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  3. Procedure Codes in MS-DRG 277 - Cardiac Defibrillator Implant Without MCC

Procedure Codes in MS-DRG 277 - Cardiac Defibrillator Implant Without MCC

The Medicare Severity Diagnosis-Related Group (MS-DRG) is a patient classification system used to categorize hospital cases based on clinical similarity and expected resource use. MS-DRGs organize all possible principal diagnoses into mutually exclusive groups known as Major Diagnostic Categories (MDCs), which help determine reimbursement under the Medicare Inpatient Prospective Payment System.

This section lists the procedure codes included in MS-DRG V43.0: Cardiac Defibrillator Implant without MCC from October 1, 2025, through September 30, 2026.

MS-DRG: 277

MS-DRG Title: Cardiac Defibrillator Implant without MCC

MCD: 05

Relative Weight: 4.6185 Relative Weight
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Geometric LOS: 4.62 Geometric Length of Stay
The geometric mean length of stay (GMLOS) is used by Medicare to calculate the reimbursement for patients whose medical treatment takes a much longer or shorter time than average.

Arithmetic LOS: 3.30 Arithmetic Length of Stay
The average length of stay (ALOS) reflects the average number of days a patient spends in a hospital for each admission.

  • 4A0 - Measurement and Monitoring, Physiological Systems, Measurement

    • 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

  • B20 - Imaging, Heart, Plain Radiography

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

  • B21 - Imaging, Heart, Fluoroscopy

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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