Physical Medicine and Rehabilitation Faculty

Kelley Crozier

Kelley Crozier, MD MBA Chair

Chair, Department of Physical Medicine and Rehabilitation

Dr. Crozier is a graduate of Hahnemann University School of Medicine who went on to complete her residency at Thomas Jefferson University Hospital. She advanced to become a Chief Resident and then the first female Vice Chair at Jefferson. She remained as a full-time faculty member there until 2002 when she came to Reading Hospital as section chief, later growing PM&R into a full department and becoming the hospital’s first PM&R Chair. Dr. Crozier has also achieved her MBA from Alvernia University in Reading, PA. Board certified in Physical Medicine and Rehabilitation and Electrodiagnostic Medicine, Dr. Crozier is also a Clinical Assistant Professor of medicine at the Sidney Kimmel Medical College at Thomas Jefferson University. Dr. Crozier’s professional interests include the rehabilitation of patient with traumatic injuries and medically complexities. Neurorehab and Parkinson Disease are further areas of her expertise where she also works in the Parkinson’s clinic with our Movement Disorder neurologist and the interdisciplinary team. Dr. Crozier can be heard throughout the halls of the hospital whistling and during her time at home she enjoys gardening.

John Sheffield

Somkiat Hemtasilpa, MD

Program Director, Physical Medicine & Rehabilitation

Born and raised in Bangkok, Thailand Dr. Hemtasilpa received his medical degree from Phramongkutklao College of Medicine then went onto finish his Physical Medicine and Rehabilitation Residency at Phramongkutklao Hospital in Bangkok. After finishing residency in Thailand Dr. Hemtasilpa became an International Medical Graduate at SUNY Buffalo Graduate Medical-Dental Education Consortium Program where he later graduated from their Physical Medicine and Rehabilitation Residency program. He went on to complete a Spinal Cord Fellowship at Virginia Commonwealth University Medical College of Virginia and VA Medical Center. In addition, he is also sub-specialty certifies in Pain Medicine, Electrodiagnostic Medicine and Spinal Cord Medicine. Dr. Hemtasilpa then returned to Bangkok where he served as a Lt. Colonel in the Royal Thai Army Hospital for five years. While enlisted, he worked as the President of the PM&R Thai Board Examination Committee as well as the Associate Program Director of The Royal Thai Army Hospital’s residency in PM&R. Through his time in Thailand he received a title DPMJ, Dato which is equivalent to that of the knighthood, from the late Majesty Sultan of Johor, Malaysia. On a yearly basis he continues to lecture in Thailand as an invited guest at their annual PM&R meetings. Dr. Hemtasilpa’s professional interests include Spinal cord injuries, electrodiagnostic testing toxin injections, musculoskeletal ultrasound, and injections. He is also Assistant Professor at Drexel University Department of Medicine.

Aimee Luo

Paul Brockman, MD

Core Outpatient Faculty, Medical Student Educator

Dr. Brockman graduated from the University of Maryland School of Medicine, later completing his Physical Medicine and Rehabilitation residency at Johns Hopkins. He is board certified in Physical Medicine and Rehabilitation as well in Electrodiagnostic Medicine. Dr. Brockman’s first career was as a high school science teacher, so he brings years of pedagogical passion and expertise to his more recent teaching position as an Assistant Professor at Drexel University Department of Medicine. His areas of interest include Cancer Rehabilitation, complex Electrodiagnostic testing, Ultrasound, and injections under ultrasound guidance. Dr. Brockmans downtime is often spent on the tennis court working on his swing.

Brian Fellechner

Brian Fellechner, DO

Core Outpatient Faculty, Research Coordinator

Brian Fellechner, DO, Core Outpatient Faculty, Research Coordinator - Dr. Fellechner began his journey in medicine at Philadelphia College of Osteopathic Medicine and later completed his Physical Medicine and Rehabilitation Residency at UMDNJ-New Jersey Medical School. Since joining our staff Dr. Fellechner has been an integral part of creating our outpatient urgent spine clinic. He is board certified in Electrodiagnostic Medicine, Physical Medicine and Rehabilitation and Acupuncture. Dr. Fellechner is also an Assistant Professor in the Department of Medicine and Drexel University College of Medicine. Dr Fellechner has had a diverse clinical career working previously at Good Shepard and St. Luke’s and has experience both in Inpatient and Outpatient rehab settings. He also was in Family Practice for 3 years with the National Health Service where he delivered baby in the back seat of a Chevrolet Bel Air. For 30 years Dr. Fellechner has been the lead guitarist in a Rock Band.

