BackgroundEvidence suggests that management of people with Chronic Obstructive Pulmonary Disease (COPD) in primary care has been suboptimal, in particular, with low referral rates to pulmonary rehabilitation (PR). The aim of this study was to evaluate the effectiveness of a GP-physiotherapist partnership in optimising management of COPD in primary care.MethodsA pragmatic, pilot, before and after study was conducted in four general practices in Australia. A senior cardiorespiratory physiotherapist was partnered with each general practice. Adults with a history of smoking and/or COPD, aged ≥ 40 years with ≥ 2 practice visits in the previous year were recruited following spirometric confirmation of COPD. Intervention was provided by the physiotherapist at the general practice and included PR referral, physical activity and smoking cessation advice, provision of a pedometer and review of inhaler technique. Intervention occurred at baseline, one month and three months. Main outcomes included PR referral and attendance. Secondary clinical outcomes included changes in COPD Assessment Test (CAT) score, dyspnoea, health activation and pedometer step count. Process outcomes included count of initiation of smoking cessation interventions and review of inhaler technique.ResultsA total of 148 participants attended a baseline appointment where pre/post bronchodilator spirometry was performed. 31 participants with airflow obstruction on post-bronchodilator spirometry (mean age 75yrs (SD 9.3), mean FEV1% pred = 75% (SD 18.6), 61% female) received the intervention. At three months, 78% (21/27) were referred to PR and 38% (8/21) had attended PR. No significant improvements were seen in CAT scores, dyspnoea or health activation. There was no significant change in average daily step count at three months compared to baseline (mean difference (95% CI) -266 steps (-956 to 423),p= 0.43). Where indicated, all participants had smoking cessation interventions initiated and inhaler technique reviewed.ConclusionThe results of this study suggest that this model was able to increase referrals to PR from primary care and was successful in implementing some aspects of COPD management, however, was insufficient to improve symptom scores and physical activity levels in people with COPD.Trial registrationANZCTR, ACTRN12619001127190. Registered 12 August 2019 – Retrospectively registered,http://www.ANZCTR.org.au/ACTRN12619001127190.aspx.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12875-023-02097-3.