Precertify is a term used in the world of healthcare to describe the process of obtaining approval from an insurance provider for a medical procedure or treatment. However, there are several synonyms for the word that can be used in different contexts. Some of these include preauthorize, pre-approve, validate, authorize, and endorse. All these synonyms imply a process of seeking approval or permission before undertaking an action or proceeding with a plan. Precertify, however, is the term most commonly used in the healthcare industry to ensure that a patient's medical needs are covered by their insurance provider.