Meet Our Surgeons

Dr. Jeremy W. Tarter is a graduate of Danville High School and Centre College. He graduated summa cum laude from the University of Louisville School of Medicine in 1994. He completed his residency in orthopedic surgery at Vanderbilt University in 1999. After a fellowship in Sports Medicine and Foot and Ankle surgery in Phoenix, Arizona, he returned to practice in his hometown of Danville in 2000. He has been certified by the American Board of Orthopaedic Surgery since 2002.

Dr. Tarter has been with DOSM and served this region his entire career. His practice is now concentrated in total joint replacement, with specialized emphasis on robotic total knees, computer navigation and anterior hip replacement. He also has an interest in both conservative and operative care of general orthopedic conditions including fracture care and hand surgery.

He has been married to his wife Shannon for over 30 years and they have two married sons.

Dr. Charles C. Key is from Williamsburg, KY. He graduated valedictorian from Williamsburg High School in 1998 and graduated summa cum laude from the University of the Cumberlands in 2002.

He graduated with high honors from University of Kentucky College of Medicine in 2007. He was commissioned into the US Army and completed his orthopedic surgery residency at Eisenhower Army Medical Center in Augusta, Georgia in 2012. He was then deployed to Afghanistan as an orthopedic surgeon in support of Operation Enduring Freedom. 

After deployment, Dr. Key returned to Kentucky at Fort Knox where he served as the chief of Orthopedics and Surgery at Ireland Army Hospital. He was certified by the American Board of Orthopaedic Surgery in 2014.  Dr. Key performs many general orthopedic procedures including shoulder/knee replacement, arthroscopic shoulder/knee surgery,  shoulder reconstruction, fracture care, and hand surgery.

He currently lives with his wife and daughter in Danville.

Dr. D. Jeffrey Covell was born in Frederick, Maryland. He attended Kansas State University and received a bachelor’s degree in Animal Science and Industry in 2004. He studied at the University of Kentucky College of Public Health and earned a master’s degree in 2006. He graduated summa cum laude from the University of Kentucky School of Medicine in 2010. Afterwards, he completed an internship and a residency in orthopaedic surgery at The University of Kentucky Medical Center (2015). 

Dr. Covell completed fellowship training at the OrthoCarolina Foot and Ankle Institute in Charlotte, NC in 2016. He is board eligible by the American Board of Orthopaedic Surgery for 2017.  

His primary area of concentration is in foot and ankle surgery with special interests in total ankle replacement, trauma, post-traumatic arthritic joint reconstruction and fusion, complex congenital or acquired foot deformity, Charcot reconstruction, tendon disorders, bunion and hammer toe correction, arthroscopy and sports related injuries.  

He is married and has one son.

Dr. R. Zackary Unger is a board-certified orthopaedic surgeon who completed fellowship training in sports medicine.  He grew up on his family farm near Wabash, IN.  After high school, Dr. Unger played collegiate golf at Morehead State University where he earned Summa Cum Laude Honors with focus in Chemistry and Biology.  He has completed his medical and orthopaedic training at the University of Kentucky where he gained extensive training dealing with a variety of musculoskeletal conditions. 

Dr. Unger has published several papers, a book chapter, and presented locally, nationally, and internationally.  His practice has a focus in sports medicine, but he also provides general orthopaedic care including trauma and fracture management, total joint replacement, hand procedures, as well as various nonoperative treatment options. 

During residency and fellowship training, Dr. Unger served as an assistant team physician for the University of Kentucky, working closely with UK Football and UK Men’s Basketball teams.  He has provided care for athletes of multiple sports teams at the collegiate and high school level.  Additionally, Dr. Unger has treated various professional athletes including those in the MLB, NFL, XFL, PGA, and WWE.  

His invaluable experience assessing athletes on playing fields, in training rooms, and in the UK Sports Medicine Clinic has prepared him to provide the same high level of care to our community.  Dr. Unger is the head team physician and team surgeon for Centre College and Campbellsville University Harrodsburg.  He also serves young athletes in our region working closely with area high schools.

Dr. Unger resides in Danville with his wife and three children.  In his free time, he enjoys spending time with his family, golfing, being outdoors, and watching a variety of sports and movies.

Dr. Unger finds it very rewarding to help others regain quality of life and get back to an active lifestyle.  He looks forward to meeting you and helping you achieve your goals.

Learn more about Dr. Unger and the services he offers at zackungermd.com

Jeremy Caudill, MSPAS, PA-C was born in Lexington, KY and raised in the hills of eastern Kentucky. He completed his undergraduate curriculum at the University of Kentucky where he was a varsity football player and later signed with two NFL teams. 

He returned to UK where he earned his Master of Science in Physician Assistant Studies degree. He is a board certified physician assistant who's passion for sports and medicine led him to a career in orthopedics. 

Jeremy lives in Jessamine Co. with his wife and two sons

Ashley Sachs, a Lexington, Kentucky native, has built her career on a strong foundation of education, experience, and a passion for patient care. She began her academic journey at the University of Kentucky, earning a Bachelor of Science in Animal Science in 2009. After a few years of working with animals, Ashley decided to shift her focus to human healthcare. She pursued her nursing degree at Eastern Kentucky University, graduating in 2013, and later earned her Master of Science in Nursing in 2019, becoming a Certified Nurse Practitioner.

