Margaret Co, M.D.

5.0 out of 5 
Office Locations:


466 Old Hook Road, Suite 1
Emerson, NJ 07630
Get directions


1 W. Ridgewood Ave, Suite 301
Paramus, NJ 07652
Get directions


1 W. Ridgewood Ave, Suite 211
Paramus, NJ 07652
Get directions

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 Bergen Medical Associates, she was in private practice in Ridgewood, NJ for over 20 years. Dr. Co is Board Certified in Allergy and Immunology and sees both adults and children. She believes in the importance of patient education and partnership in managing their conditions. Her special interests include food allergy, asthma, allergic skin disorders and immune therapies. Dr. Co is a Castle Connolly Top Doctor in her field.

Featured Reviews



She is the best

   — Jacid Soto


I’ve been going to Dr. Co for thirty years. She has always taken wonderful care of me. She always listens to my concerns and gives me advice and suggestions. I would highly recommend her to anyone looking for a compassionate, knowledgeable Allergist.

   — Diana F


I have had allergies all my life and have been seeing Dr. Co for over 20 years. She is always professional, concise, friendly and explains things fully. She has helped me with my allergies and my asthma and is always up-to-date on the latest medications. I can honestly say that having Dr. Co treat me for my asthma (as well as my allergies) is the best thing I could have done! My allergies are decreasing and my asthma is well controlled which gives me a better quality of life. I absolutely love Dr. Co and the care that she has given me over the years. I recommend her to anyone suffering from allergies or asthma!

   — Highly Recommend Dr. Co


Dr. Co is an outstanding professional who is committed to her patients. She is thoughtful, kind, and knowledgeable about allergens, triggers, and general health. I would continue to recommend her to anyone needing an allergist.

   — CML


Dr. Co is a wonderful doctor. She takes her time with you, she listens to your concerns, and explains everything thoroughly. She has been so helpful is diagnosing and treating my many allergies. I have, and will continue to, recommend her to anyone looking for an allergist. The office staff is very friendly and helpful as well.

   — D. Marino


Dr. Margaret Co has been treating my allergies for several years. She answers my questions completely and understands how allergies effect my well-being.

   — Long Time Patient

Find a Provider