House officer (previously often called a houseman) may refer to:
- Foundation house officer, a doctor in the first two years after qualification in a British hospital, introduced in 2005
- Pre-registration house officer, a British hospital doctor in the first year after qualification, phased out in 2005
- Senior house officer, a British hospital doctor in the second and third years after qualification, phased out in 2005
- A physician undergoing residency training in a hospital
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