Appropriately reporting the line item date of service (LIDOS)

The Centers for Medicare & Medicaid Services (CMS) recently published instructions in Transmittal 199, regarding outpatient claims that do not contain a line item date of service for each revenue code. CMS has stated that these claims will be rejected and that an appropriate error message will be provided. Data provided by the LIDOS allows CMS to accurately attribute the costs of packaged services and items to the procedure for which they are used and paid under the hospital OPPS. CMS also relies on the LIDOS to prevent duplications of payments for bundled services. It is vital that outpatient...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This brief CMS-focused article covers instructions for outpatient claims reporting related to line item date of service requirements. It explains the general purpose of the guidance, the claim types affected, and the relevance for hospital outpatient payment processing and claim acceptance. The article is useful for billing and coding staff who work with outpatient hospital claims and want to understand the reporting expectations discussed by CMS.

Why This Topic Matters

Accurate line item dating affects whether outpatient claims are accepted and how payment data are attributed under hospital outpatient payment systems. The topic is especially relevant for claim submission workflows that involve revenue codes and HCPCS reporting.

What You Will Learn

  • What CMS guidance says about outpatient claim line item date reporting
  • Why accurate date reporting matters for hospital outpatient claim processing
  • Which general claim scenarios are affected by the guidance
  • How the article frames the relationship between reporting and claim acceptance

Who Should Read This

  • Hospital outpatient billing staff
  • Medical coders
  • Revenue cycle personnel
  • Claims processors
  • Compliance staff

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