Each NICE Quality Statement has a publication number.
They use this format to categorise them: QSxx. You can use this as the publication number.
If there is no document number, you can omit this information.
Quality Statement referencing example
National Institute for Health and Care Excellence. (2019). Fever in under 5s: Assessment and initial management. NICE Guideline No. 143. Available at: https://www.nice.org.uk/guidance/ng143 (Accessed: 19 February 2025)
The same method can be used to reference other NICE guidelines such as Health Technology Evaluations, Highly Specialised Technology guidance, Medical technologies guidance, Diagnostics guidance or Interventional procedures guidance.