•Geriatric assessment can identify impairments in stem cell transplant candidates•Impairments can be found in older (>60 years) as well as younger (18-59) candidates•Identifying impairments can facilitate referrals and resolution of impairments•Geriatric assessment may help stem cell transplant candidates of all ages•KEY POINTS•Geriatric assessment can identify impairments in adult patients of all ages undergoing an allogeneic hematopoietic stem cell transplant.•Identification of impairments before transplant can facilitate referrals to supportive care and may improve transplant outcomes.