and ultrasound guided peripheral nerve blocks.

In his spare time Dr. Culling enjoys exercising, golfing, spending time with his friends and family, and playing with his dogs.


Craig Du Bois, M.D. ›

Advanced Pain Care is proud to introduce Dr. Craig Du Bois to our multispecialty approach to pain management. Dr. Du Bois is a Board Certified Neurologist that has spent more than 20 years focusing on the clinical evaluation and interventional treatment of unresolved, complex pain problems. He was one of the first full time pain management physicians in the Austin area beginning in 1992. Dr. Du Bois believes in a multimodality approach when constructing treatment plans and above all, being an advocate for his patients. In addition to practicing medicine, Dr. Du Bois has consulted with multiple pharmaceutical, biological and Biomedical equipment companies in product development, usage and education.

Dr. Du Bois focuses on difficult to treat conditions such as peripheral nerve pain, facial pain, neuromas, dystonia and migraines.

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Mark S. White, D.O. ›

Dr. White graduated with honors from Southwestern University in Georgetown, Texas where he earned a Bachelor of Science degree in Biology. He earned his Doctor of Osteopathy degree from The University of North Texas Health Sciences Center/Texas College of Osteopathic Medicine in Ft. Worth, Texas. He then completed his internship at Rocky Mountain Hospital followed by the completion of residency training in Anesthesiology at The University of Colorado Health Sciences Center in Denver, Colorado. He later completed the Medical Acupuncture program through The University of California at Los Angeles. He is board certified in Anesthesiology and Pain Medicine.

Dr. White is a member of the American Academy of Pain Management, the International Spine Intervention Society, the International Neuromodulation Society, the Texas Medical Association, the Travis County Medical Society, and the Texas Pain Society Board of Directors. He is a past President of the Texas Osteopathic Medical Association – District 7, and the Austin Pain Society, the local chapter of the Texas Pain Society. He has practiced Anesthesiology and Pain Management in the Austin area since 1983 and lives with his wife, Christine, who is a Licensed Massage Therapist.


Rizwan Khan, D.O. ›

Dr. Rizwan Khan is a Board Certified Anesthesiologist and Board Certified Pain Management doctor. He received his doctorate from University of North Texas Health Sciences Center in Fort Worth, Texas. He completed his residency in Anesthesiology at the University of Texas at Houston, which is part of the Texas Medical Center. The University of Miami was where Dr. Khan went on to do his Pain Management fellowship.

Dr. Khan recently moved from a thriving practice in Houston to work in the Greater Waco area. While in Houston, Dr. Khan was recognized as a “Top Doc” in Anesthesia and Pain Management by the Houstonia Magazine.

Dr. Khan’s interest in pain management and anesthesia started shortly after high school while serving in the U.S. military. Helping people live more functional and productive lives is why Dr Khan loves being a Pain Management physician. In his spare time, he enjoys traveling and spending time with his family.


Ryan Michaud, M.D. ›

Ryan Michaud is a Board Certified physician in Anesthesia and Pain Management and did his Interventional fellowship at the University of Utah in Salt Lake City. He received his medical diploma from the University of Texas Health Science Center at San Antonio in 2006. He completed his Anesthesia Residency at the University of New Mexico in Albuquerque from 2006 to 2010. Before joining Advanced Pain Care, Dr. Ryan Michaud worked in a private practice in Salt Lake City, Utah. He is a member of the American Society of Regional Anesthesia and Pain Medicine, American Pain Society, International Society of Interventional Pain, American Society of Anesthesiologist and Texas Medical Association.

Dr. Michaud was a registered nurse for several years before starting medical school. In his own words, “I took somewhat of a scenic route to becoming a physician, but also an important one. It’s one that I know was instrumental in helping me become a more compassionate and caring physician towards my patients. I really wish there was a magical pill or surgery that would take away all chronic pain. Sadly it’s not here yet. My guarantee to you, as our patient, however, is to use my training, skills and knowledge to help decrease your pain, improve your function and your quality of life.”