Background: Establishing an information-sharing system between medical professionals and welfare/care professionals may help prevent heart failure (HF) in community-dwelling older adults. Therefore, we aimed to identify the ICF categories necessary for care managers to develop care plans for older patients with HF. Methods: A questionnaire was administered to 695 care managers in Hiroshima, Japan, on ICF items necessary for care planning. We compared the care managers according to their

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... ies (medical and welfare). Furthermore, we created a co-occurrence network using text mining, regarding the elements necessary for collaboration between medical and care professionals. Results: There were 520 valid responses (74.8%). Forty-nine ICF items, including 18 for body functions, one for body structure, 21 for activities and participation, and nine for environmental factors, were classified as "necessary" for making care plans for older people with HF. Medical professionals more frequently answered "necessary" than care professionals regarding the 11 items for body functions and structure and three items for activities and participation (p<0.05). Medical–welfare/care collaboration requires (1) information sharing with related organisations; (2) emergency response; (3) a system of cooperation between medical care and non-medical care; (4) consultation and support for individuals and families with life concerns, (5) management of nutrition, exercise, blood pressure and other factors, (6) guidelines for consultation and hospitalisation when physical conditions worsen.Conclusions: Our findings showed that 49 ICF categories were required by care managers for care planning, and there was a significant difference in perception between medical and welfare/care professionals.