Ashley discovered her passion for orthopedics while working in the University of Kentucky’s Foot and Ankle Division, where she honed her skills and developed a deep understanding of musculoskeletal care. In 2023, she joined Danville Orthopaedics and Sports Medicine, where she now specializes in general orthopedics, helping patients of all ages regain mobility and improve their quality of life.

Ashley lives in Danville with her husband, their three daughters, and three beloved dogs. Outside of work, she enjoys spending time with her family and staying active in her community.

Regina A. Motley, MSPT, ATC, is a skilled physical therapist and certified athletic trainer with deep roots in Mercer and Boyle County. She earned her degrees in Physical Therapy and Health Studies from the University of Kentucky and went on to complete a Master’s degree in Sports Medicine from the United States Sports Academy in Daphne, AL.

With a rich background as a Certified Athletic Trainer, Regina brings a unique blend of expertise in sports medicine and physical therapy to her practice.   Her experiences range from treating professionals and juniors in tennis at the Nick Bollettieri Tennis Academy (now IMG Academy) to the local high school and industrial athletes.

 She is passionate about providing exceptional care to athletes of all ages and skill levels, from young beginners to elite professionals. Her comprehensive approach to treatment emphasizes injury prevention, recovery, and optimizing performance, ensuring every patient receives personalized care tailored to their goals.

Deidra Breitenbach, PT, brings over three decades of experience and dedication to her physical therapy practice. Originally from Waverly, Ohio, Deidra earned her Physical Therapy degree from The Ohio State University and has been serving patients since 1991.

Her extensive background spans inpatient therapy, home health, and outpatient orthopedics, enabling her to treat a wide variety of diagnoses with expertise and care. Certified in Dry Needling, Deidra integrates advanced techniques into her treatments to help patients achieve their recovery goals efficiently and effectively.

Known for her compassionate and caring approach, Deidra has earned a reputation as a trusted and beloved therapist in the community. She lives in Danville with her husband and is the proud mother of two wonderful daughters.

Holli Hester Hoover, PT, DPT is a Central Kentucky local. She attended Western Kentucky University where she obtained her Bachelor’s Degree in Exercise and Sports Science while competing on the All-Girl Cheerleading team. Go Tops! She received her Doctorate of Physical Therapy degree from Bellarmine University where she completed her capstone in Neuromuscular disorders and the impact of physical activity. 

She is passionate and committed to being hands-on with her patients while teaching people an appreciation of taking care of their bodies through Physical Therapy and movement.  

Holli enjoys working with patients of all ages and aims to ensure optimal health and mobility across each phase of life! 

When away from the clinic, Holli appreciates spending time with her husband and loved ones, traveling and being outdoors. 

 Marcus Brown, PT, DPT, is a Danville, KY native with a strong commitment to improving patients' quality of life through physical therapy. He completed his undergraduate studies in Biology at Western Kentucky University before earning his Doctorate of Physical Therapy from Bellarmine University. Marcus is dedicated to helping others regain mobility and strength, providing exceptional care to every patient he serves. 

He resides in Harrodsburg, KY with his wife and son. 

Sarah Lynn Noland, PTA, completed the Physical Therapist Assistant Program at Somerset Community and Technical College with an Associate of Applied Science degree in May 2018. 

Sarah’s love for sports and orthopedic rehabilitation began in Middle and High School at Lincoln County where

she played multiple sports, specifically basketball and tennis. She served our great country in the Kentucky Army National Guard from 2009 until 2019 while she obtained her Bachelor’s degree of Science in Education/Kinesiology from the University of Kentucky in May 2016. 

Sarah has been practicing at DOSM PT since 2018 while she enjoys treating a variety of conditions and orthopedic rehabilitation with a passion for manual therapy interventions. She progressed

her training with instrument assisted soft tissue mobilization (IASTM) by obtaining her FMT Blades and FMT Blades Advanced certifications from Rocktape. Sarah is passionate about sports medicine and helping others regain their quality of life.

While not in the clinic, she enjoys spending time with her family at their residence in Hustonville, KY taking care of their mini farm, spending time outdoors, going on adventures, watching and playing a variety of sports and dirt track racing.

Chelsea Reed, PTA, is a Richmond, Kentucky native with a lifelong passion for sports and movement. A former soccer and tennis player at Madison Central High School, Chelsea developed an early appreciation for physical activity and athletic performance. She earned her Bachelor of Science in Biology from Western Kentucky University in 2015 and began her career in healthcare as a Physical Therapy Technician at a sports clinic in Lexington.

Inspired by her work with patients and her love for helping others recover and thrive, Chelsea pursued further education in physical therapy. She graduated from the Physical Therapist Assistant (PTA) program at Somerset Community College in May 2022.

Chelsea is dedicated to providing compassionate, results-driven care, helping patients achieve their goals and regain their strength and mobility.