| K L Oaksford | Royal Free Hospital | NW3 2QG | London |
| Carolyne Oates | Carolyne Oates Occupational Therapy... | RG7 4LH | Aldermaston |
| Joanna Oates | Joanna Oates Nutritional Therapy Clinic | W3 8AW | London |
| Alexandra Obradovich | Alexandra Obradovich Reflexology Clinic | N1 0ES | London |
| Maureen O'Brien | Maureen O'Brien Reflexology Clinic | N8 0ET | London |
| Frances O'Brien | Frances O'Brien Art Therapy Centre | DE72 3BH | Derby |
| Joe O'Brien | Joe O'Brien Occupational Therapy Clinic | TS5 6HR | Middlesbrough |
| Rita O'Brien | Rita O'Brien Acupuncture Clinic | WC1N 3HR | London |
| Fionnuala O'Brien | Beaumont Street Chirpractic Clinic | OX1 2NY | Oxford |
| Celia O'Brien | Celia O'Brien Psychotherapy Clinic | SE4 1YB | London |
| Celia O'Brien | Celia O'Brien Psychotherapy Clinic | | South East London |
| H A O'connor | Leigh House Hospital | SO21 1HD | Winchester |
| J H P O'Connor | J H P O'Connor Psychology Clinic | LE7 9EG | Leicester |
| Amanda O'Connor | Pitshanger Osteopathic Practice | W51QY | London |
| Annie O'Dell | Annie O'Dell Reflexology Clinic | SW17 7DG | London |
| Annie O'Dell | Annie O'Dell Aromatherapy Clinic | SW17 7DG | London |
| Lorraine Odiari | Lorraine Odiari Acupuncture Clinic | NW3 4BL | London |
| Rebecca O'Donnell | Rebecca O'Donnell Reflexology Clinic | SW12 | London |
| Niamh O'Donoghue | Healix Wellbeing Centre | N14 5BP | London |
| Joanne O'Donovan | Joanne O'Donovan Sport And Remedial... | OX5 3JQ | Kirtlington |
| N Oelofsen | The Psychology Consultancy (Uk) Ltd | IP2 8SJ | Ipswich |
| Christine O'Flaherty | Barbican Physiotherapy Clinic | EC2Y 8BJ | London |
| Brian O'Flynn | Osteopathy & Acupuncture | N22 5HP | London |
| Brian O'Flynn | Holmes Place Health Clinic | N8 8PP | London |
| Satya Ogilvy | Satya Ogilvy Hypnotherapy Clinic | W1H 7QY | London |
| Andrew Ogleby | Andrew Ogleby Acupuncture Clinic | TN4 9LT | Tunbridge Wells |
| Andrew Ogleby | Andrew Ogleby Acupuncture Clinic | SE3 7LW | London |
| Andrew Ogleby | Andrew Ogleby Acupuncture Clinic | N7 6DL | London |
| Brian Christopher O'Gorman | Brian Christopher O'Gorman... | OX1 2NY | Oxford |
| Brian Christopher O'Gorman | Brian Christopher O'Gorman... | RG9 1EX | Oxford |
| David O'Hanlon | Physiotherapy Manager General Medical... | EC2M 5NS | London |
| Yoko Ohara | Yoko Ohara Acupuncture Clinic | N4 1AE | London |
| Yoko Ohara | Yoko Ohara Acupuncture Clinic | WC1N 1AB | London |
| Patricia O'Hara | Patricia O'Hara Acupuncture Clinic | W2 5HS | London |
| Paul O'Hara | Back on Track Physiotherapy Clinic | SE6 4TF | London |
| Evelyne O'Hare | West Dorset Chiropractic Centre | DT6 3LB | Bridport |
| Margaret Ohuche | The Margaret Ohuche Practice | SE20 7XJ | London |
| Daiza Okada | Daiza Okada Reflexology Clinic | NW3 6LP | London |
| Phillis Okai | Specsavers Hearing Centre | N22 6YD | London |
| Christina O'Kane | Specsavers Hearing Centre | BT45 6ED | Magherafelt |
| Aileen O'Kane | Aileen O'Kane Ayurvedic Medicine Clinic | BT60 1EU | Armagh |
| Aileen O'Kane | Tara Centre | BT79 0AH | Tyrone |
| Leor Okrent | Finchley Osteopathy Clinic | N3 1BT | London |
| Diana Olafsdottir | Diana Olafsdottir Acupuncture Clinic | E14 9PX | London |
| Diana Olafsdottir | Diana Olafsdottir Acupuncture Clinic | EC2A 4PH | London |
| Steven Oldale | Back In Form Chiropractic Clinic | BH14 0JB | Poole |
| Elizabeth Oldham | Elizabeth Oldham Herbalism Clinic | N4 3PT | London |
| Berry O'Leary-Profit | Berry O'Leary-Profit Sport And Remedial... | | |
| Andre De Oliveira | ALO Physiotherapy Clinic | W1G 9PH | London |
