Psychiatrist vs psychologist vs therapist: what is the difference?

Why the difference matters

The titles used in private mental health care are not interchangeable. They reflect different training, different regulation and, crucially, different powers — only some professionals can prescribe medication, and only some are legally protected titles.

Psychiatrist

A psychiatrist is a medical doctor who has completed further specialist training in psychiatry. In the UK they are registered with the General Medical Council (GMC), and those on the specialist register have completed approved higher training. Many are members or fellows of the Royal College of Psychiatrists.

Because they are doctors, psychiatrists can assess physical as well as mental health factors, order investigations and prescribe medication. A private psychiatric assessment usually results in a written report setting out their clinical opinion and any recommendations.

Practitioner psychologist

"Practitioner psychologist" — including "clinical psychologist" and "counselling psychologist" — is a protected title in the UK. Practitioner psychologists must be registered with the Health and Care Professions Council (HCPC), and you can check any registration free on the HCPC register.

Psychologists are not medical doctors and, with very limited exceptions, do not prescribe. They typically carry out psychological assessment and formulation, and deliver evidence-based psychological therapy.

Psychotherapist and counsellor

"Psychotherapist" and "counsellor" are not currently protected titles in UK law, which means the training behind them can vary considerably. Many reputable practitioners choose to join an accredited voluntary register — for example, registers accredited by the Professional Standards Authority, such as those run by the BACP, UKCP or NCPS. Membership of an accredited register is a meaningful signal: it indicates minimum training standards, supervision, insurance and a complaints route.

CBT therapist

A cognitive behavioural therapist delivers CBT, a therapy recommended by NICE for a number of conditions. Many are accredited by the BABCP. Some are also nurses, psychologists or counsellors by background.

Mental health nurse

A registered mental health nurse is registered with the Nursing and Midwifery Council. Some nurses complete additional training as independent prescribers, which allows them to prescribe within their competence.

Who can prescribe?

Prescribing is limited to doctors and to other professionals who hold a recognised prescribing qualification, such as independent prescribing nurses and pharmacists. If medication is part of what you are looking for, check explicitly whether the service includes a prescriber — not simply whether it mentions "medication".

How to check anyone's registration

Every UK statutory register is searchable online and free to use: the GMC for doctors, the HCPC for practitioner psychologists, and the NMC for nurses. For counsellors and psychotherapists, check the relevant accredited register directly. A provider that is reluctant to give you a registration number is a provider worth questioning.