Medicare Transmittals and Updates

CMS Transmittals

Published December 28th, 2023

Detected March 13th, 2026

Summary

The Centers for Medicare & Medicaid Services (CMS) has issued several transmittals and updates for Medicare in late December 2023. These documents provide guidance on coding, payment systems, and policy clarifications for healthcare providers. Key updates include changes to ICD-10, IVIG items, ACO REACH model APIs, and the ASC payment system.

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What changed

The Centers for Medicare & Medicaid Services (CMS) has released a series of transmittals and updates impacting Medicare providers. These documents, issued in late December 2023, cover a range of topics including International Classification of Diseases (ICD-10) coding, implementation of new Home Intravenous Immune Globulin (IVIG) items, support for the ACO REACH Model via APIs, and updates to the Ambulatory Surgical Center (ASC) Payment System. Specific transmittal numbers and their subjects are detailed, with implementation dates often falling in early 2024.

Healthcare providers must review these transmittals to ensure compliance with updated coding, billing, and operational requirements. Key implementation dates are provided, with many taking effect in January 2024. Failure to adhere to these updated guidelines could result in claim rejections or payment adjustments. Providers should consult the specific transmittal documents for detailed instructions and any associated educational materials.

What to do next

Review Medicare transmittals issued in late December 2023 for relevant updates.
Ensure compliance with updated coding, billing, and operational requirements based on transmittal guidance.
Note implementation dates, many of which are in early 2024, for affected policies.

Source document (simplified)

2023 Transmittals

Displaying 1 - 10 of 436 Show entries: 5 per page 10 per page 25 per page 50 per page 100 per page -- All -- Filter On
| Transmittal # | Issue Date | Subject | Implementation Date | CR # | Provider Education | Provider Education Release Date | Provider Education Revision Date |
| --- | --- | --- | --- | --- | --- | --- | --- |
| R12444OTN |
2024-01-04
| International Classification of Diseases, 10th Revision (ICD-10) and Other Coding… |
2024-01-02
| 13278 | MLN Matters Article MM13278 |
2023-08-09
|
2024-01-04
|
| R12191CP |
2024-01-02
| Implement Operating Rules - Phase III Electronic Remittance Advice (… |
2024-01-02
| 13303 | | | |
| R12437CP |
2023-12-28
| Implementation of the New Home Intravenous Immune Globulin (IVIG) Items and… |
2024-01-02
| 13217 | MLN Fact Sheet | |
2024-01-03
|
| R12051DEMO |
2023-12-28
| Create APIs to Support ACO REACH Model - Full Agile Pilot |
2024-01-02
| 12969 | | | |
| R12436MSP |
2023-12-28
| Update to Internet Only Manual 100-05, Chapter 2, Section 40.2 to Clarify the Liability… |
2024-01-29
| 13475 | | | |
| R12435CP |
2023-12-28
| Update to the Internet Only Manual (IOM) Publication (Pub.) 100-04, Chapter 18, Sections 20.2,… |
2024-01-29
| 13461 | | | |
| R12343CP |
2023-12-28
| Quarterly Update to the National Correct Coding Initiative (NCCI) Procedure-to-Procedure (PTP)… |
2024-04-01
| 13479 | MLN Connects® Newsletter Message |
2024-03-07
| |
| R12420CP |
2023-12-21
| January 2024 Update of the Ambulatory Surgical Center (ASC) Payment System |
2024-01-02
| 13481 | MLN Matters Article MM13481 |
2023-12-21
| |
| R12419CP |
2023-12-21
| January 2024 Integrated Outpatient Code Editor (I/OCE) Specifications Version 25.0 |
2024-01-02
| 13456 | MLN Connects Newsletter Message |
2024-01-04
| |
| R12418CP |
2023-12-21
| Updates to Medicare Benefit Policy Manual and Medicare Claims Processing Manual for Opioid… |
2024-01-24
| 13470 | | | |
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