Dr. Mark P. Diehl

Ivan Marchena-Mendez is a Rheumatologist in York, Pennsylvania. Dr. Marchena-Mendez is rated as a Distinguished provider by MediFind in the treatment of Rhizarthrosis. His top areas of expertise are Postmenopausal Osteoporosis, Osteoporosis, Rheumatoid Arthritis (RA), and Psoriasis. Dr. Marchena-Mendez is currently accepting new patients.

Robert O'brian is a Rheumatologist in Eldersburg, Maryland. Dr. O'brian is rated as an Advanced provider by MediFind in the treatment of Rhizarthrosis. His top areas of expertise are Psoriatic Arthritis, Fibromyalgia, Psoriasis, and Rheumatoid Arthritis (RA). Dr. O'brian is currently accepting new patients.

Dr. Ziglar is a graduate of Stony Brook University where she was a scholar member of the Phi Beta Kappa honor society. She earned her medical degree at the State University of New York, Downstate, and completed her internal medicine residency at North Shore University Hospital, New York. She completed her fellowship training for rheumatology at New York University’s Hospital for Joint Diseases, where she was recognized by medical residents with the Fellow of the Year Award for distinguished teaching.Following fellowship, Dr. Ziglar began private practice while she maintained teaching faculty appointments as Asst. Clinical Professor of Medicine at Montefiore Medical Center in New York and later at St. Joseph Regional Medical Center in New Jersey.Although Dr. Ziglar treats all types of rheumatic conditions, she has a special interest in osteoporosis and has conducted lab research focused on promoting the development of bone and cartilage cells. Her research was recognized in the form of awards and scholarships through the National Science Foundation, the National Institutes for Health, and the Howard Hughes Medical Institute. She has contributed to the Journal of Biological Chemistry and her research was presented in multiple national abstract meetings. Dr. Ziglar finds involvement in healthcare advocacy meaningful. While a member of the American College of Rheumatology’s Government Affairs Committee, she led the 2019-2022 revisions of the College’s Health Policy Statement. Dr. Ziglar is rated as a Distinguished provider by MediFind in the treatment of Rhizarthrosis. Her top areas of expertise are Arthritis, Postmenopausal Osteoporosis, Osteoporosis, and Rheumatoid Arthritis (RA).