MS-DRG · FY 2026 v43.0

MS-DRG 277 – Cardiac Defibrillator Implant without MCC

A Surgical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Inpatient cases group to DRG 277 when one of the 122 ICD-10-PCS operating-room procedures listed below is reported. Its FY 2026 relative weight is 4.6185 with a geometric mean length of stay of 3.3 days.

Surgical DRG – assigned by operating-room procedure✓ Official CMS v43.0 dataset
4.6185
Relative Weight
3.3
Geometric Mean LOS (days)
4.1
Arithmetic Mean LOS (days)
122
Procedure Codes
How a case is assigned to DRG 277

The grouper first assigns the case to MDC 05 from the principal diagnosis, then matches a qualifying operating-room procedure from the ICD-10-PCS list below (this is a Surgical DRG).

ICD-10-PCS

Procedure Codes 122 codes · 30 categories

122 of 122 shown
02H4 Heart and Great Vessels, Insertion5 codes
  • 02H40KZ Insertion of Defibrillator Lead into Coronary Vein, Open Approach
  • 02H43JZ Insertion of Pacemaker Lead into Coronary Vein, Percutaneous Approach
  • 02H43KZ Insertion of Defibrillator Lead into Coronary Vein, Percutaneous Approach
  • 02H43MZ Insertion of Cardiac Lead into Coronary Vein, Percutaneous Approach
  • 02H44KZ Insertion of Defibrillator Lead into Coronary Vein, Percutaneous Endoscopic Approach
02H6 Heart and Great Vessels, Insertion6 codes
  • 02H60KZ Insertion of Defibrillator Lead into Right Atrium, Open Approach
  • 02H60MZ Insertion of Cardiac Lead into Right Atrium, Open Approach
  • 02H63KZ Insertion of Defibrillator Lead into Right Atrium, Percutaneous Approach
  • 02H63MZ Insertion of Cardiac Lead into Right Atrium, Percutaneous Approach
  • 02H64KZ Insertion of Defibrillator Lead into Right Atrium, Percutaneous Endoscopic Approach
  • 02H64MZ Insertion of Cardiac Lead into Right Atrium, Percutaneous Endoscopic Approach
02H7 Heart and Great Vessels, Insertion3 codes
  • 02H70KZ Insertion of Defibrillator Lead into Left Atrium, Open Approach
  • 02H73KZ Insertion of Defibrillator Lead into Left Atrium, Percutaneous Approach
  • 02H74KZ Insertion of Defibrillator Lead into Left Atrium, Percutaneous Endoscopic Approach
02HK Heart and Great Vessels, Insertion6 codes
  • 02HK0KZ Insertion of Defibrillator Lead into Right Ventricle, Open Approach
  • 02HK0MZ Insertion of Cardiac Lead into Right Ventricle, Open Approach
  • 02HK3KZ Insertion of Defibrillator Lead into Right Ventricle, Percutaneous Approach
  • 02HK3MZ Insertion of Cardiac Lead into Right Ventricle, Percutaneous Approach
  • 02HK4KZ Insertion of Defibrillator Lead into Right Ventricle, Percutaneous Endoscopic Approach
  • 02HK4MZ Insertion of Cardiac Lead into Right Ventricle, Percutaneous Endoscopic Approach
02HL Heart and Great Vessels, Insertion3 codes
  • 02HL0KZ Insertion of Defibrillator Lead into Left Ventricle, Open Approach
  • 02HL3KZ Insertion of Defibrillator Lead into Left Ventricle, Percutaneous Approach
  • 02HL4KZ Insertion of Defibrillator Lead into Left Ventricle, Percutaneous Endoscopic Approach
02HN Heart and Great Vessels, Insertion9 codes
  • 02HN0JZ Insertion of Pacemaker Lead into Pericardium, Open Approach
  • 02HN0KZ Insertion of Defibrillator Lead into Pericardium, Open Approach
  • 02HN0MZ Insertion of Cardiac Lead into Pericardium, Open Approach
  • 02HN3JZ Insertion of Pacemaker Lead into Pericardium, Percutaneous Approach
  • 02HN3KZ Insertion of Defibrillator Lead into Pericardium, Percutaneous Approach
