Knowledge Base Article

CMS finalized several changes to the Major Diagnostic Category (MDC) 05: Diseases and Disorders of the Circulatory System for FY 2024. This article focuses on the finalized changes in MDC 5. You can read about finalized changes in other MDCs in a related article in this week’s newsletter.

Surgical Ablation

A request was made for CMS to review the MS-DRG assignment of cases involving open concomitant surgical ablation procedures, recommending that open concomitant surgical ablation procedures for atrial fibrillation (AF) be reassigned from MS-DRGs 219, 220, and 221 (Cardiac Valve and Other Major Cardiothoracic Procedures without Cardiac Catheterization with MCC, with CC, and without CC/MCC, respectively) to MS-DRGs 216, 217, and 218 or create new MS-DRGs for all open mitral or aortic valve repair or replacement procedures with concomitant surgical ablation of AF.

Analysis showed that these cases require greater resources, have higher average costs and generally longer lengths of stay compared to all other cases in their assigned MS-DRG. Based on this analysis, CMS finalized their proposal to create a new base MS-DRG 212 (Concomitant Aortic and Mitral Valve Procedures) for cases reporting an aortic valve repair or replacement procedure, a mitral valve repair or replacement procedure, and another concomitant procedure in MDC 05.

In response to comments that the logic intent for assignment to new MS-DRG 212 was not clear. CMS clarified that cases reporting: (1) aortic valve repair or replacement procedure; (2) a mitral valve repair or replacement procedure; and (3) at least one other concomitant procedure, as defined in the GROUPER logic, would be assigned to new MS-DRG 212.

External Heart Assist Device

Currently, the three ICD-10-PCS procedure codes describing the insertion of a short-term heart assist device are recognized as extensive O.R. procedures assigned to MS-DRG 215 (Other Heart Assist System Implant) in MDC-05. Procedure code 02HA0RZ (Insertion of short-term external heart assist system into heart, open approach) describes an open approach. The other two procedure codes describe a percutaneous approach.

CMS has finalized their proposal to reassign the open approach procedure code when reported as a standalone procedure from MS-DRG 215 in MDC-05 to Pre-MDC MS-DRGs 001 and 002. Effective October 1, 2023, procedure code 02HA0RZ code will no longer need to be reported as a part of a procedure code combination or procedure code “cluster” to satisfy the logic assignment for MS-DRGs 001 and 002.

Ultrasound Accelerated Thrombolysis (UAST) for Deep Vein Thrombosis

A request was made to reassign cases reporting USAT of peripheral vascular structures procedures with the administration of thrombolytic(s) for deep venous thrombosis from MS-DRGs 252, 253, and 254 (Other Vascular Procedures with MCC, with CC, and without CC/MCC, respectively) to MS-DRGs 270, 271, and 272 (Other Major Cardiovascular Procedures with MCC, with CC, and without CC/MCC, respectively).

CMS found this subset of cases did not clinically align with patients undergoing surgery for acute myocardial infarction. However, the identified difference in resource consumption did warrant creating a new MS-DRG to reflect more appropriate payment for USAT and standard catheter-directed thrombolysis (CDT) procedures of peripheral vascular structures. CMS finalized their proposal to create new MS-DRGs 278 and 279 (Ultrasound Accelerated and Other Thrombolysis of Peripheral Vascular Structures with MCC and without MCC, respectively).

Coronary Intravascular Lithotripsy

A request was made to review MS-DRG assignment of cases describing percutaneous intravascular lithotripsy (IVL) involving the insertion of drug eluting and non-drug eluting stents. According to the requestor, cases involving IVL are more complex as this is a therapy deployed exclusively in several calcified coronary lesions that are associated with longer procedure times and increased resources.

CMS analysis showed that cases reporting percutaneous coronary IVL, with or without a stent had higher average costs and lengths of stay. CMS finalized their proposal to create MS-DRGs 323 and 324 (Coronary Intravascular Lithotripsy with Intraluminal Device with MCC and without MCC, respectively), and MS-DRG 325 (Coronary Intravascular Lithotripsy without Intraluminal Device).

Eliminating Distinction Between Bare-Metal and Drug-Eluting Stent (DES)

CMS noted in the proposed rule that it appears to no longer be necessary to subdivide the MS-DRGs for percutaneous cardiovascular procedures based on the type of coronary intraluminal device inserted. After consideration of public comments, CMS finalized their proposals to

• Delete MS-DRGs 246, 247, 248, and 249,
• Create new MS-DRG 321 (Percutaneous Cardiovascular Procedures with Intraluminal Device with MCC or 4+ Arteries/Intraluminal Devices) and MS-DRG 322 (Percutaneous Cardiovascular Procedures with Intraluminal Device without MCC),
• Reassign procedure codes from current MS-DRGs 246, 247, 248, and 249 to the new MS-DRGs 321 and 322, and
• Revise the titles for MS-DRGs 250 and 251 from “Percutaneous Cardiovascular without Coronary Artery Stent with MCC, and without MCC, respectively” to “Percutaneous Cardiovascular Procedures without Intraluminal Device with MCC, and without MCC, respectively” to better reflect the ICD-10-PCS terminology of “intraluminal devices” versus “stents” as used in the procedure code titles within the classification.

Cardiac Defibrillators and Shock

During a review of cardiogenic shock, CMS noted data analysis shows the average costs and length of stay are generally similar for cardiac defibrillator cases without regard to the presence of AMI, Heart Failure (HF), or shock. CMS finalized their proposals to:

• Delete MS-DRGs 222, 223, 224, 225, 226, and 227,
• Create three new MS-DRGs: MS-DRG 275 (Cardiac Defibrillator Implant with Cardiac Catheterization and MCC, and MS-DRGs 276 and 277 (Cardiac Defibrillator Implant with MCC, and without MCC, respectively), and
• Specific to MS-DRG 275, designate procedure codes describing cardiac catheterization as non-O.R. procedures affecting the MS-DRG.

The finalized changes go into effect October 1, 2023.

Resource: FY 2024 IPPS Final Rule (CMS-1785-F) webpage at https://www.cms.gov/medicare/acute-inpatient-pps/fy-2024-ipps-final-rule-home-page