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Mental Health Minimum Data Set (MHMDS) contains record level data about the care of adults and older people using secondary mental health services. This is approximately 2 million individual patients who were in touch with secondary mental health services between 2003 and 2008. The MHMDS describes a complete spell of care for an individual, from initial referral to final discharge.

Main Topics/Subject Category
Inpatients, outpatients, community care, and NHS day care episodes; mental health reviews and assessments including Care Programme Approach (CPA) and Health of Nation Outcome Scales (HoNOS); contacts with mental health professionals such as care coordinator, psychiatric nurses and consultants and also any diagnosis and treatments

Number of people using NHS mental health services, number of inpatients detained in hospital, number of people on Care Programme Approach (CPA), average length of stay in hospital per record, inpatient activity, outpatient and community activity, type of clinical team coordinating patient's care.

PCT, mental health, psychiatry, mental health services, inpatient, outpatient, community care, Programme Care Approach (CPA), number of beds, patient admissions, discharges, staff, clinical teams, psychiatric nurses, psychiatric consultant, diagnosis, treatments
Identifier Variables
SHA, PCT, NHS trust, NHS foundation trust
Economic/Subject Categories
Mental health
Area of Health System
Secondary care
Disease Area
Mental health
Data Available
Data collecting organization (s)
NHS information centre
Data Type
Coverage (date of field work)
2003, 2004, 2005, 2006, 2007, 2008
Unit of Analysis

Approximately 2 million individual patients

MHMDS online
Conditions of Access
Free access
Glover G. Adult mental health care in England. Eur Arch Psychiatry Clin Neurosci 2007; 257: 71–82