Dr. Portnay graduated from the Rosalind Franklin University/ Chicago Medical School in 1968. He works in Billerica, MA and 1 other location and specializes in Endocrinology, Diabetes & Metabolism and Internal Medicine. Dr. Portnay is affiliated with Winchester Hospital.
Endocrinology, Diabetes & Metabolism, Internal Medicine
Medical School: Rosalind Franklin University/ Chicago Medical School; Graduated 1968
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*This physician has multiple office locations. See Office Information for details.