Hospital clinical pharmacy teams contribute to safer, more effective, and cost-conscious medication use. Evaluating the extent and impact of these services is vital for ensuring care quality, but conventional performance tracking through manual reporting is resource-intensive. This study investigated whether electronic medical record (EMR) progress note counts could reliably indicate clinical pharmacy activity. A sample of 300 adult patient admissions across three Australian hospitals (May–November 2021) was examined. Pharmacy-authored EMR notes were categorized according to their titles and the interventions documented. Using a manual audit as the reference standard, the validity of note counts was assessed via sensitivity, specificity, and positive predictive value. Among 861 audited notes, entries labeled PMM Medication History, PMM Medication Review, and PMM Discharge Medications exhibited strong agreement with manually verified interventions, showing high specificity and predictive accuracy (> 98%) and sensitivities of 98%, 90%, and 89%, respectively. These findings support the use of EMR progress note counts as an accurate, efficient measure of clinical pharmacy service delivery. This approach offers a scalable solution for hospitals seeking streamlined performance assessment. The study received ethical clearance from the Central Adelaide Local Health Network Human Research Ethics Committee (Ref. 16357) and the University of South Australia Human Research Ethics Committee (Ref. 205782), in line with national ethical standards.