| Josephine Smith Oliver | Josephine Smith Oliver Physiotherapy... | E9 7NG | London |
| Amanda Oliver | Syndale Park Sports & Leisure Centre | | Faversham |
| Daren Oliver | Daren Oliver Herbalism Clinic | GU51 3NW | Fleet |
| Daren Oliver | The Odiham Clinic | RG29 1LG | Nr Hook |
| Amanda Oliver | Gatefield Clinic | ME13 8NX | Faversham |
| Christopher Oliver | Chepstow Chiropractic Clinic | NP16 5BA | Chepstow |
| Christopher Oliver | Monmouth Chiropractic Clinic | NP25 3PS | Monmouth |
| Andrew Oliver | Highfield Chiropractic Clinic | DE22 1GW | Derby |
| Nicole Oliver | Newland Chiropractic Clinic | LN1 1YA | Lincoln |
| John Oliver | Bridgnorth Chiropractic Clinic | WV16 4BB | Bridgnorth |
| M V Oliver | M V Oliver Psychology Clinic | NN7 4DY | Northampton |
| S J Oliver | Insight2Impact | DA2 7PR | Dartford |
| Gabrielle F. A. Oliver | Gabrielle F. A. Oliver Art Therapy... | KT12 2AF | Walton-On-Thames |
| Oliver | Oliver Aromatherapy Clinic | SO21 3RS | Winchester |
| Andrew Oliver | Blackheath Physiotherapy Practice | SE3 9RT | London |
| Sarah Oliver | Ashlins Natural Health | E17 3AP | Walthamstow |
| Andrew Oliver | Greenwich Natural Health Centre | SE10 8RF | London |
| Olivier | Olivier Aromatherapy Clinic | CR2 OAE | Sanderstead |
| Ollis | Ollis Aromatherapy Clinic | BS15 15H | Bristol |
| Siegfried Alonso-Olmedo | Essential Chiropractic Clinic | RM7 9RB | Romford |
| Jan Olsen | Park View Acupuncture & Chiropractic... | BN11 2AA | Worthing |
| B M O'Mahony | B M O'Mahony Psychology Clinic | IP22 1WT | Diss |
| Kirsty O'Mailey | Cat Hill Chiropractic Clinic | EN4 8HP | Barnet |
| Anne O'malley | Anne O'malley Reflexology Clinic | W5 | London |
| Sean O'Maoltuile | Back to Life Complementary Healthcare... | CF64 2AJ | Cardiff |
| S J O'Neill | S J O'Neill Chiropody Clinic | TW3 1RH | Hounslow |
| Cherry O'Neill | | TN11 8PZ | Tonbridge Wells |
| Judith O'Neill | Judith O'Neill Occupational Therapy... | RH20 2QR | West Chiltington |
| J L O'Neill | Wednesbury And West Bromwich Community... | B70 8NJ | West Bromwich |
| Nicholas Oram | Glebe Street Chiropractic | W4 2BD | London |
| Nicholas Oram | Sunbury Chiropractic Centre | TW16 6QA | Sunbury On Thames |
| Stephen Paul Orchard | The Hearing Company | B15 1PH | Birmingham |
| Angela O'Regan | Harley Street Homeopathic Clinic | W19 9PG | London |
| S O'Riordan | S O'Riordan Psychology Clinic | RG42 3DP | Bracknell |
| Julie A Ormerod | Hearing Electronics Limited | RH13 5RG | Horsham |
| Jonathan Ormerod | Hearing Electronics Limited | RH13 5RG | Horsham |
| P J Ormerod | David Ormerod Hearing Centres | LL30 2RH | Llandudno |
| Juan Carlos Oronoz Sanz | Juan Carlos Oronoz Sanz Sport And... | | London |
| Orla O'Rourke | Orla O'Rourke Sport And Remedial... | | |
| Ian Orr | Battersea & Wandsworth Chiropractors | SW11 1TH | London |
| Fionnula Orrom | Fionnula Orrom Acupuncture Clinic | SE4 1AQ | London |
| Rachel Orton | Rachel Orton Sport And Remedial Massage... | WS13 8HE | Lichfield |
| Rachel Orton | Rachel Orton Sport And Remedial Massage... | | |
| Douglas Charles Osborne | Clinical Hypnotherapy | SW15 3PB | London |
| Kate Osborne | The Healthy Living Centre | N1 2LH | London |
| Lynn Osborne | Lynn Osborne Acupuncture Clinic | N3 1EH | London |
| Lynn Osborne | Lynn Osborne Acupuncture Clinic | NW3 4TG | London |
| J M Osborne | Consultant Counselling Psychologist | TN13 2RN | Sevenoaks |
| Neil Osborne | Anglo European College of Chiropractic | BH5 2DF | Bournemouth |
| Osei | Osei Aromatherapy Clinic | TW7 6AF | Isleworth |
| Rachel Osorio | Rachel Osorio Art Therapy Centre | SE24 0NR | London |
