4A020N6 ICD-10-PCS Code: Measurement of Cardiac Sampling and Pressure, Right Heart, Open Approach

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

The MS-DRG grouper treats this as a non-operating-room procedure. It appears in the surgical logic of 11 MS-DRGs:

• MDC 05 — Concomitant Aortic and Mitral Valve Procedures: DRG 212
• MDC 05 — : DRG 216, DRG 217, DRG 218, DRG 233, DRG 234
• MDC 05 — Cardiac Defibrillator Implant with Cardiac Catheterization: DRG 275
• MDC 05 — Cardiac Defibrillator Implant: DRG 276, DRG 277
• MDC 05 — Circulatory Disorders Except AMI, with Cardiac Catheterization: DRG 286, DRG 287

From the CMS MS-DRG Definitions Manual, Appendix E. Actual DRG assignment depends on the complete claim.

Related Codes

Same operation — other Approach

Same table and root operation, differing only in the approach character.

4A023N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Percutaneous Approach, 4A027N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening, 4A028N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening Endoscopic

Same operation — other Qualifier

Same table and root operation, differing only in the qualifier character.

4A020N7 — Measurement of Cardiac Sampling and Pressure, Left Heart, Open Approach, 4A020N8 — Measurement of Cardiac Sampling and Pressure, Bilateral, Open Approach

Same procedure category (CCSR), other tables

AHRQ's Clinical Classifications Software Refined groups these ICD-10-PCS procedures with this one under Measurement during cardiac catheterization (Measurement and Monitoring); listed here are the members in other PCS tables. Source: Clinical Classifications Software Refined (CCSR), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, November 2025.

4A1305C — Monitoring of Arterial Flow, Coronary, Open Approach, 4A130BC — Monitoring of Arterial Pressure, Coronary, Open Approach, 4A130JC — Monitoring of Arterial Pulse, Coronary, Open Approach, 4A1335C — Monitoring of Arterial Flow, Coronary, Percutaneous Approach, 4A133BC — Monitoring of Arterial Pressure, Coronary, Percutaneous Approach, 4A133JC — Monitoring of Arterial Pulse, Coronary, Percutaneous Approach, XXE3X58 — Measurement of Coronary Artery Flow, Quantitative Flow Ratio Analysis, New Technology Group 8, XXE3X68 — Measurement of Coronary Artery Flow, Computer-aided Valve Modeling and Notification, New Technology Group 8

Contextual Map

Every relationship of 4A020N6 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run 4A020N6 with these 5 related codes in Claim Check

PCS table

• 4A0[PCS table]— CMS ICD-10-PCS tables
• Measurement and Monitoring — Section: Measurement and Monitoring[Section]: “Measurement and Monitoring”— CMS ICD-10-PCS tables
• Physiological Systems — Body System: Physiological Systems[Body System]: “Physiological Systems”— CMS ICD-10-PCS tables
• Measurement — Operation: Measurement[Operation]: “Measurement”— CMS ICD-10-PCS tables

MS-DRG participation (11)

• DRG 212 — CONCOMITANT AORTIC AND MITRAL VALVE PROCEDURES[MS-DRG]: “CONCOMITANT AORTIC AND MITRAL VALVE PROCEDURES — Concomitant Aortic and Mitral Valve Procedures (MDC 05)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 216 — CARDIAC VALVE AND OTHER MAJOR CARDIOTHORACIC PROCEDURES WITH CARDIAC CATHETERIZATION WITH MCC[MS-DRG]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 217 — CARDIAC VALVE AND OTHER MAJOR CARDIOTHORACIC PROCEDURES WITH CARDIAC CATHETERIZATION WITH CC[MS-DRG]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 218 — CARDIAC VALVE AND OTHER MAJOR CARDIOTHORACIC PROCEDURES WITH CARDIAC CATHETERIZATION WITHOUT CC/MCC[MS-DRG]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 233 — CORONARY BYPASS WITH CARDIAC CATHETERIZATION OR OPEN ABLATION WITH MCC[MS-DRG]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 234 — CORONARY BYPASS WITH CARDIAC CATHETERIZATION OR OPEN ABLATION WITHOUT MCC[MS-DRG]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 275 — CARDIAC DEFIBRILLATOR IMPLANT WITH CARDIAC CATHETERIZATION AND MCC[MS-DRG]: “CARDIAC DEFIBRILLATOR IMPLANT WITH CARDIAC CATHETERIZATION AND MCC — Cardiac Defibrillator Implant with Cardiac Catheterization (MDC 05)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• DRG 276 — CARDIAC DEFIBRILLATOR IMPLANT WITH MCC OR CAROTID SINUS NEUROSTIMULATOR[MS-DRG]: “CARDIAC DEFIBRILLATOR IMPLANT WITH MCC OR CAROTID SINUS NEUROSTIMULATOR — Cardiac Defibrillator Implant (MDC 05)”— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• and 3 more

Clinical classification (CCSR)

• MAM005 — Measurement during cardiac catheterization[CCSR category]: “Measurement during cardiac catheterization — Measurement and Monitoring”— AHRQ CCSR for ICD-10-PCS Procedures (HCUP) · v2026.1

MDC crossing · diagnoses (1844)

• MDC 05 — Diseases and Disorders of the Circulatory System[MDC crossing]: “Diseases and Disorders of the Circulatory System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2026
• A36.81 — Diphtheritic cardiomyopathy[Same-MDC diagnosis]: “Diphtheritic cardiomyopathy — grouped in MDC 05, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A39.50 — Meningococcal carditis, unspecified[Same-MDC diagnosis]: “Meningococcal carditis, unspecified — grouped in MDC 05, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A39.51 — Meningococcal endocarditis[Same-MDC diagnosis]: “Meningococcal endocarditis — grouped in MDC 05, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A39.52 — Meningococcal myocarditis[Same-MDC diagnosis]: “Meningococcal myocarditis — grouped in MDC 05, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• A39.53 — Meningococcal pericarditis[Same-MDC diagnosis]: “Meningococcal pericarditis — grouped in MDC 05, the diagnosis side of this code's crossing.”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• and 1839 more

Nearest codes

• 4A020N7 — Measurement of Cardiac Sampling and Pressure, Left Heart, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 4A020N8 — Measurement of Cardiac Sampling and Pressure, Bilateral, Open Approach[One axis away]— CMS ICD-10-PCS tables
• 4A023N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Percutaneous Approach[One axis away]— CMS ICD-10-PCS tables
• 4A027N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening[One axis away]— CMS ICD-10-PCS tables
• 4A028N6 — Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening Endoscopic[One axis away]— CMS ICD-10-PCS tables