1,677,770 items of data are available, covering 450,841 participants, encoded using Data-Coding 
.
Array indices run from 0 to 21.
| Category | Count | 
|---|
| Accident & emergency (A&E) | 54997 | 
| Acute medicine | 279 | 
| Acute mixed | 4 | 
| Acute other | 9 | 
| Addiction Services | 46 | 
| Adult Cystic Fibrosis Service | 20 | 
| Adult mental illness | 4226 | 
| Major Trauma | 3 | 
| Allergy | 291 | 
| Allied Health Professional (AHP) Services | 0 | 
| Anaesthetics | 5301 | 
| Anticoagulant service | 19 | 
| Art Therapy | 0 | 
| Audiological medicine | 4 | 
| Audiology | 7 | 
| Blood transfusion | 0 | 
| Bone and marrow transplantation | 453 | 
| Breast surgery | 13564 | 
| Burns care | 349 | 
| Cardiac Rehabilitation | 44 | 
| Cardiac surgery | 6430 | 
| Cardiology | 75777 | 
| Cardiothoracic surgery | 7226 | 
| Cardiothoracic transplantation | 91 | 
| Chemical pathology | 465 | 
| Child and adolescent psychiatry | 8 | 
| Clinical Cytogenetics and Molecular Genetics | 0 | 
| Clinical Neurophysiology | 17 | 
| Clinical Physiology | 8 | 
| Clinical Psychology | 3 | 
| Clinical genetics | 36 | 
| Clinical haematology | 13517 | 
| Clinical immunology | 121 | 
| Clinical immunology and allergy | 487 | 
| Clinical microbiology | 8 | 
| Clinical oncology | 19645 | 
| Clinical pharmacology | 851 | 
| Colorectal surgery | 37517 | 
| Communicable Diseases | 412 | 
| Community Dental Practice | 3 | 
| Community Paediatrics | 1 | 
| Community Sexual & Reproductive Health | 0 | 
| Community medicine | 143 | 
| Complex Specialised Rehabilitation Service | 72 | 
| Congenital Heart Disease Service | 55 | 
| Critical care medicine | 4964 | 
| Dental medicine | 91 | 
| Dermatology | 30234 | 
| Diabetic Education Service | 3 | 
| Diabetic medicine | 5503 | 
| Diagnostic Imaging | 2037 | 
| Dietetics | 5 | 
| Drama Therapy | 0 | 
| Ear, nose and throat (ENT) | 46113 | 
| Eating Disorders | 1 | 
| Endocrinology | 8745 | 
| Endocrinology & Diabetes | 120 | 
| Forensic psychiatry | 40 | 
| GP Other than Obstetrics | 275 | 
| Gastroenterology | 155891 | 
| General medicine | 192764 | 
| General pathology | 29 | 
| General practice other than maternity | 176 | 
| General practice with maternity function | 462 | 
| General surgery | 201517 | 
| Genito-urinary medicine | 72 | 
| Geriatric medicine | 33169 | 
| Gynaecological oncology | 3258 | 
| Gynaecology | 87886 | 
| Haematology | 1189 | 
| Haemophilia | 95 | 
| Hepatobiliary & pancreatic surgery | 4239 | 
| Hepatology | 2481 | 
| Histopathology | 0 | 
| Homeopathy | 74 | 
| Immunopathology | 23 | 
| Infectious diseases | 6321 | 
| Intensive therapy unit | 498 | 
| Intermediate care | 611 | 
| Interventional radiology | 6081 | 
| Joint Consultant Clinics | 0 | 
| Learning disability | 18 | 
| Liaison Psychiatry | 5 | 
| Local Specialist Rehabilitation Service | 28 | 
| Maxillo-facial surgery | 8557 | 
| Medical microbiology | 0 | 
| Medical oncology | 15265 | 
| Medical ophthalmology | 112 | 
| Medical virology | 13 | 
| Mental Health Dual Diagnosis Service | 0 | 
| Mental Health Recovery And Rehabilitation Service | 1 | 
| Metabolic Diseases | 99 | 
| Midwife episode | 1740 | 
| Music Therapy | 0 | 
| Neonatology | 2 | 
| Nephrology | 5848 | 
| Neurology | 13312 | 
| Neuropathology | 2 | 
| Neurosurgery | 16062 | 
| Non-UK Provider | 70 | 
| Not a treatment function | 0 | 
| Not known | 20772 | 
| Nuclear Medicine | 67 | 
| Nursing episode | 11 | 
| Obstetrics | 14067 | 
