Had to look it up:

iatrogenesis noun Save Word To save this word, you'll need to log in. Log In iat·​ro·​gen·​e·​sis | \ (ˌ)ī-ˌa-trō-ˈje-nə-səs
Definition of iatrogenesis : the unintentional causation of an unfavorable health condition (such as disease, injury, infection, or an adverse drug reaction) during the process of providing medical care (such as surgery, drug treatment, hospitalization, or diagnostic testing) In some instances, iatrogenesis resulting from polypharmacy can be managed by clinician-patient discussion … — Brandon May The first principle of healing is to avoid iatrogenesis. But what helps one patient may harm another—most treatments we apply present potential hazard. — Jon Marini

In other words, it is the leading cause of death in the USA: medical malpractice.