OBJECTIVES: Consensus techniques, such as the Delphi, nominal group and elicitation panel techniques, are increasingly used in healthcare situations where there is incomplete knowledge. However, their use in support of HTAs has not been documented. As such, the objective of this review was to assess the use of consensus techniques to inform UK HTAs. METHODS: A search of the websites of the UK HTA bodies AWMSG, NICE and SMC was conducted using the terms ‘consensus’, ‘delphi’, ‘elicitation’ and ‘nominal’. The search was limited to appraisals conducted in 2013–2015 and only technology appraisal documents (AWMSG secretariat appraisal reports, NICE technology appraisal guidance and SMC detailed advice documents) were included. RESULTS:  A total of 73 appraisals met the inclusion criteria and were assessed for eligibility. Of these, 64 were excluded due to lack of relevance. Of the nine appraisals reporting the use of consensus techniques, one was conducted in 2013, four in 2014 and four in 2015. One was a NICE STA, four were AWMSG appraisals and four were SMC appraisals. In all nine appraisals, consensus techniques informed the health economic model; in six cases to inform resource use (two of which also informed the use of comparators) and in three cases to elicit utility values. Five of the appraisals were of medicines that satisfied orphan or ultra-orphan criteria. CONCLUSIONS:  The reported use of consensus techniques to inform UK HTAs increased between 2013 and 2015. During this period, AWMSG and SMC reported the use of consensus techniques more frequently than NICE. In all cases, these techniques were used to inform health economic aspects, where there may be a paucity of high-quality evidence compared with clinical aspects. The majority of appraisals that reported the use of consensus techniques were for orphan/ultra-orphan medicines, reflecting a potential lack of evidence in such therapy areas.