National Chlamydia Screening Programme (NCSP)

Information, data, guidance and resources about the NCSP.

Chlamydia is the most common bacterial sexually transmitted infection, with sexually active young people at highest risk. As chlamydia often has no symptoms and can have serious health consequences (such as pelvic inflammatory disease, ectopic pregnancy and tubul factor infertility) opportunistic screening remains an essential element of good quality sexual health services for young adults.

Further information on chlamydia is available from NHS.UK.


National chlamydia screening programme (NCSP)

HIV / STI department, Public Health England
61 Colindale Avenue


Programme overview

A substantial proportion of all young adults become infected with chlamydia in a year. The aim of the National Chlamydia Screening Programme (NCSP) is to control chlamydia through early detection and treatment of asymptomatic infection, so reducing onward transmission and the consequences of untreated infection.

  1. NCSP: programme overview
  2. Chlamydia screening: evidence summary and briefing
  3. NCSP: re-testing of positive chlamydia cases report


Public Health England (PHE) collects data on all chlamydia tests undertaken in England from NHS laboratories, local authorities and NHS commissioned laboratories, to measure screening activity.

Chlamydia activity data reported by PHE are based on primary care and community service chlamydia data from CTAD Chlamydia Surveillance System, and chlamydia data from GUMCAD STI Surveillance System.

Sexual and Reproductive Health Profiles

Public Health Outcome Framework data tool

Chlamydia diagnosis rate indicator: summary of revised rate (June 2013)

Annual chlamydia diagnosis rate: frequently asked questions

PHE: protection of personal information and data

Commissioning and provider guidance

  1. NCSP: chlamydia care pathway
  2. Chlamydia Testing Activity Dataset: commissioning guidance
  3. Chlamydia: commissioning internet based screening
  4. Public health services non-mandatory contract
  5. Chlamydia: integrating screening into primary care and sexual health services
  6. Chlamydia screening in general practice and community pharmacies
  7. Chlamydia detection rate: considerations for commissioning
  8. NCSP: chlamydia re-testing discussion guide
  9. NCSP: chlamydia re-testing models of practice
  10. Commissioning Sexual Health Services and Interventions: Best Practice Guidance for Local Authorities
  11. A Framework for Sexual Health Improvement in England
  12. NCSP: text messaging for test results communication

Quality assurance (QA)

The NCSP is committed to supporting the highest possible standards in the commissioning and provision of chlamydia screening. The NCSP Quality Assurance (QA) framework sets out the NCSP strategy for QA.

Past reports are available from the archived NCSP website.

  1. NCSP: lessons learned reports
  2. NCSP: audit reports and tools
  3. NCSP: standards
  4. NCSP: incidents reporting policy
  5. NCSP: quality assurance (QA) framework

Programme materials

Downloadable versions of the compulsory Patient Information Leaflet and other materials are available to support marketing of the National Chlamydia Screening Programmes (NCSP) locally.

Materials can also be downloaded from the campaign resources page at the NHS Choices Sexual Health Professional website.

  1. NCSP: patient information leaflets

Pilots and studies

Collection of information relating to NCSP pilots and studies with results.

  1. NCSP: web survey report
  2. NCSP: 3Cs and HIV programme
Published 1 January 2003
Last updated 18 July 2017 + show all updates
  1. Added the ‘NCSP: incidents reporting policy’ under QA.
  2. First published.