UB04 Admission Hour Code 18: 06:00 PM - 06:59 PM

Introduction

Admission Hour Code 18 indicates that a patient was formally admitted to the facility during the 6:00 PM hour (18:00 to 18:59). This code is reported in Field 13: Admission Hour.

Usage

This code is used by institutional providers to document the specific hour of a patient's arrival or the start of inpatient care. It applies to all inpatient admissions and is critical for tracking facility utilization and patient flow during the evening shift.

Billing Impact

While the admission hour itself does not typically change the DRG assignment, it is essential for claim validation and can impact the calculation of the first day of room and board charges.