CMS Manual System

n666 remark code Remittance Advice Remark Codes (RARCs) are used to provide additional explanation for an adjustment already described by a Claim Adjustment Reason Code (CARC) or to convey information about remittance processing..

n666ds crash  Remark Code N666 means that only one evaluation and management code at this service level is covered during the course of care. This code is used to indicate that the claim has been denied or adjusted due to the limitation on coverage for evaluation and management services.

n666 remark code description  Remark code N666 indicates that only one evaluation and management code at this service level is covered during the care course.