Per CMS requirements, all CMS 2728 Forms (Patient Registration & Medicare Entitlement) must be submitted within 45 days of the patient's first outpatient ESRD treatment.

Resources:

CMS 2728 Form & Instructions (v10/2018)

ICD-10 Code List: Primary Causes of Renal Failure (v10/2018)

CMS 2728 Form Overview and FAQ

CMS 2728 & 2746 Form Completion Best Practices