Margaret Co, M.D.

Find a Provider

5.0 out of 5 
Accepting New Patients: 

Dr. Co is a graduate of the University of the Philippines College of Medicine. She completed her Residency at Long Island Jewish Medical Center and her Fellowship in Allergy and Immunology at New York Presbyterian Hospital – Cornell Campus. Prior to joining Pascack Valley Medical Group, she was in private practice in Ridgewood, NJ for over 20 years. She believes in the importance of patient education and partnership in managing their conditions. Dr. Co is a highly trained physician with experience to diagnose, treat and manage allergiesasthma and immunologic disorders including primary immunodeficiency disorders. These conditions range from the very common to the very rare, spanning all ages and encompassing various organ systems. Dr. Co is a Castle Connolly Top Doctor in her field.

Dr. Co is dual board certified in Allergy and Immunology by the American Board of Allergy and Immunology.

Featured Reviews



My husband Stanley has been using Dr. Co for over 20 years. She is amiable, professional. and supportive.

   — Paula Seegull


Dr Co is professional, thorough & knowledgeable. She always takes time to answer your questions and make sure she explains things completely. Dr Co even research’s info to get you answers. A great allergy doctor!

   — M B


Dr. Co is an outstanding diagnostician. She listened intently, was kind and thoughtful and provided excellent feedback. I would definitely recommend and see her again

   — Amy Pressman


Dr. Co is one of the most thorough Allergist and immunologist I’ve ever been to. She also spends a good amount of time with her patients.

   — David


I’ve been a patient of dr. Co’s for a few years now, and I’ve always received great, very personalized, and very attentive care. She puts a lot of effort into making sure you are getting the best possible results.

   — Olivia Cowie


I have been suffering from a facial fungus for the past five years and every dermatologist I visited simply looked through a database and offered a cream or ointment. Nothing worked until I met Dr. Co. Her approach was different - scientific by elimination. First, she checked for possible allergies over a period of a couple days and after eliminating any possible reaction from a litany of body lotions and shampoos, she finally nailed the root cause. Sorry I just forgot the medical terminology she used from Mayo clinic. The ointment she prescribed worked like magic. The facial fungus disappeared within a couple of days and my skin recovered. thank you Dr. Co.

   — Martin M.