UB04 Admission Hour Code 00: 12:00 Midnight - 12:59 AM

Introduction

Admission Hour Code 00 represents the specific time window of 12:00 Midnight through 12:59 AM. This code is reported in Field 13: Admission Hour to document the exact hour a patient was formally admitted to the facility for inpatient or outpatient services.

Usage

This code is used by acute care hospitals, skilled nursing facilities, and other institutional providers to track the start of a patient's stay during the first hour of the calendar day. It is essential for calculating the initial length of stay and determining the correct date of service for the first billable day.

Billing Impact

Accurate reporting of the admission hour ensures proper room and board charges and prevents claim rejections due to timing inconsistencies between the admission date and the clinical record.