comorbid« Back to Glossary IndexThe term comorbid refers to two or more different medical conditions, which may or may not be related, occurring at the same time.Related Articles: Diagnosing Hypersomnias Differently—A European ProposalParenthood & PregnancyHealth and Prescription Medicine Insurance DenialsVANCOUVER, BC: WUN-HF Education DaySummary of “Establishing the Objective Sleep Phenotype in Hypersomnolence Disorder [IH] with and without Comorbid Major Depression”