About Deia Health
A different kind of private healthcare
A boutique private integrative GP and lifestyle medicine clinic on Harley Street — GP consultations and memberships, advanced health screening, executive health and home, hotel or office visits across London.
3 ways to book
GHP Global Excellence Awards
Winner — Best Holistic Private
Healthcare Clinic 2026, London
Conventional, lifestyle and functional medicine held by one expert team — finding the root causes of ill health to support lasting vitality, healthy ageing and long-term prevention.
Regulated, registered, verified
Dr Lafina Diamandis consults and treats patients at 9 Harley Street (trading as 9 Harley Street Limited) registered with the Care Quality Commission (CQC). All clinical services provided here operate under 9 Harley Street Limited's full governance, policies, and regulatory registration.
Our approach
We replace the rushed ten minutes with the care your health deserves
Our structured approach brings together the latest insights from clinical medicine, neuroscience, lifestyle science and personalised diagnostics — the eight domains that shape how you feel, considered together.
Care integrates conventional medicine with lifestyle and functional medicine, because around 80% of chronic disease is driven by lifestyle factors. Addressing those drivers directly is what makes outcomes hold.
The aim is always the same: clarity, confidence and meaningful, sustainable health outcomes.
3 ways to book
19yrs
NHS & private practice
Dr Lafina Diamandis
Founder & Medical Director
Clinical depth, and the kind of listening people remember
A GMC-registered GP, Member of the Royal College of General Practitioners and board-certified Lifestyle Medicine physician, with 19 years across the NHS and private medicine.
She has served as GP to Goldman Sachs, BUPA and The Telegraph, and has practised in the concierge medicine sector — experience that shaped a clinic built for demanding cases and discreet, high-touch care.
Expertise
- Preventative health and healthy ageing
- Cognitive performance
- Hormonal and women’s health
- Mental health and burnout
Training
- King’s College London — BSc, MBBS
- University College London & Sorbonne — MSc, Brain & Mind Sciences
- British Society of Lifestyle Medicine — Dip IBLM/BSLM
- Institute for Functional Medicine — AFMCP
Independently verified
What our patients say
These reviews are pulled live from our Doctify profile, the independent review platform used across UK private healthcare. Reviews are submitted by verified patients and cannot be edited or removed by the practice.
“Dr Lafina was very thorough in understanding my complex situation which made me feel really comfortable and in safe hands. I found Dr Lafina very polite, knowledgeable and professional. As a result I have recommended her to 2 family members.”
“Dr Diamandis was excellent throughout my health screen. She was thorough, professional, and took the time to explain everything clearly. She made my results easy to understand and answered all of my questions.”
“It is so amazing to have a doctor that listens and cares.”
“This was the third time I've seen Dr Lafina Diamandis. She is very friendly and approachable and she listens and responds to me as an individual.”
“Always the most positive experience coming to Deia Health. A really comprehensive health screen, that is thorough, kind and compassionate.”
“Dr Lafina was very thorough in understanding my complex situation which made me feel really comfortable and in safe hands. I found Dr Lafina very polite, knowledgeable and professional. As a result I have recommended her to 2 family members.”
“Dr Diamandis was excellent throughout my health screen. She was thorough, professional, and took the time to explain everything clearly. She made my results easy to understand and answered all of my questions.”
“It is so amazing to have a doctor that listens and cares.”
“This was the third time I've seen Dr Lafina Diamandis. She is very friendly and approachable and she listens and responds to me as an individual.”
“Always the most positive experience coming to Deia Health. A really comprehensive health screen, that is thorough, kind and compassionate.”
A team built around you
Invited, not assembled
Every practitioner here was chosen personally by Dr Lafina, and each shares the same philosophy: meticulous clinical thinking, a holistic view, and genuinely compassionate care. They are brought into your plan only when they will move it forward — and your doctor stays across all of it.
Samantha Renalls
Clinical Psychologist
Over a decade helping people navigate their mental health, rooted in CBT and mindfulness.
Kaitlin Colucci
Holistic Gut Health Dietitian
One of the UK’s leading gut-health dietitians, blending science-backed nutrition with yoga and breathwork.
Marian Clark
Somatic Practitioner
A gentle, transformative approach connecting body and emotion to release deep-seated blocks.
Nicole Goode
Functional Medicine Nutritionist
A leading voice on immune health, autoimmunity and energy, with bespoke functional medicine programmes.
Elle Kelly
Sports Nutrition Dietitian
Helping women fuel their bodies and rebuild a balanced, compassionate relationship with food.
Sabrina Chorafa
Eating Disorders Dietitian
Registered dietitian and trainee psychotherapist integrating nutritional and psychological care.
Bhavisha Pankhania
Breathwork & Yoga Instructor
Over 15 years teaching yoga, meditation and breathwork, accredited in pregnancy and postnatal yoga.
Vivian Pertile
Reflexology
Kind, skilled and deeply intuitive — sessions that feel like a fine-tuning for body and mind.
9 Harley Street, London
Bring us the whole story, not the summary
Book a consultation, email the clinic, or call and speak to the team who will look after you.
3 ways to book
Featured in and trusted by
Start the conversation
Tell us what you need,
and we will take it from there
Send a short enquiry and the clinic team will reply the same working day with availability and the right appointment length for you.
- hello@deiahealth.com
- Clinic
- 9 Harley Street, London — also by video
- Response time
- Same working day
9 Harley Street, London
Bring us the whole story,
not the summary
Book a consultation with Dr Lafina, or speak to the clinic team first if you would rather talk it through before choosing an appointment.