PSI 15 measures the hospital's risk-adjusted rate of accidental punctures and lacerations. PSI 15 has the highest weight in the PSI 90 composite under both the Hospital-Acquired Condition Program and the Hospital Value Based Purchasing Program. Coders and CDI specialists can improve performance for PSI 15 by ensuring complete documentation and correct ICD-9-CM code assignment for PSI 15?pertinent inclusions, exclusions, and risk adjustment variables.