The aim of this study was to identify potential implementation interventions to increase the uptake of shared decision making (SDM) in clinical practice in New South Wales (NSW) Health. The Agency for Clinical Innovation hosted a full-day SDM masterclass in May 2017 and 53 attendees completed a survey to identify barriers to implementing SDM. The Theoretical Domains Framework, COM-B ('capability', 'opportunity', motivation' and 'behaviour') Model and Behaviour Change Wheel were used to conduct a theoretical analysis of the barriers and identify potential interventions to increase the uptake of SDM. This was supplemented by a purposive review of articles about current international efforts to facilitate SDM. From the theoretical analysis, 9 of the 14 theoretical domains were considered relevant to implementing SDM in the NSW Health context. Multi-faceted interventions including education, training, enablement, modelling, incentivisation, persuasion and environmental restructuring were identified as potential ways to increase SDM. The review of international articles identified communication and marketing, patient and public involvement, research, training, legislation, patient decision aids, service provision, clinical champions, financial incentives and policy as interventions being used to increase the uptake of SDM internationally. Based on current perceptions about barriers for SDM implementation in NSW Health, initial efforts should focus on workforce skills development, motivation, communication and marketing, service provision and creating receptive work environments. Investments into facilitating SDM will require an ongoing commitment to enhancing patient experience, evidence translation and reducing unwarranted variations in care. What is known about the topic?: Shared decision making is considered an important strategy for reducing unwarranted variation in health care and promoting person-centred care. Despite a growing evidence base, uptake in Australia has been slow. What does this paper add?: A description of the theoretical methods and results used to identify potential implementation interventions to increase the uptake of shared decision making clinical practice in New South Wales Health, Australia. What are the implications for practitioners?: Learnings from this present case study may be relevant to other organisations wanting to support a culture of shared decision making and meet the National Safety and Quality Healthcare Standards in Australia.