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Unformatted text preview: for patients with terminal illnesses and not expected to live longer than six months. Outpatient services are meant for patients that do not require overnight stay for care. When coding for inpatient and outpatient services there are differences that affect the process. First of all in an inpatient service, you use the diagnosis after study first in the coding process. In outpatient services you code the reason for visit first and the diagnosis after study last. Inpatient coding uses the ICD-9-CM volumes 1, 2, and 3. Outpatient services use volume 1 and 2 but the CPT code for procedure codes. If someone were to be confused during the process of coding and mix them up, the claim could be denied and the practice could be audited. It is important to understand the rules for inpatient and outpatient coding to have clean claims....
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- Spring '11