​​What are Primary Care Data and Secondary Care Data​?

As many people's first point of contact with the NHS, around 90 per cent of patient interaction is with primary care services. In addition to GP practices, primary care covers dental practices, community pharmacies and high street optometrists. Primary Care Data relates to information which has been sourced from these types of services. 
Secondary Care covers treatment and care of a specialised medical service by Clinicians, for example, specialist doctors and nurses, within a health facility or hospital on referral by a primary care clinician (e.g. your GP). Secondary Care data relates to information which have been sourced from these types of services.