Dr Mark Cohen

Dr Mark Cohen

Consultant Endocrinologist

MBChB, BSc(Hons), PhD, FRCP(Lond)

Specialises in

  • Endocrinology and diabetes mellitus
  • Obesity
  • Pituitary disease
  • Thyroid disease

Also available for:

Virtual consultations:

I provide a comprehensive and personally-tailored service for patients with endocrine and diabetic conditions. Multidisciplinary assessment is available for patients with obesity or diabetes, with access to an expert dietitian and diabetic specialist nurse for patients under my care.

Thyroid or parathyroid patients who require a surgical opinion benefit from my close collaboration with a very experienced thyroid surgical team.

I qualified in medicine from the University of Birmingham in 1994 with a 1st class honours degree in Physiology. After becoming a member of the Royal College of Physicians in 1998 I returned to London to become a Medical Research Council Clinical Research Fellow at Hammersmith Hospital under the supervision of Professor Steve Bloom.

My original research on the role of the gut hormones PYY, oxyntomodulin and ghrelin in the regulation of food intake culminated in a PhD in Physiology, awarded in 2005. Obesity surgery is believed to act through alterations in the release of these appetite-regulating hormones.

I was appointed Consultant in Endocrinology and Diabetes at Barnet Hospital in 2006 and continue to have a specialist interest in the clinical management of obesity.


General Medical Council Number: 4103608

Treatment information

Some of the principal treatments carried out by Dr Mark Cohen at Spire include:

Endocrinology and diabetes

General medicine

Other treatments

  • Endocrinology
  • Obesity
  • Parathyroid disease
  • Pituitary disease
  • Thyroid disease

Get in touch

Important information about COVID-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire Bushey Hospital.


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Additional information

Endocrinology and diabetes mellitus
Thyroid disease
Parathyroid disease

Professional memberships

Royal College of Physicians

Royal Society of Medicine

Society for Endocrinology Diabetes UK

British Medical Association, Osteoporosis Society

Consultant Physician and Specialist in Endocrinology and Diabetes at Barnet Hospital and Chase Farm Hospitals NHS Trust.

I am married (to a dietitian) and have two young children (aged three and six years). I spent my childhood in Potters Bar and went to school in Elstree. My many interests include tennis, skiing, ice-skating, music and theatre, art-house films, modern art and design, 20th century furniture and technological gadgets!

Telephone 020 8901 5555
Private secretary Debra Pittal and Joanne Green
Private secretary telephone 07743 764882
Private secretary email markcohen.pa@gmail.com