Physician Partners
Your care comes first
Sometimes making sure you receive the best care means finding others who are better suited to help you. At HIRT, our mission is to make sure you get the care you need — so we’ve partnered with some of the best physicians in the Houston area.
Dr. Eric Berkman, MD
Orthopedic Surgery · Knee, Shoulder, & Joint Replacement
Board-certified, fellowship-trained orthopedic surgeon specializing in knee and shoulder surgery. Having undergone four knee surgeries himself, he brings a valuable patient’s perspective to care and finds restoring patients’ mobility so they can resume daily activities deeply rewarding.
Dr. Paul Shupe, MD
Orthopedic Surgery · Sports Medicine
Orthopedic surgeon and sports medicine specialist performing complex knee cartilage restoration, meniscus transplants, osteotomies, and revision surgeries. He treats high school, college, professional, and recreational athletes.
Dr. Jacel Brooks, MD
Non-Operative Sports Medicine
Board-certified, non-operative sports medicine physician offering advanced ultrasound-guided procedures, regenerative treatments, and personalized care to relieve pain and restore movement — helping patients recover faster and avoid unnecessary surgery.
Dr. James Gregory, MD
Orthopedic Surgery · Shoulder & Elbow
Orthopedic surgeon specializing in shoulder and elbow surgery, including rotator cuff repair, instability reconstruction, and care for the overhead athlete. He focuses on helping patients regain function and improve their quality of life.
Dr. James Showery, MD
Orthopedic Surgery · Spine
Orthopedic spine surgeon specializing in minimally invasive spine surgery, degenerative spine disease, spinal stenosis, adult spinal deformity, and spine injuries in athletes.
Dr. Kathy Nguyen, MD
Family & Sports Medicine
Board-certified in family medicine and sports medicine, treating patients ages 6 and up. She provides care for sports-related injuries, joint injections and ultrasound-guided procedures, wellness and preventive medicine, and chronic conditions.
Patricia Zamora, FNP
Men’s Health & Longevity
MSN, FNP-C. A hormone specialist and health guide with over 20 years helping people rebuild energy, strength, and confidence. She focuses on men’s total health optimization — hormones, habits, sleep, and performance — through personalized, evidence-based coaching.
Dr. Omar Dimachkieh, MD
Orthopedic Surgery · Hand & Upper Extremity
Fellowship-trained, board-certified orthopedic surgeon specializing in surgery of the hand and upper extremity, with an emphasis on disorders of the hand, wrist, and elbow — offering advanced minimally invasive and reconstructive techniques as well as non-surgical care.
Dr. Michael Greaser, MD
Orthopedic Surgery · Foot & Ankle
Board-certified, fellowship-trained orthopedic surgeon specializing in foot and ankle surgery, with an emphasis on minimally invasive and arthroscopic treatment of foot and ankle disorders. He builds individualized treatment plans around each patient’s condition and goals.