UB04 Admission Hour Code 20: 08:00 PM - 08:59 PM

Introduction

Admission Hour Code 20 indicates that a patient was formally admitted to the facility during the evening window of 08:00 PM to 08:59 PM. 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 admission based on a 24-hour clock. It applies to all inpatient stays and certain outpatient observations where the time of the physician's admission order is recorded as occurring between 20:00 and 20:59.

Billing Impact

While the admission hour itself does not typically change the DRG assignment, accurate reporting is essential for medical necessity audits and calculating the correct length of stay for per-diem reimbursement.