William Gleason

William Gleason, MD

Core Inpatient Faculty 

Dr. Gleason graduated from the Lewis Katz School of Medicine at Temple University. Initially starting his career as a surgical resident, Dr. Gleason soon found himself drawn to the holistic field of PM&R. After transitioning disciplines, he then went on to finish his Physical Medicine and Rehabilitation residency at the University of Pennsylvania Dr. Gleason is board certified in Physical Medicine and Rehabilitation and is also a Pennsylvania Department of Health Approval Medical Marijuana Practitioner. His areas of interest include spasticity management, musculoskeletal complexities, stoke, injections under ultrasound, toxin injections, and electrodiagnostic testing.

Haping Mei

Haiping Mei, MD PhD

Core Faculty, Amputee Medical Director 

Dr. Mei was born and raised in Shanghai, China which is where he started his career in medicine at Shanghai Medical University and then went to a residency in Orthopedic Surgery at Zhongshan Hospital. After coming to the United States, Dr. Mei obtained his Ph.D. of Microbiology at the State University of New York at Buffalo, later completing his Physical Medicine and Rehabilitation residency also at the State University of New York at Buffalo. Dr. Mei is board certified in Physical Medicine and Rehabilitation and is an Assistant Professor in the Department of Medicine and Drexel University College of Medicine. His areas of clinical interest include Amputee’s, electrodiagnostic testing, injections, pain management, and general rehab. Dr. Mei is an avid traveler and his most memorable travel experience was to Thailand.

Mark Chai

Mark Chai, MD

Faculty Associate, Medical Director Stroke Rehabilitation

Dr. Chai is a graduate of Hahnemann school of Medicine. He found his way to PM&R the long way around via an Internal Medicine residency at York Hospital where he stayed as chief resident, going on from there to complete his Physical Medicine and Rehabilitation residency at Thomas Jefferson University. He is board certified in Physical Medicine and Rehabilitation and is on the National Board of Medical Examiners. Dr. Chai is also an Assistant Professor at Drexel University Department of Medicine. His areas of interest include stoke care, inpatient medicine, and Toxin injections.

Dr. Cassiopeia Roychowdhury

Sanghoon Kim, MD

Faculty Associate, Family Medicine

Dr. Kim went through a six-year BS MD program at Penn State University and Jefferson Medical College at Thomas Jefferson University. His Physical Medicine and Rehabilitation residency was also completed at Thomas Jefferson Hospital. Dr. Kim is board certified in Physical Medicine and Rehabilitation as well as the subspecialties Spinal Cord Injury Medicine, Pain Medicine and Brain Injury Medicine. He also served as a Captain in the Air Force. Dr Kim’s side passion is volunteering for search and rescue which he does with his dog Turbo and newest dog Echo.

Li-Hong Lu

Li-Hong Lu, MD

Outpatient Faculty

Born and raised in Shandong, China, Dr. Lu started her journey in medicine at Shandong Medical University. After coming to the United States, she completed her Physical Medicine and Rehabilitation residency at Temple University Hospital. Dr. Lu is board certified in Physical Medicine and Rehabilitation as well as licensed in Acupuncture. Dr. Lu is also an Assistant Professor at Drexel University Department of Medicine. Her clinical areas of interest include toxin injections, osteopathic manipulations, electrodiagnostic medicine, injections, and acupuncture. Dr Lu is also an assistant Tia Chi instructor and an expert Tia Chi master.

Li-Hong Lu

Jason Yoo, MD

Outpatient Faculty

Dr. Yoo was born and raised in South Korea where he completed medical school and his Physical Medicine and Rehabilitation residency at Yonsei University. After coming to the United States, he completed a Physical Medicine and Rehabilitation residency at Montefiore Medical Center. He is board certified in Physical Medicine and Rehabilitation and in Electrodiagnostic Medicine. Dr. Yoo is also an Assistant Professor at Drexel University Department of Medicine. Dr. Yoo’s professional interests include electrodiagnostic medicine, adult and pediatric toxin injections, post concussive care, spasticity management, and injections. When not working Dr Yoo can be found on the golf course working on his golf swing.