Clifton M. Jackness, M.D.

Clifton M. Jackness Endocrinologist in NYC

Endocrinologist In NYC

Clifton M. Jackness, M.D. is a graduate of Yale University and earned his medical degree from the Albert Einstein College of Medicine. He completed his internship and residency in Internal Medicine at The Mount Sinai Medical Center, as well as a Fellowship in Endocrinology, Bone Disease , Diabetes , and Metabolism at Columbia University Medical Center.

Dr. Jackness is licensed in New York and is board certified in Endocrinology, Diabetes and Metabolism. He has been recognized with awards in clinical skills, compassionate care, research and teaching.

Diabetes, Obesity and Hormonal Research

As a keen researcher, Dr. Jackness has been involved in projects investigating Type 2 diabetes and obesity, as well as the hormonal changes that take place after bariatric surgery and weight loss. He was selected to present his work at the American Diabetes Association, New York Academy of Medicine, New York University, Columbia University, and the Obesity Society.

In addition, Dr. Jackness has been a chosen speaker at the New York Thyroid Club. In addition, he has been selected to review research articles about male hypogonadism and testosterone deficiencies for MedPage Today, and has an interest in Finasteride-induced testosterone deficiency, as well as the intricacies of autoimmune (Hashimoto’s and Graves’) thyroid disease.

Endocrinology Affiliations

Dr. Jackness is an Attending Physician at the NYU-Langone Health and Northwell/Lenox Hill Hospital, with academic appointments at both the NYU-Grossman School of Medicine and Zucker School of Medicine-Hofstra.

He is a member of the Endocrine Society, the American Association of Clinical Endocrinologists, the New York Thyroid Club, the Metropolitan New York Bone Club, the Medical Society of the State of New York, the New York County Medical Society, and the American Medical Association.

Dr. Jackness believes in the individuality of medical care and seeks to partner with his patients to find the best way to achieve optimal health.

Meet Dr. Jackness

Hear Why People Are Choosing Park Avenue Endocrinology


"Always a pleasure seeing Dr. Jackness. He is thorough, attentive and has wonderful bedside manner. He is knowledgeable and takes the time to talk about all of your medical concerns. I can’t say enough nice things about him! Personable and professional doctor. Highly recommend!"



"Dr. Jackness is the Best Endocrinologist ever, he is always so knowledgeable. He always goes over my result’s and takes the time to discuss next steps with me."


Contact Us Today!

If you have any questions or comments, or if you want to learn more about the services we provide, please call us at 212-772-7628 . For a consultation, or to setup an appointment click here.