Русско-англо-русский юридический словарь

However, prior to starting the booking he emailed Angard explaining that he could not work night shifts because of his “health condition”. (RMT, Legal Update Autumn 2018)

He had to stop working toward a master’s degree because of his health condition. (V. P. v. Minister of Employment and Social Development, Government of Canada)

Because of his health condition, the Claimant was unable to carry out these duties, and this led to problems for the Respondent who had to arrange cover for the work. (BCR Law website)

A health condition is another term for illness, disability or disease. Congestive heart failure, high cholesterol, diabetes, multiple sclerosis, Parkinson's disease, scoliosis, even erectile dysfunction, are all examples of health conditions. (Quora)