  • 02HN3MZ Insertion of Cardiac Lead into Pericardium, Percutaneous Approach
  • 02HN4JZ Insertion of Pacemaker Lead into Pericardium, Percutaneous Endoscopic Approach
  • 02HN4KZ Insertion of Defibrillator Lead into Pericardium, Percutaneous Endoscopic Approach
  • 02HN4MZ Insertion of Cardiac Lead into Pericardium, Percutaneous Endoscopic Approach
0JH6 Subcutaneous Tissue and Fascia, Insertion9 codes
  • 0JH608Z Insertion of Defibrillator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
  • 0JH609Z Insertion of Cardiac Resynchronization Defibrillator Pulse Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
  • 0JH60AZ Insertion of Contractility Modulation Device into Chest Subcutaneous Tissue and Fascia, Open Approach
  • 0JH60FZ Insertion of Subcutaneous Defibrillator Lead into Chest Subcutaneous Tissue and Fascia, Open Approach
  • 0JH60MZ Insertion of Stimulator Generator into Chest Subcutaneous Tissue and Fascia, Open Approach
  • 0JH638Z Insertion of Defibrillator Generator into Chest Subcutaneous Tissue and Fascia, Percutaneous Approach
  • 0JH639Z Insertion of Cardiac Resynchronization Defibrillator Pulse Generator into Chest Subcutaneous Tissue and Fascia, Percutaneous Approach
  • 0JH63AZ Insertion of Contractility Modulation Device into Chest Subcutaneous Tissue and Fascia, Percutaneous Approach
  • 0JH63FZ Insertion of Subcutaneous Defibrillator Lead into Chest Subcutaneous Tissue and Fascia, Percutaneous Approach
0JH8 Subcutaneous Tissue and Fascia, Insertion6 codes
  • 0JH808Z Insertion of Defibrillator Generator into Abdomen Subcutaneous Tissue and Fascia, Open Approach
  • 0JH809Z Insertion of Cardiac Resynchronization Defibrillator Pulse Generator into Abdomen Subcutaneous Tissue and Fascia, Open Approach
  • 0JH80AZ Insertion of Contractility Modulation Device into Abdomen Subcutaneous Tissue and Fascia, Open Approach
  • 0JH838Z Insertion of Defibrillator Generator into Abdomen Subcutaneous Tissue and Fascia, Percutaneous Approach
  • 0JH839Z Insertion of Cardiac Resynchronization Defibrillator Pulse Generator into Abdomen Subcutaneous Tissue and Fascia, Percutaneous Approach
  • 0JH83AZ Insertion of Contractility Modulation Device into Abdomen Subcutaneous Tissue and Fascia, Percutaneous Approach
0WHC Anatomical Regions, General, Insertion3 codes
  • 0WHC0GZ Insertion of Defibrillator Lead into Mediastinum, Open Approach
  • 0WHC3GZ Insertion of Defibrillator Lead into Mediastinum, Percutaneous Approach
  • 0WHC4GZ Insertion of Defibrillator Lead into Mediastinum, Percutaneous Endoscopic Approach
4A02 Measurement and Monitoring, Physiological Systems, Measurement12 codes
  • 4A020N6 Measurement of Cardiac Sampling and Pressure, Right Heart, Open Approach
  • 4A020N7 Measurement of Cardiac Sampling and Pressure, Left Heart, Open Approach
  • 4A020N8 Measurement of Cardiac Sampling and Pressure, Bilateral, Open Approach
  • 4A023N6 Measurement of Cardiac Sampling and Pressure, Right Heart, Percutaneous Approach
  • 4A023N7 Measurement of Cardiac Sampling and Pressure, Left Heart, Percutaneous Approach
  • 4A023N8 Measurement of Cardiac Sampling and Pressure, Bilateral, Percutaneous Approach
  • 4A027N6 Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening
  • 4A027N7 Measurement of Cardiac Sampling and Pressure, Left Heart, Via Natural or Artificial Opening
  • 4A027N8 Measurement of Cardiac Sampling and Pressure, Bilateral, Via Natural or Artificial Opening
