MS-DRG V43.1: 80 New Procedure Codes and What They Mean for Your Revenue Cycle

CMS is implementing 80 new ICD-10-PCS procedure codes effective April 1, 2026, packaged as MS-DRG Grouper Version 43.1. This is a mid-year update, which means shorter lead times, tighter implementation windows, and real revenue risk for hospitals that aren't ready.

This isn't a routine housekeeping release. V43.1 reflects a convergence of FDA breakthrough device approvals, legacy coding gaps that have frustrated coders for years, and CMS proactively building infrastructure for gene therapies and regenerative medicine. Here's what revenue cycle teams need to know.

The Big Picture: OR vs. Non-OR Matters

Of the 80 new codes, the split between OR and non-OR procedures is the single most important detail for revenue cycle teams to understand.

OR procedures independently drive DRG assignment. When one of these codes appears on a claim, it can change the MDC and MS-DRG regardless of the principal diagnosis. These are the codes that directly move reimbursement.

Non-OR procedures do not independently determine the DRG. Their impact depends entirely on the principal diagnosis, secondary diagnoses, and other reported procedures. Some non-OR codes are flagged as "affecting MS-DRG assignment" (marked with ** in the CMS table), meaning they can influence the grouping logic even though they don't drive it alone.

The revenue cycle action item: every new OR code needs a CDM line, a charge capture workflow, and coder education. Non-OR codes still need to be mapped, but the urgency is different.

Cardiac Device Codes: Ventricular Septum Finally Gets Its Own Body Part

New Codes: 02HM3JZ, 02HM3KZ, 02HM3MZ, 02HM3NZ, 02HM3YZ

Until this update, electrophysiologists placing leads in the ventricular septum for conduction system pacing had no accurate code. Coders were forced to report "right ventricle," which misrepresented both the anatomy and the clinical intent. CMS has now added the ventricular septum as a distinct body part in table 02H.

Revenue Cycle Impact

This is where it gets nuanced. Not all five codes carry the same weight:

• 02HM3JZ (pacemaker lead) and 02HM3MZ (cardiac lead) are non-OR procedures. They won't independently change your DRG, but they are flagged as affecting MS-DRG assignment. They map to MS-DRGs 040-042 (MDC 01), 260-262 (MDC 05), 907-909 (MDC 21), and 957-959 (MDC 24).
• 02HM3KZ (defibrillator lead), 02HM3NZ (intracardiac pacemaker), and 02HM3YZ (other device) are OR procedures that directly drive DRG assignment across MDCs 05, 14, 17, 18, 19, 23, and 25.

For hospitals with active electrophysiology programs doing conduction system pacing, the defibrillator lead code (02HM3KZ) maps to MS-DRG 265 (AICD Lead and Generator Procedures), which carries a significant relative weight. CDM teams should map this immediately.

New Technology Codes: The Largest Block

The New Technology section (Section X) dominates this update, and several codes have direct reimbursement implications.

Medtronic OmniaSecure Defibrillator Lead (X2HM3GB, X2HV3GB)

These codes capture the first lumenless defibrillation lead on the market. Two codes exist because CMS distinguished placement in the ventricular septum versus the right ventricle. Both are OR procedures mapped to MS-DRG 265 in MDC 05. The New Technology Group 11 qualifier signals potential eligibility for New Technology Add-on Payment (NTAP), though that determination happens separately in the IPPS rulemaking process.

Action item: If your EP lab is implanting OmniaSecure leads, these codes need CDM mapping before April 1. The NTAP angle makes accurate capture especially important.

Gore Viabahn Fortegra Venous Stent (X2723CB)

This single code has the broadest DRG mapping in the entire update, spanning 14 MDCs and dozens of MS-DRGs. It captures dilation of the IVC and iliocaval confluence with the Fortegra stent, an FDA Breakthrough Device approved in January 2026. As an OR procedure, it will drive DRG assignment across vascular, obstetric, trauma, and many other clinical contexts.

Action item: Because of the wide MDC spread, this code could surface in unexpected service lines. Alert coding teams across departments, not just vascular surgery.

CAR-T: Anitocabtagene Autoleucel (XW0331B, XW0431B)

Anito-cel (Arcellx/Gilead) joins the CAR-T family with two codes for peripheral and central vein administration. Both are non-OR but map to Pre-MDC MS-DRG 018, the dedicated CAR-T DRG that carries one of the highest payment weights in the system. This Pre-MDC assignment means it bypasses normal MDC logic entirely.

Action item: Oncology programs planning to offer anito-cel need these codes in their CAR-T charge capture workflows. The Pre-MDC 018 assignment means correct coding directly determines whether you capture this high-weight DRG.

Tissue-Engineered Vascular Grafts (X2K00FB, X2KG0FB)

These codes capture tissue-engineered Fontan conduits for children with single-ventricle heart disease. Both are OR procedures mapped to MS-DRGs 228-229 (Other Cardiothoracic Procedures) in MDC 05. The patient volume will be small, but these are high-acuity, high-cost cases.

Legacy Coding Gaps: Finally Fixed

Several additions address long-standing coding deficiencies. These aren't new procedures; they're procedures that finally have accurate codes.

Boari Bladder Flap (0TXB0Z6, 0TXB0Z7, 0TXB4Z6, 0TXB4Z7)

CMS created an entirely new Transfer table (0TX) for the urinary system. The Boari flap has been performed for decades, but coders had no accurate way to report it. All four codes are OR procedures mapping to MS-DRGs 656-661 in MDC 11, with broad cross-MDC coverage across 9 MDCs.

Action item: Urology coding teams should be educated immediately. If your facility has been reporting Boari flaps with workaround codes, historical data comparisons will shift.

