70 North Country Road, Suite 205
Port Jefferson, NY 11777


The professionals at Mather Endocrinology are pleased to offer today's best medicine to our patients. Our practice addresses general endocrinology, diabetes, thyroid disorders, cholesterol disorders, and hormone imbalance.

Our dedicated team of healthcare professionals and staff are committed to providing quality patient care by utilizing the latest in medical advances and technology. We offer comprehensive treatments to improve the quality of life for our patients.

Diabetes evaluation, management and education include: 

  • Nutrition and lifestyle education for diabetes provided by registered dietitians who are certified diabetes educators (CDE)
  • Blood sugar meter teaching
  • Initiation, titrating and monitoring of insulin and/or oral diabetes medication
  • Pump therapy initiation and/or management
  • Continuous glucose monitoring (CGMS) interpretation and medication adjustments

Office services include neck ultrasounds, FNA biopsies, CGMS and insulin pump therapy, as well as collaboration with the hospital in planning, managing and treatment.

Diabetes Education Services
Diabetes education gives you the knowledge and skills you need to manage your diabetes. Controlling your blood sugar helps you feel better. Keeping your blood sugars in control  will help to prevent complications of diabetes, such as heart disease, blindness, kidney disease, and amputation.

Individual and group classes are taught by our CDEs who are also registered dietitian nutritionists (RDNs). Our RDN, CDEs are outstanding leaders in the field of nutrition and diabetes care. They can help make individualized plans for your personal needs.

Our diabetes education program is recognized by the American Diabetes Association for meeting the national standards for excellence in diabetes self-management education.

Some of the more common conditions treated by Mather Endocrinology include:

  • Adrenal disorders
  • Calcium/bone disorders
  • Cancers of the endocrine glands
  • Cholesterol (lipid) disorders
  • Diabetes; Pre-diabetes, Type 1 diabetes, Type 2 diabetes, gestational diabetes
  • Hypertension
  • Insulin pump and disease management
  • Menopause
  • Men and women's health
  • Metabolic syndrome
  • Hypertension
  • Osteopenia and osteoporosis
  • Over and underactive thyroid
  • Pituitary tumors
  • Thyroid diseases
  • Weight management

Meet our professionals photo:
Top row left to right; Mark Doublet, RD, CDE, NASM-CPT and Margaret Hofacker, BSN, RN, CDE.
Bottom row, left to right; Amrita Srivastava, MD, Ella Rosenbloom, MD and Kathryn Corbett-Shouler, RD, CDN.

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