  • 4A028N6 Measurement of Cardiac Sampling and Pressure, Right Heart, Via Natural or Artificial Opening Endoscopic
  • 4A028N7 Measurement of Cardiac Sampling and Pressure, Left Heart, Via Natural or Artificial Opening Endoscopic
  • 4A028N8 Measurement of Cardiac Sampling and Pressure, Bilateral, Via Natural or Artificial Opening Endoscopic
B200 Imaging, Heart, Plain Radiography3 codes
  • B2000ZZ Plain Radiography of Single Coronary Artery using High Osmolar Contrast
  • B2001ZZ Plain Radiography of Single Coronary Artery using Low Osmolar Contrast
  • B200YZZ Plain Radiography of Single Coronary Artery using Other Contrast
B201 Imaging, Heart, Plain Radiography3 codes
  • B2010ZZ Plain Radiography of Multiple Coronary Arteries using High Osmolar Contrast
  • B2011ZZ Plain Radiography of Multiple Coronary Arteries using Low Osmolar Contrast
  • B201YZZ Plain Radiography of Multiple Coronary Arteries using Other Contrast
B202 Imaging, Heart, Plain Radiography3 codes
  • B2020ZZ Plain Radiography of Single Coronary Artery Bypass Graft using High Osmolar Contrast
  • B2021ZZ Plain Radiography of Single Coronary Artery Bypass Graft using Low Osmolar Contrast
  • B202YZZ Plain Radiography of Single Coronary Artery Bypass Graft using Other Contrast
B203 Imaging, Heart, Plain Radiography3 codes
  • B2030ZZ Plain Radiography of Multiple Coronary Artery Bypass Grafts using High Osmolar Contrast
  • B2031ZZ Plain Radiography of Multiple Coronary Artery Bypass Grafts using Low Osmolar Contrast
  • B203YZZ Plain Radiography of Multiple Coronary Artery Bypass Grafts using Other Contrast
B204 Imaging, Heart, Plain Radiography3 codes
  • B2040ZZ Plain Radiography of Right Heart using High Osmolar Contrast
  • B2041ZZ Plain Radiography of Right Heart using Low Osmolar Contrast
  • B204YZZ Plain Radiography of Right Heart using Other Contrast
B205 Imaging, Heart, Plain Radiography3 codes
  • B2050ZZ Plain Radiography of Left Heart using High Osmolar Contrast
  • B2051ZZ Plain Radiography of Left Heart using Low Osmolar Contrast
  • B205YZZ Plain Radiography of Left Heart using Other Contrast
B206 Imaging, Heart, Plain Radiography3 codes
  • B2060ZZ Plain Radiography of Right and Left Heart using High Osmolar Contrast
  • B2061ZZ Plain Radiography of Right and Left Heart using Low Osmolar Contrast
  • B206YZZ Plain Radiography of Right and Left Heart using Other Contrast
B207 Imaging, Heart, Plain Radiography3 codes
  • B2070ZZ Plain Radiography of Right Internal Mammary Bypass Graft using High Osmolar Contrast
  • B2071ZZ Plain Radiography of Right Internal Mammary Bypass Graft using Low Osmolar Contrast
  • B207YZZ Plain Radiography of Right Internal Mammary Bypass Graft using Other Contrast
B208 Imaging, Heart, Plain Radiography3 codes
  • B2080ZZ Plain Radiography of Left Internal Mammary Bypass Graft using High Osmolar Contrast
  • B2081ZZ Plain Radiography of Left Internal Mammary Bypass Graft using Low Osmolar Contrast
  • B208YZZ Plain Radiography of Left Internal Mammary Bypass Graft using Other Contrast
B20F Imaging, Heart, Plain Radiography3 codes
  • B20F0ZZ Plain Radiography of Other Bypass Graft using High Osmolar Contrast
  • B20F1ZZ Plain Radiography of Other Bypass Graft using Low Osmolar Contrast
  • B20FYZZ Plain Radiography of Other Bypass Graft using Other Contrast
B210 Imaging, Heart, Fluoroscopy3 codes
  • B2100ZZ Fluoroscopy of Single Coronary Artery using High Osmolar Contrast