Simple vs. Radical Prostatectomy (0VT00ZE, 0VT04ZE, 0VT07ZE, 0VT08ZE)

The new "Capsule Intact" qualifier finally distinguishes simple prostatectomy (BPH) from radical prostatectomy (cancer). These are fundamentally different procedures in terms of resource consumption, operative time, and clinical complexity.

All four codes are OR procedures. In MDC 11, they map to MS-DRGs 665-667 (Prostatectomy). In MDC 12, they map to MS-DRGs 707-708 or 713-714 depending on approach.

Action item: This distinction could affect case-mix index calculations for urology programs. CDI teams should develop query templates that clarify whether a prostatectomy preserved the capsule.

Transmural vs. Transpapillary Hepatobiliary Drainage (20 codes in 0F9 series)

Twenty new codes distinguish between transmural (EUS-guided, through the GI wall) and transpapillary (through the ampulla) endoscopic drainage across 10 biliary and pancreatic structures. All 20 are non-OR, so they won't independently change DRG assignment, but they represent a significant improvement in coding accuracy for interventional GI.

Action item: While these won't move reimbursement directly, accurate reporting supports medical necessity documentation and can influence future CMS reclassification decisions.

Omentum and Mesentery Extraction (0DDU0ZZ, 0DDU4ZZ, 0DDV0ZZ, 0DDV4ZZ)

Four new OR codes for extraction of omentum and mesentery via open and percutaneous endoscopic approaches. These are relevant for oncologic debulking (especially ovarian cancer cytoreduction) and IBD surgery. DRG mapping spans MDCs 06, 07, 10, 13, 14, and more.

Action item: Surgical oncology and colorectal coding teams should be aware. These codes could improve specificity for cases that were previously reported under less precise Excision or Resection codes.

Cardiac Output Assistance: Blood Flow Modulator (5A0221E)

A single OR code for continuous cardiac output assistance using a blood flow modulator, mapped to MS-DRGs 270-272 (Other Major Cardiovascular Procedures) in MDC 05. This reflects emerging mechanical circulatory support technologies.

Gene Therapy and Rare Disease Codes

Several codes signal CMS building infrastructure ahead of market availability:

• XW0E33B: DB-OTO gene therapy for genetic deafness (non-OR, no fixed DRG)
• X9HD01B, X9HE01B, X9HF01B: Inner ear temporary infusion devices (OR, MS-DRGs 143-145 in MDC 03)
• XW0632B: CPI-601 enzyme replacement for CLN1 Batten disease (non-OR, no fixed DRG)
• XW0534B: Somatic stem cells (non-OR, no fixed DRG)
• XW0330B, XW0430B: Alpha-1 proteinase inhibitor (non-OR, no fixed DRG)

The inner ear device codes are notable because they're OR procedures that will drive DRG assignment to MS-DRGs 143-145 (ENT OR Procedures). The rest are non-OR with no fixed assignment, meaning reimbursement is context-dependent.

Wound Management and Rehabilitation (23 codes)

Twenty-three new Section F codes cover microcurrent stimulation electrotherapy and wound management treatment. All are non-OR, mapped to MS-DRGs 945-946 in MDC 23. While individually low-impact, these codes formalize advanced wound care reporting in the inpatient setting.

Complete V43.1 Code Reference Table

The table below lists all 80 new ICD-10-PCS procedure codes with their OR status, primary MDC, and MS-DRG assignments. Codes marked with * are non-OR with no fixed MDC/DRG (assignment is context-dependent). Codes marked with ** are non-OR but affect MS-DRG assignment.

Source: CMS ICD-10 MS-DRGs Version 43.1 Web Announcement. Primary MDC and key MS-DRGs shown; many OR codes map across additional MDCs (14, 17, 18, 19, 23, 25) for secondary surgical contexts.

Implementation Checklist for Revenue Cycle Teams

With an April 1, 2026 effective date, here's what needs to happen:

1. CDM updates: Map all new OR procedure codes to charge lines. Prioritize the cardiac device codes (02HM3KZ, 02HM3NZ, 02HM3YZ), New Technology codes (X2HM3GB, X2HV3GB, X2723CB, X2K00FB, X2KG0FB), Boari flap codes, prostatectomy codes, omentum/mesentery codes, inner ear device codes, and cardiac output assistance.

2. Grouper software update: Ensure your MS-DRG Grouper is updated to V43.1. Claims with these codes submitted against V43.0 will not group correctly.

3. Coder education: Focus on the OR/non-OR distinctions. The ventricular septum cardiac codes are especially tricky because some are OR and some aren't. The prostatectomy capsule-intact qualifier requires clear documentation.

4. CDI query templates: Develop queries for capsule-intact prostatectomy documentation, transmural vs. transpapillary drainage approach, and conduction system pacing lead placement location.

5. Encoder updates: Verify your encoding software has the 80 new codes loaded with correct descriptions and OR/non-OR flags.

6. Denials preparedness: Claims straddling the April 1 effective date need careful handling. Discharges on or after April 1 should use V43.1.

Testing the New Codes

Our DRG Grouper tool is being updated to support V43.1. Once available, you can test how these new procedure codes affect MS-DRG assignment for your case mix. Enter the new codes alongside your typical diagnosis patterns to understand the reimbursement impact before go-live.

Bottom Line

V43.1 is a substantive mid-year update. The mix of high-impact OR codes (cardiac devices, venous stent, prostatectomy, Boari flap), Pre-MDC CAR-T assignment, and forward-looking gene therapy infrastructure means this isn't something to address with a memo. It requires coordinated CDM, coding, CDI, and IT action before April 1.

The hospitals that will see the most revenue impact are those with active electrophysiology, interventional GI, urology, surgical oncology, and CAR-T programs. If that's you, this update deserves a cross-functional implementation meeting, not just a coding bulletin.