Enjoy an Allergy-Free Lifestyle with Help from Allergy Associates of the Palm Beaches


Mark R. Stein, M.D., F.A.C.P., F.A.C.A.A.I.

Dr. Mark Roger Stein graduated from Jefferson Medical College in 1968, following an internship at Abington Memorial Hospital. He served ten years in the United States Army, obtaining the rank of Lieutenant Colonel. During his military service, Dr. Stein performed his internal medicine residency training at Letterman Army Medical Center, and his allergy/ immunology training at Fitzsimmons Medical Center and National Jewish Medical and Research Center, both in Denver, Colorado. 

Dr. Stein subsequently served as Assistant Chief of the Allergy Immunology Service at Walter Reed Army Medical Center and Clinical Consultant to the National Institute of Health. Dr. Stein is board certified in allergy and immunology and internal medicine and a fellow of the following associations: American Academy of Allergy, Asthma & Immunology; American College of Allergy, Asthma & Immunology; American College of Chest Physicians; and American College of Physicians. Dr. Stein is listed in The Best Doctors in America; Woodward, White, Inc.; and Who's Who in America.

Alan P. Koterba M.D., Ph.D., F.A.C.A.A.I.

Dr. Alan Koterba has been with the practice for three years, he completed residency training in Internal Medicine at the University of Michigan Hospital in Ann Arbor, Michigan and Fellowship training in Allergy and Immunology at the Northwestern University Feinberg School of Medicine and Children's Memorial Hospital in Chicago, Illinois. Dr. Koterba is Board Certified in both Internal Medicine and Allergy and Immunology. He received his medical degree from the University of Toledo College of Medicine in Toledo, Ohio and also a doctoral degree in Biomedical Sciences at the University of Texas Health Science at San Antonio.

While at Northwestern he co-authored and presented research on immunodeficiency in adults with chronic sinusitis. In addition he received an award for teaching excellence as a Fellow at Northwestern and was the winner of the annual research award for the 2010 Illinois Society of Allergy, Asthma, and Immunology. He is a member of the American Academy of Allergy, Asthma, and Immunology and the American College of Allergy, Asthma, and Immunology.

Cathy Hollowell M.S.N., A.R.N.P.

Cathy Hollowell is the newest addition to the practice, she graduated from Wayne State University in Detroit, Michigan with a Masters of Science in nursing. She is board certified by the American Nurses Credentialing Center (ANCC) with a specialty in acute and critical care. Cathy has been a nurse for over 12 years and has a broad range of experience in areas including surgery, organ transplants, trauma and surgical intensive care (SICU). Prior to obtaining her post graduate degree, she was a SICU charge nurse in one of Detroit's major level 1 trauma hospitals. She is a member of the American Academy of Allergy, Asthma and Immunology.