NPH may refer to:
Medicine NPH insulin, an intermediate-acting insulin National Pediatric Hospital, Cambodia, a government-run pediatric hospital in Phnom Penh Normal pressure hydrocephalus, a condition of excessive fluid in the brain
Other Fujicolor Pro (previously NPH 400), a line of professional color negative films National Party of Honduras, a centre-right conservative political party in Honduras Neil Patrick Harris, American actor, singer, director and magician Negative pH (band), an Electronic music band New Phyrexia (expansion code: NPH), a Magic: the Gathering expansion set North Providence High School, a public high school in North Providence, Rhode Island Northeast Party House, an Australian electronic dance band Northwestern Publishing House, the official publishing house for the Wisconsin Evangelical Lutheran Synod Nuestros Pequeños Hermanos, a charity in Latin America that runs orphanages Nyiakeng Puachue Hmong, a writing system used for the Hmong language