2 Medical Center Dr STE 210, Springfield, MA



 Our physicians concentrate on disorders of the internal endocrine glands such as the thyroid and adrenal glands. We also specialize with disorders such as diabetes, metabolic disorders, pituitary diseases and menstrual and sexual problems and more…

Endocrine Associates of Western Massachusetts

How to access the Patient Portal:

Our portal allows our patients to have access to their medical record and have the ability to contact your doctor or practice.  The portal ensures your account and information is secure and safe.  With the portal, you can also see your appointments or schedule a new appointment.  If you any trouble with or questions about the patient portal, please reach out to our office for assistance.

Endocrine Associates of Western Massachusetts

Our Western Massachusetts Location

Our patients can find the Endocrine Associates of Western Massachusetts office located in Springfield, MA at 2 Medical Center Drive STE 210, Springfield, MA 01107.  We are a group practice specializing in Endocrinology, Diabetes, and Metabolic Disorders, Pituitary Diseases, and menstrual and sexual problems. 

Need to get in contact with our office or our doctors? Give us a call!

Areas of Expertise

At the Endocrine Associates of Western Massachusetts, we specialize in Endocrinology, Diabetes, Metabolic Disorders, Pituitary Diseases and Menstrual and Sexual Problems and more…




Endocrine Glands


Sexual Problems

Pituitary Diseases

Adrenal Glands

Our Doctors

At the Endocrine Associates of Western Massachusetts, we have 3 praciticing doctors at our group practice.  We are proud to have an amazing team at our office!

Dr. Marc Vanderleeden, MD

Dr. Marc Vanderleeden, MD has been practicing medicine for over 44 years. He graduated from the Albert Einstein College of Medicine of Yeshiva University in 1978.

Dr. Barry Izenstein, MD

Dr. Barry Izenstein, MD has over 50 years of experience in the medical field. He graduated from University of Cincinnati in 1972.

Dr. Kimberly Browne-Martin, MD

Dr. Kimberly Browne-Martin, MD has over 32 years of experience. She graduated from New York Medical College in 1990.

Riyana Khalifa, PA-C

Riyana Khalifa, PA-C, is a board-certified physician assistant and a 2023 graduate of Springfield College.

Patient Portal

Insurance Information


The following insurances are not accepted:

  • Masshealth

  • BMC Health Net

  • HealthNewEngland Be Healthy

  • Tufts Together

  • Tufts Direct

  • Wellcare Mercy Alliance

We apologize for any inconvenience this may cause.  If you have any questions please reach out to our office. Phone: (413) 734-4661