  • B2101ZZ Fluoroscopy of Single Coronary Artery using Low Osmolar Contrast
  • B210YZZ Fluoroscopy of Single Coronary Artery using Other Contrast
B211 Imaging, Heart, Fluoroscopy3 codes
  • B2110ZZ Fluoroscopy of Multiple Coronary Arteries using High Osmolar Contrast
  • B2111ZZ Fluoroscopy of Multiple Coronary Arteries using Low Osmolar Contrast
  • B211YZZ Fluoroscopy of Multiple Coronary Arteries using Other Contrast
B212 Imaging, Heart, Fluoroscopy3 codes
  • B2120ZZ Fluoroscopy of Single Coronary Artery Bypass Graft using High Osmolar Contrast
  • B2121ZZ Fluoroscopy of Single Coronary Artery Bypass Graft using Low Osmolar Contrast
  • B212YZZ Fluoroscopy of Single Coronary Artery Bypass Graft using Other Contrast
B213 Imaging, Heart, Fluoroscopy3 codes
  • B2130ZZ Fluoroscopy of Multiple Coronary Artery Bypass Grafts using High Osmolar Contrast
  • B2131ZZ Fluoroscopy of Multiple Coronary Artery Bypass Grafts using Low Osmolar Contrast
  • B213YZZ Fluoroscopy of Multiple Coronary Artery Bypass Grafts using Other Contrast
B214 Imaging, Heart, Fluoroscopy3 codes
  • B2140ZZ Fluoroscopy of Right Heart using High Osmolar Contrast
  • B2141ZZ Fluoroscopy of Right Heart using Low Osmolar Contrast
  • B214YZZ Fluoroscopy of Right Heart using Other Contrast
B215 Imaging, Heart, Fluoroscopy3 codes
  • B2150ZZ Fluoroscopy of Left Heart using High Osmolar Contrast
  • B2151ZZ Fluoroscopy of Left Heart using Low Osmolar Contrast
  • B215YZZ Fluoroscopy of Left Heart using Other Contrast
B216 Imaging, Heart, Fluoroscopy3 codes
  • B2160ZZ Fluoroscopy of Right and Left Heart using High Osmolar Contrast
  • B2161ZZ Fluoroscopy of Right and Left Heart using Low Osmolar Contrast
  • B216YZZ Fluoroscopy of Right and Left Heart using Other Contrast
B217 Imaging, Heart, Fluoroscopy3 codes
  • B2170ZZ Fluoroscopy of Right Internal Mammary Bypass Graft using High Osmolar Contrast
  • B2171ZZ Fluoroscopy of Right Internal Mammary Bypass Graft using Low Osmolar Contrast
  • B217YZZ Fluoroscopy of Right Internal Mammary Bypass Graft using Other Contrast
B218 Imaging, Heart, Fluoroscopy3 codes
  • B2180ZZ Fluoroscopy of Left Internal Mammary Bypass Graft using High Osmolar Contrast
  • B2181ZZ Fluoroscopy of Left Internal Mammary Bypass Graft using Low Osmolar Contrast
  • B218YZZ Fluoroscopy of Left Internal Mammary Bypass Graft using Other Contrast
B21F Imaging, Heart, Fluoroscopy3 codes
  • B21F0ZZ Fluoroscopy of Other Bypass Graft using High Osmolar Contrast
  • B21F1ZZ Fluoroscopy of Other Bypass Graft using Low Osmolar Contrast
  • B21FYZZ Fluoroscopy of Other Bypass Graft using Other Contrast
ICD-10-CM

Qualifying Diagnosis Codes

Diagnosis codes do not drive assignment for this DRG. Cases group here from the ICD-10-PCS procedure list below.

Frequently Asked Questions

What is MS-DRG 277?

MS-DRG 277 (Cardiac Defibrillator Implant without MCC) is a surgical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Its FY 2026 relative weight is 4.6185 with a geometric mean length of stay of 3.3 days.

How many procedure codes group to DRG 277?

122 ICD-10-PCS operating-room procedure codes group to this DRG.

What is the relative weight of DRG 277?

The FY 2026 relative weight of this DRG is 4.6185, meaning reimbursement of roughly 4.62 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

← PreviousDRG 276 – Cardiac Defibrillator Implant with MCC or Carotid Sinus
Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.