Dr Jonathan R Katz

Endocrinology and diabetes mellitus, General (internal) medicine 03490022


  • Not Fee assured
  • Open Referral network
Not Fee assured
Open Referral network

Specialises in

  • Metabolic medicine


  • Face-to-face consultations
  • Video and telephone consultations

About me

Dr Katz studied Medicine at Cambridge University (1985-1988) and University College London (1988-1991). He began training in Endocrinology in 1994 at St Bartholomew’s Hospital. Dr Katz returned to University College London (UCL) for specialist registrar training from 1994-2001, working at UCL, The Royal Free and Whittington Hospitals. From 1996-1998, he undertook a 2-year research fellowship, culminating in an MD Thesis on “obesity and polycystic ovary syndrome”. In 1999, Dr Katz worked as a registrar in Sydney, Australia. He began his career as a Consultant Endocrinologist in the UK in 2001.

Dr Katz works as a Consultant Endocrinologist for the Royal Free London NHS Foundation Trust, based at Barnet Hospital. In 2009, Dr Katz was elected as a Fellow of the Royal College of Physicians (FRCP), an honour granted to consultants providing the highest standards of care. In 2019, Dr Katz was appointed as Regional Advisor for the Royal College of Physicians – this is an elected post with wider responsibilities supporting training, ensuring new consultant posts fulfil Royal College standards, appointing College Tutors and vetting FRCP applications.

Dr Katz has a busy NHS Endocrinology practice, seeing over 300 new patients and over 1000 follow-up patients each year. In addition, he looks after inpatients at Barnet Hospital with diabetes emergencies and acute endocrine disorders. Dr Katz has over 20 years’ experience in diagnosing and treating the full range of endocrine disorders. Whether you have a newly diagnosed problem or are seeking a review of your treatment, he is well placed to advise and help.

Areas of interest

Thyroid disorders; Overactive Thyroid; Underactive Thyroid; Hypothyroidism; Diabetes (Types 1 and 2); Polycystic Ovary Syndrome; High Prolactin level; Pituitary disorders

Medical secretaries

About me
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Information for healthcare professionals

Information for healthcare professionals (Bupa patients only, last 12 months)

Procedures completed

  • 20365

    Follow-up out-patient consultation - remote - (1-5)

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