EmergiCenter Physicians

Our physicians maintain board certification in their respective specialties, in addition to emergency medicine training, to provide patients with exemplary care. They strive to provide all medical services to our patients in a caring and compassionate manner.

Our Physicians

David J. Shingles, D.O.

Dr ShinglesDr. David Shingles is the founder and Medical Director of Cedar Crest EmergiCenter®. He has maintained a private family practice in the Lehigh Valley since 1977.  Dr. Shingles started his career as a pharmacist graduating from Union University, Albany College of Pharmacy in 1967.  He obtained his medical degree at the Philadelphia College of Osteopathic Medicine in 1975.

Dr. Shingles is board certified in Family Medicine and is a certified Medical Review Officer. He is a member of the American Osteopathic Association, Pennsylvania Osteopathic Medical Association, and American College of Family Physicians in Osteopathic Medicine and Surgery.  Dr. Shingles holds active staff affiliations with Lehigh Valley Hospital and St. Luke’s Hospital.  He is a clinical instructor for Pennsylvania College of Osteopathic Medicine and DeSales University.

Jonathan L. Shingles, D.O.

ShinglesDr. Jonathan Shingles earned his Bachelor of Science degree in Biology from Massachusetts Institute of Technology and is a 2000 graduate of the Philadelphia College of Osteopathic Medicine.  Dr. Shingles completed both his internship and residency in Emergency Medicine at St. Luke’s Hospital, Bethlehem, where he currently holds a position as Director of the Emergency Room.  Additionally, he received his MBA in Health Care Administration from St. Joseph’s University of Philadelphia.

Dr. Shingles certifications include; Advanced Life Support, Advanced Trauma Life Support, and Pediatric Advanced Life Support.  He maintains an active membership of the Pennsylvania Medical Association.

Joanne Steward, M.D.

Dr. Joanne Steward is a 1985 graduate of Temple University School of Medicine.  Additionally, Dr. Steward holds both a Master's Degree in Nutrition Science and a MBA from Drexel University.  Dr. Steward is an active member of the American Medical Association.

Dr. Steward has practiced family and internal medicine in the Lehigh Valley for many years prior to joining the staff of Cedar Crest EmergiCenter® in 1995.


Physicians On Duty


Cedar Crest EmergiCenter
Weekdays 8:00 a.m.-8:00 p.m.
Weekends 8:00 a.m.-6:00 p.m.
(610) 435-3111

Airport Road EmergiCenter
Daily 8:00 a.m.-6:00 p.m.
(610) 264-5844