021K4ZQ

Potential MS-DRG Relationships (FY2026)

The MS-DRG grouper treats this as an operating room procedure. It appears in the surgical logic of 2 MS-DRGs:

• MDC 05 — Other Cardiothoracic Procedures: DRG 228, DRG 229

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

Related Codes

Same operation — other Body Part

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

02164ZQ — Bypass Right Atrium to Right Pulmonary Artery, Percutaneous Endoscopic Approach, 02174ZQ — Bypass Left Atrium to Right Pulmonary Artery, Percutaneous Endoscopic Approach, 021L4ZQ — Bypass Left Ventricle to Right Pulmonary Artery, Percutaneous Endoscopic Approach, 021V4ZQ — Bypass Superior Vena Cava to Right Pulmonary Artery, Percutaneous Endoscopic Approach, 021W4ZQ — Bypass Thoracic Aorta, Descending to Right Pulmonary Artery, Percutaneous Endoscopic Approach, 021X4ZQ — Bypass Thoracic Aorta, Ascending/Arch to Right Pulmonary Artery, Percutaneous Endoscopic Approach

Same operation — other Approach

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

021K0ZQ — Bypass Right Ventricle to Right Pulmonary Artery, Open Approach

Same operation — other Device

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

021K48Q — Bypass Right Ventricle to Right Pulmonary Artery with Zooplastic Tissue, Percutaneous Endoscopic Approach, 021K49Q — Bypass Right Ventricle to Right Pulmonary Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach, 021K4AQ — Bypass Right Ventricle to Right Pulmonary Artery with Autologous Arterial Tissue, Percutaneous Endoscopic Approach, 021K4JQ — Bypass Right Ventricle to Right Pulmonary Artery with Synthetic Substitute, Percutaneous Endoscopic Approach, 021K4KQ — Bypass Right Ventricle to Right Pulmonary Artery with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach

Same operation — other Qualifier

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

021K4Z5 — Bypass Right Ventricle to Coronary Circulation, Percutaneous Endoscopic Approach, 021K4Z8 — Bypass Right Ventricle to Right Internal Mammary, Percutaneous Endoscopic Approach, 021K4Z9 — Bypass Right Ventricle to Left Internal Mammary, Percutaneous Endoscopic Approach, 021K4ZC — Bypass Right Ventricle to Thoracic Artery, Percutaneous Endoscopic Approach, 021K4ZF — Bypass Right Ventricle to Abdominal Artery, Percutaneous Endoscopic Approach, 021K4ZP — Bypass Right Ventricle to Pulmonary Trunk, Percutaneous Endoscopic Approach, 021K4ZR — Bypass Right Ventricle to Left Pulmonary Artery, Percutaneous Endoscopic Approach, 021K4ZW — Bypass Right Ventricle to Aorta, Percutaneous Endoscopic Approach

Contextual Map

Every relationship of 021K4ZQ 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.

PCS table

• 021[PCS table]
• [object Object] — Section: [object Object] [Section]: “[object Object]”
• [object Object] — Body System: [object Object] [Body System]: “[object Object]”
• [object Object] — Operation: [object Object] [Operation]: “[object Object]”

MS-DRG participation

• DRG 228 — OTHER CARDIOTHORACIC PROCEDURES WITH MCC [MS-DRG]: “OTHER CARDIOTHORACIC PROCEDURES WITH MCC — Other Cardiothoracic Procedures (MDC 05)”
• DRG 229 — OTHER CARDIOTHORACIC PROCEDURES WITHOUT MCC [MS-DRG]: “OTHER CARDIOTHORACIC PROCEDURES WITHOUT MCC — Other Cardiothoracic Procedures (MDC 05)”

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.”
• A36.81 — Diphtheritic cardiomyopathy [Same-MDC diagnosis]: “Diphtheritic cardiomyopathy — grouped in MDC 05, the diagnosis side of this code's crossing.” · check together
• A39.50 — Meningococcal carditis, unspecified [Same-MDC diagnosis]: “Meningococcal carditis, unspecified — grouped in MDC 05, the diagnosis side of this code's crossing.” · check together
• A39.51 — Meningococcal endocarditis [Same-MDC diagnosis]: “Meningococcal endocarditis — grouped in MDC 05, the diagnosis side of this code's crossing.” · check together
• A39.52 — Meningococcal myocarditis [Same-MDC diagnosis]: “Meningococcal myocarditis — grouped in MDC 05, the diagnosis side of this code's crossing.” · check together
• A39.53 — Meningococcal pericarditis [Same-MDC diagnosis]: “Meningococcal pericarditis — grouped in MDC 05, the diagnosis side of this code's crossing.” · check together
• and 1839 more

Nearest codes

• 02164ZQ — Bypass Right Atrium to Right Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
• 02174ZQ — Bypass Left Atrium to Right Pulmonary Artery, Percutaneous Endoscopic Approach [One axis away]
• 021K0ZQ — Bypass Right Ventricle to Right Pulmonary Artery, Open Approach [One axis away]
• 021K48Q — Bypass Right Ventricle to Right Pulmonary Artery with Zooplastic Tissue, Percutaneous Endoscopic Approach [One axis away]
• 021K49Q — Bypass Right Ventricle to Right Pulmonary Artery with Autologous Venous Tissue, Percutaneous Endoscopic Approach [One axis away]
• 021K4AQ — Bypass Right Ventricle to Right Pulmonary Artery with Autologous Arterial Tissue, Percutaneous Endoscopic Approach [One axis away]
• 021K4JQ — Bypass Right Ventricle to Right Pulmonary Artery with Synthetic Substitute, Percutaneous Endoscopic Approach [One axis away]
• 021K4KQ — Bypass Right Ventricle to Right Pulmonary Artery with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach [One axis away]