| Obstetrics: AN (outpatients) | 4 | 
| Obstetrics: PN (outpatients) | 0 | 
| Occupational Therapy | 1 | 
| Occupational medicine | 0 | 
| Old age psychiatry | 1805 | 
| Ophthalmology | 96624 | 
| Optometry | 3 | 
| Oral medicine | 1 | 
| Oral surgery | 23327 | 
| Oral surgery/medicine | 839 | 
| Orthodontics | 8 | 
| Orthodontics/Paediatric Dentistry | 0 | 
| Orthoptics | 2 | 
| Other diagnostic | 0 | 
| Paediatric Audiological Medicine | 0 | 
| Paediatric Burns Care | 0 | 
| Paediatric Cardiac Surgery | 13 | 
| Paediatric Clinical Haematology | 0 | 
| Paediatric Clinical Immunology and Allergy | 2 | 
| Paediatric Cystic Fibrosis | 0 | 
| Paediatric Dermatology | 6 | 
| Paediatric Diabetic Medicine | 0 | 
| Paediatric Ear Nose and Throat | 17 | 
| Paediatric Endocrinology | 0 | 
| Paediatric Epilepsy | 0 | 
| Paediatric Gastroenterology | 2 | 
| Paediatric Gastrointestinal Surgery | 0 | 
| Paediatric Infectious diseases | 0 | 
| Paediatric Intensive Care | 0 | 
| Paediatric Interventional Radiology | 0 | 
| Paediatric Maxillo-Facial Surgery | 0 | 
| Paediatric Medical Oncology | 7 | 
| Paediatric Metabolic disease | 0 | 
| Paediatric Nephrology | 2 | 
| Paediatric Neuro-disability | 0 | 
| Paediatric Neurosurgery | 4 | 
| Paediatric Ophthalmology | 16 | 
| Paediatric Pain Management | 1 | 
| Paediatric Pheumalogy | 0 | 
| Paediatric Plastic Surgery | 15 | 
| Paediatric Respiratory Medicine | 0 | 
| Paediatric Thoracic Surgery | 0 | 
| Paediatric Transplantation Surgery | 0 | 
| Paediatric Trauma and Orthopaedics | 36 | 
| Paediatric Urology | 2 | 
| Paediatric cardiology | 65 | 
| Paediatric dentistry | 31 | 
| Paediatric neurology | 2 | 
| Paediatric surgery | 41 | 
| Paediatrics | 97 | 
| Pain management | 12238 | 
| Palliative medicine | 2452 | 
| Perinatal Psychiatry | 0 | 
| Physiotherapy | 70 | 
| Plastic surgery | 49806 | 
| Podiatric Surgery | 432 | 
| Podiatry | 1048 | 
| Poisons unit | 110 | 
| Programmed Pulmonary Rehabilitation | 0 | 
| Prosthetics | 0 | 
| Psychiatric Intensive Care | 4 | 
| Psychotherapy | 19 | 
| Radiology | 734 | 
| Radiotherapy | 72 | 
| Rehabilitation | 4424 | 
| Respiratory Medicine | 3391 | 
| Respiratory Physiology | 1834 | 
| Respite care | 18 | 
| Restorative dentistry | 380 | 
| Rheumatology | 10412 | 
| Specialist Rehabilitation Service | 17 | 
| Speech and Language Therapy | 2 | 
| Spinal Injuries | 241 | 
| Spinal Surgery Service | 4957 | 
| Spinal paralysis | 4 | 
| Sport And Exercise Medicine | 11 | 
| Stroke Medicine | 7456 | 
| Thoracic medicine | 34964 | 
| Thoracic surgery | 4706 | 
| Transient Ischaemic Attack | 259 | 
| Transplantation surgery | 766 | 
| Trauma & orthopaedics | 161963 | 
| Tropical medicine | 86 | 
| Upper gastrointestinal surgery | 11811 | 
| Urology | 91943 | 
| Vascular surgery | 11743 | 
| Well babies | 0 | 
| Young Chronic Sick | 4 | 
| Integrative care | 8 | 
| Convalescence | 13 | 
| TB respiratory | 5 | 
| Staff wards | 3 | 
| Other maternity event | 20 | 
| Orthotics | 3 | 
| Dementia Assessment Service | 1 | 
| Bariatric Surgery Service | 9 | 
| Trauma Surgery Service | 155 | 
| Oral and Maxillofacial Surgery Service | 321 | 
| Acute Internal Medicine Service | 1638 | 
| Orthopaedic Surgery / Services | 196 | 
| Endocrine Surgery Service | 20 | 
| Orthogeriatric Medicine Service | 3 | 
| Special Care Dentistry Service | 1 | 
| Sleep Medicine Service | 1 | 
| Gastrointestinal Physiology Service | 16 | 
| General Psychiatry | 480 |