The Referral to Treatment (RTT) operational standards are that 90 per cent of admitted and 95 percent of non-admitted patients should start consultant-led treatment within 18 weeks of referral. In order to sustain delivery of these standards, 92 per cent of patients who have not yet started treatment should have been waiting no more than 18 weeks.
Complete guidance
RTT Calculation guidance:- http://www.england.nhs.uk/statistics/statistical-work-areas/rtt-waiting-times/rtt-guidance/
This is the part of a PATIENT PATHWAY covered by Measured Referral to Treatment Period.
There are 17 RTT statuses, they are listed here
Other links:- http://www.ruh.nhs.uk/Training/support/Millennium/RTT/index.asp#3
RTT Data collection
The main RTT data collection return (unadjusted data) has three parts:
Part 1a – Completed RTT waiting times for admitted patients – i.e. RTT waiting times for patients whose RTT clock stopped during the month with an inpatient/day case admission
Part 1b – Completed RTT waiting times for non-admitted patients – i.e. RTT waiting times for patients whose RTT clock stopped during the month for reasons other than an inpatient/day case admission
Part 2 – Incomplete RTT waiting times – i.e. RTT waiting times for patients whose RTT clock is still running at the end of the month
The adjusted RTT data collection return has one part: Completed RTT waiting times for admitted patients on an adjusted basis – i.e. RTT waiting times for patients whose RTT clock stopped during the month with an inpatient/day case admission including adjustments for legitimate clock pauses
The RTT data collection has ISB approval. It also has Monitor approval, which means that the data collection is also mandatory for NHS Foundation Trusts.
http://www.england.nhs.uk/statistics/wp-content/uploads/sites/2/2013/04/RTT-FAQs-v10-Oct-2012.pdf