Hospitalization Dates & Patient Account Number | Medicare Billing: CMS-1500 & 837P

These slides show you how to enter dates related to hospitalization and patient account numbers.

Loop 2300 DTP / Item 18

Complete when a medical service is furnished because of, or after, a related hospitalization.

Table 18: Loop 2300 DTP / Item 18 Fields
Hospitalization Dates Related to Current Services	Source
Enter an 8-digit (MMDDCCYY) or a 6-digit (MMDDYY) date when a medical service is furnished due to, or after, a related hospitalization. For the 837P, use the 2300 DTP Admission Date and 2300 DTP Discharge Date.	Patient records

Loop 2300 CLM01 / Item 26

This field is optional to help the health care professional or supplier identify patients. As a courtesy, Medicare returns account numbers entered in this field to the health care professional or supplier.

Table 19: Loop 2300 CLM01 / Item 26 Fields
Patient Account Number	Source
Enter the patient’s account number assigned by the provider of service or supplier’s accounting system. In the 837P, Loop 2300 CLM01 is called Patient Control Number.	Provider or supplier’s records