Abstract We evaluated changes in patient‐reported outcomes and cognitive function from pre‐ to 3–6 months post‐treatment among 42 newly diagnosed patients with multiple myeloma undergoing transplant with complete data using PROMIS‐29. There were statistically significant improvements in physical (p < .001) and mental health (p < .001) but not cognition from pre‐treatment to 3–6 month follow‐up. Similar results were seen within age or comorbidity strata. Patients with myeloma undergoing transplant experienced generally improved short‐term health outcomes with no significant declines in cognition.