Centre for obesity


Making a referral

We accept referrals from GPs.

Bariatric surgery (tier 4)

Your patient may be suitable for surgery if they have:

  • failed to maintain weight loss using non-surgical measures, such as tier 3 weight management
  • a body-mass index (BMI) between 30 to 35, with recent onset type 2 diabetes
  • a BMI between 35 and 40, with other significant disease that could improve if they lost weight (for example, type 2 diabetes or high blood pressure)
  • a BMI of more than 40
  • a BMI of more than 50kg (weight-loss surgery should be considered as first line treatment)

The first step on our obesity pathway is an online weight-loss surgery education group session. Your patient may not be suitable for this if they:

  • need an interpreter
  • have a significant learning difficulty
  • have already had bariatric surgery

If the patient is not suitable for this education session please note this in your referral.

Please make all referrals using the NHS e-Referral Service (e-RS).

  1. Under organisation or site name search for 'Guy's'
  2. Choose 'Guy's and St Thomas' Hospitals'
  3. Return to 'directory of service' tab
  4. Under 'service results' choose:
    • 'Video Obesity Medicine'
    • 'endocrinology'
    • 'Guy's and St Thomas''
    • 'RJ1'
    • The name of the clinician will be shown as 'McGowan, Barbara (Dr)'

South east London healthy weight programme

Our south east London healthy weight programme referrals page has information about referring to the healthy weight programme.

Last updated: June 2022

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