A Study of Nemtabrutinib in Participants With Moderate Hepatic Impairment (MK-1026-015)

Inclusion Criteria: * Has a body mass index (BMI) between 18.0 and 40.0 kg/m2, inclusive. * Is assigned male or female sex at birth. Participants assigned female sex at birth must not be pregnant or breast feeding and must be of nonchild bearing potential. * Who agrees to use contraception. * Has provided documented informed consent for the study. * Has a diagnosis of chronic (\>6 months), stable (no acute episodes of illness within the previous 2 months due to deterioration in hepatic function) hepatic impairment with features of cirrhosis due to any etiology (moderate HI only). * Has moderate hepatic impairment (class B) by the Child-Pugh classification system AND/OR the participant has moderate impairment by the National Cancer Institution Organ Dysfunction Working Group (NCI-ODWG) classification system (moderate HI only). * Is in general good health (except for Moderate HI). Exclusion Criteria: * Has a clinically significant condition that may affect absorption of the study drug in the opinion of the investigator, including gastric restrictions and bariatric surgery (eg, gastric bypass). * Is mentally or legally incapacitated, has significant emotional problems at the time of prestudy (screening) visit or expected during the conduct of the study or has a history of clinically significant psychiatric disorder of the last 5 years. * Has a history of cancer (malignancy). * Has a history of significant multiple and/or severe allergies (eg, food, drug, latex allergy), or ha…