Endocrinology - Test Selection and Interpretation
Two doctors reviewing information.

Find information relating to test selection, utilization, and interpretation of more than 170 of the endocrine-related tests performed at Quest Diagnostics Nichols Institute. Access Endocrinology Manual.

Polycystic Ovary Syndrome and Infertility in Women
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PCOS is the number one cause of infertility in women and often goes undiagnosed. We offer a complete PCOS testing portfolio. Read More.

Diabetes IQ™ Diabetes Risk Panel with Score
physician meeting with patient in office

Our graphical Diabetes IQ electronic report, provided with our Diabetes IQ testing services, includes an 8-year risk score, making it easier to communicate risk to your patients and influence positive lifestyle changes.

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Richard E. Reitz, MD

Dr. Richard E. Reitz, MD

Dr. Reitz, Medical Director, is part of our Quest Diagnostics Medical and Scientific Team. He specializes in Endocrinology and Internal Medicine. See more about professional consults.

Jon Nakamoto, MD, PhD, is giving a presentation

Testosterone Testing for Female Patients: Traps, Tips and Trends

Jon Nakamoto, MD, PhD, compares and contrasts testosterone assays and appropriate testosterone testing for female patients, including several clinical case studies focused on a variety of conditions. Read More.


Michael F. Holick, MD, PhD discusses vitamin D

Presentation Vitamin D discussion: its importance for bone health and reducing risk of chronic illnesses including autoimmune diseases, infectious diseases, deadly cancers, as well as discussing the diagnosis, treatment and measurement.

female physician

Tests for Drug-Resistant Hypertension

Adrenal disorders are sometimes the underlying cause of drug-resistant hypertension. Our Aldosterone and Plasma Renin Activity tests by LC/MS/MS provide better accuracy than currently available immunoassay tests. Read More.