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Dr Theo Criswell

BMBS (Hons) MMedSc PGCert HBE MAcadMEd FHEA DFSEM (UK) MRCGP

General Practitioner

London, SW1W8EE

5

/5

(22 reviews)

London, SW1W8EE

Areas of expertise

Health Assessments
14
Health Check (Screening)
5
Children's Health
3

Contact

Book


Expert in:

About Dr Theo Criswell

Dr Theo Criswell is a dedicated GP with a strong commitment to combining evidence-based medicine with a warm, unhurried, patient-centred approach to care. As a fifth-generation doctor, he values building long-term relationships with patients and supporting individuals and families through every stage of life, from child health to later-life and palliative care.

He completed his medical training with Honours and Distinction, receiving a Dean’s Commendation for excellence in undergraduate medicine. Following this, he undertook broad postgraduate training at Frimley Park Hospital and St George’s Hospital, London, gaining experience across a wide range of medical specialties. He enjoys the full scope of general practice, with particular interests in preventative medicine, musculoskeletal health, mental health, and sexual health.

Alongside his clinical work, Dr Criswell has a strong interest in medical education and research. He holds a Master’s degree in Medical Sciences and has published research in neuropathology. He also completed a postgraduate qualification in Medical Education and is a Fellow of Advance HE and a member of the Academy of Medical Educators. He continues to teach medical students as a tutor at City St George’s, University of London.

Dr Criswell also holds a Diploma in Musculoskeletal Medicine and is a Fellow of the Faculty of Sport and Exercise Medicine. He provides medical support for sporting events across the UK, with a particular interest in endurance sports.

Outside medicine, Theo enjoys music, tennis, golf and skiing, and lives in South London with his family.


Subspecialties

  • Health Screening
  • Lifestyle Medicine

Areas of expertise

Click the bar to read patient reviews

Health Assessments
14
Health Check (Screening)
5
Children's Health
3
Menopause
2
Mental Health Support
2
High Blood Pressure
1
Hormone Replacement Therapy (HRT)
1
Weight Management
1
Hypermobility Syndrome
1
Fainting (Syncope)
1
Anxiety
1
Inflammatory Skin Conditions
1
Bacterial Infection
1
Health Anxiety
1
Vaccination Advice
Immunisations

Registered with

General Medical Council

No. 7603580

The Academy of Medical Educators

Royal College of General Practitioners

Faculty of Sports and Exercise Medicine (FSEM)


Languages spoken

  • English

Locations

The Criswell Practice

6B Sloane Square, London, United Kingdom, SW1W8EE

5.00(18 reviews)

Opening hours

Monday
08:30 - 17:00
Tuesday
08:30 - 17:00
Wednesday
08:30 - 17:00
Thursday
08:30 - 17:00
Friday
08:30 - 17:00
Saturday
Sunday

Opening hours

Monday
08:30 - 17:00
Tuesday
08:30 - 17:00
Wednesday
08:30 - 17:00
Thursday
08:30 - 17:00
Friday
08:30 - 17:00
Saturday
Sunday

Areas of expertise

Health Assessments
14
Health Check (Screening)
5
Children's Health
3

Contact

Book

Reviews

5
verified patient
04 Jun 2026

Theo is my hero! He saved me from a lot of pain and a long wait. Truly exceptional.

Patient seen for:
5
verified patient
03 Jun 2026

Theo helped us on an urgent matter, late at night in a bank holiday Saturday. It was the best medical care I have received. Without question.

Patient seen for:
5
verified patient
02 Jun 2026

Theo has a very calm and considered manner. He takes his time to properly understand the problem and is clearly highly intelligent and extremely thoughtful. More importantly he is very knowledgeable. In short, my whole family find him extremely mature and an outstanding doctor.

5
verified patient
01 Jun 2026

The short experience of dealing with Dr Theo has been extremely positive. He has been delightful to have looking after me throughout, extremely caring and concerned, and going out of his way to explain medical matters to me. The one reservation I would have concerns an introduction to another doctor, based at a London clinic, who proved excessively expensive and insisted I got myself into the Cleveland Clinic for tests the same day when those tests demonstrated there was nothing major the matter. Other than that, it has been an absolute pleasure to deal with Dr Theo throughout.

Patient seen for:
5
verified patient
31 May 2026

Dr. Theo Criswell is a highly competent physician, he takes time to understand symptoms and suggest the best care plan

Patient seen for:
5
verified patient
29 May 2026

Dr Criswell listened to my concerns and addressed them in a knowledgeable and understanding way. He is very easy to talk with and takes a real interest in my health. Brilliant !

Patient seen for:
5
verified patient
28 May 2026

Dr Theo Criswell is outstanding in every respect. He possesses a tremendous depth of wisdom and a wonderful manner that immediately inspires confidence that, whatever the problem, it can be dealt with effectively. He also has a reassuring approach that helps to alleviate the anxieties that so often accompany a visit to the doctor in the first place.

Patient seen for:
5
verified patient
27 May 2026

Excellent, someone who listens and guides you, professional with kindness and knowledge ! One feels in good hands !

Patient seen for:
5
verified patient
27 May 2026

Very thorough

5
verified patient
27 May 2026

I’ve been to Dr Criswell a few times now for a number of different reasons. Dr Criswell is without a doubt the most attentive, knowledgable and easy to talk to doctor I’ve ever had. He goes the extra mile to ensure the wellbeing of his patients and truly listens to and validates any concerns that are voiced. He explains things clearly and thoroughly and has been a massive help through a difficult period.

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FAQ

What are Dr Theo Criswell's reviews like?

Dr Theo Criswell's overall patient rating is 5 out of 5 stars on Doctify. This is based on 24 reviews.

What languages does Dr Theo Criswell speak?

Dr Theo Criswell speaks English

Where is Dr Theo Criswell located?

Dr Theo Criswell primarily practices at The Criswell Practice, located at 6B Sloane Square, London, United Kingdom, SW1W8EE
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What are Dr Theo Criswell working hours?

Dr Theo Criswell is working Monday (08:30 - 17:00), Tuesday (08:30 - 17:00), Wednesday (08:30 - 17:00), Thursday (08:30 - 17:00), Friday (08:30 - 17:00)

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Does Dr Theo Criswell accept new patients?

Dr Theo Criswell generally accepts new patients.

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