Merendino John J Jr, MD

I HIGHLY recommend Dr. John Merendino as an endocrinologist, and I am a VERY selective patient.
I saw him for a second opinion after having gone to another highly rated endocrinologist, Dr. Mark Tanen (Mclean, VA). They could not be more different.
Dr. Merendino was recommended by my nutritionist and I found him to be very competent and a great listener; he spent over 1 ½ hours addressing my questions.
He used to be a researcher at the National Institutes if Health (NIH) and practices solo.
In contrast, Dr. Tanen was very terse in both visits and unwilling to dwell on my questions which led him to misunderstanding my problem in the first visit.
He has also written a book about diabetes, with both a nutritionist and a fitness expert, but that is not his only area of expertise.