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  3. Procedure Codes in MS-DRG 421 - Hepatobiliary Diagnostic Procedures With CC

Procedure Codes in MS-DRG 421 - Hepatobiliary Diagnostic Procedures With CC

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 V42.0: Hepatobiliary Diagnostic Procedures with CC from October 1, 2024, through September 30, 2025.

MS-DRG: 421

MS-DRG Title: Hepatobiliary Diagnostic Procedures with CC

MCD: 07

Relative Weight: 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: 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: 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.

  • 07J - Lymphatic and Hemic Systems, Inspection

    • 07JP0ZZ - Inspection of Spleen, Open Approach

  • 0D9 - Gastrointestinal System, Drainage

    • 0D9U0ZX - Drainage of Omentum, Open Approach, Diagnostic

    • 0D9U4ZX - Drainage of Omentum, Percutaneous Endoscopic Approach, Diagnostic

    • 0D9V0ZX - Drainage of Mesentery, Open Approach, Diagnostic

    • 0D9V4ZX - Drainage of Mesentery, Percutaneous Endoscopic Approach, Diagnostic

    • 0D9W0ZX - Drainage of Peritoneum, Open Approach, Diagnostic

    • 0D9W4ZX - Drainage of Peritoneum, Percutaneous Endoscopic Approach, Diagnostic

  • 0DB - Gastrointestinal System, Excision

    • 0DBU0ZX - Excision of Omentum, Open Approach, Diagnostic

    • 0DBV0ZX - Excision of Mesentery, Open Approach, Diagnostic

    • 0DBW0ZX - Excision of Peritoneum, Open Approach, Diagnostic

  • 0DJ - Gastrointestinal System, Inspection

    • 0DJ00ZZ - Inspection of Upper Intestinal Tract, Open Approach

    • 0DJ60ZZ - Inspection of Stomach, Open Approach

    • 0DJ64ZZ - Inspection of Stomach, Percutaneous Endoscopic Approach

    • 0DJD0ZZ - Inspection of Lower Intestinal Tract, Open Approach

    • 0DJU0ZZ - Inspection of Omentum, Open Approach

    • 0DJU4ZZ - Inspection of Omentum, Percutaneous Endoscopic Approach

    • 0DJV0ZZ - Inspection of Mesentery, Open Approach

    • 0DJV4ZZ - Inspection of Mesentery, Percutaneous Endoscopic Approach

    • 0DJW0ZZ - Inspection of Peritoneum, Open Approach

    • 0DJW4ZZ - Inspection of Peritoneum, Percutaneous Endoscopic Approach

  • 0F9 - Hepatobiliary System and Pancreas, Drainage

    • 0F900ZX - Drainage of Liver, Open Approach, Diagnostic

    • 0F910ZX - Drainage of Right Lobe Liver, Open Approach, Diagnostic

    • 0F920ZX - Drainage of Left Lobe Liver, Open Approach, Diagnostic

    • 0F940ZX - Drainage of Gallbladder, Open Approach, Diagnostic

    • 0F944ZX - Drainage of Gallbladder, Percutaneous Endoscopic Approach, Diagnostic

    • 0F950ZX - Drainage of Right Hepatic Duct, Open Approach, Diagnostic

    • 0F960ZX - Drainage of Left Hepatic Duct, Open Approach, Diagnostic

    • 0F970ZX - Drainage of Common Hepatic Duct, Open Approach, Diagnostic

    • 0F980ZX - Drainage of Cystic Duct, Open Approach, Diagnostic

    • 0F990ZX - Drainage of Common Bile Duct, Open Approach, Diagnostic

    • 0F9C0ZX - Drainage of Ampulla of Vater, Open Approach, Diagnostic

    • 0F9D0ZX - Drainage of Pancreatic Duct, Open Approach, Diagnostic

    • 0F9F0ZX - Drainage of Accessory Pancreatic Duct, Open Approach, Diagnostic

    • 0F9G0ZX - Drainage of Pancreas, Open Approach, Diagnostic

  • 0FB - Hepatobiliary System and Pancreas, Excision

    • 0FB00ZX - Excision of Liver, Open Approach, Diagnostic

    • 0FB04ZX - Excision of Liver, Percutaneous Endoscopic Approach, Diagnostic

    • 0FB10ZX - Excision of Right Lobe Liver, Open Approach, Diagnostic

    • 0FB14ZX - Excision of Right Lobe Liver, Percutaneous Endoscopic Approach, Diagnostic

    • 0FB20ZX - Excision of Left Lobe Liver, Open Approach, Diagnostic

    • 0FB24ZX - Excision of Left Lobe Liver, Percutaneous Endoscopic Approach, Diagnostic

    • 0FB40ZX - Excision of Gallbladder, Open Approach, Diagnostic

    • 0FB50ZX - Excision of Right Hepatic Duct, Open Approach, Diagnostic

    • 0FB60ZX - Excision of Left Hepatic Duct, Open Approach, Diagnostic

    • 0FB70ZX - Excision of Common Hepatic Duct, Open Approach, Diagnostic

    • 0FB80ZX - Excision of Cystic Duct, Open Approach, Diagnostic

    • 0FB90ZX - Excision of Common Bile Duct, Open Approach, Diagnostic

    • 0FBC0ZX - Excision of Ampulla of Vater, Open Approach, Diagnostic

    • 0FBD0ZX - Excision of Pancreatic Duct, Open Approach, Diagnostic

    • 0FBF0ZX - Excision of Accessory Pancreatic Duct, Open Approach, Diagnostic

    • 0FBG0ZX - Excision of Pancreas, Open Approach, Diagnostic

  • 0FD - Hepatobiliary System and Pancreas, Extraction

    • 0FD04ZX - Extraction of Liver, Percutaneous Endoscopic Approach, Diagnostic

    • 0FD14ZX - Extraction of Right Lobe Liver, Percutaneous Endoscopic Approach, Diagnostic

    • 0FD24ZX - Extraction of Left Lobe Liver, Percutaneous Endoscopic Approach, Diagnostic

  • 0FJ - Hepatobiliary System and Pancreas, Inspection

    • 0FJ00ZZ - Inspection of Liver, Open Approach

    • 0FJ04ZZ - Inspection of Liver, Percutaneous Endoscopic Approach

    • 0FJ40ZZ - Inspection of Gallbladder, Open Approach

    • 0FJ44ZZ - Inspection of Gallbladder, Percutaneous Endoscopic Approach

    • 0FJD0ZZ - Inspection of Pancreatic Duct, Open Approach

    • 0FJD4ZZ - Inspection of Pancreatic Duct, Percutaneous Endoscopic Approach

    • 0FJG0ZZ - Inspection of Pancreas, Open Approach

    • 0FJG4ZZ - Inspection of Pancreas, Percutaneous Endoscopic Approach

  • 0W9 - Anatomical Regions, General, Drainage

    • 0W9G00Z - Drainage of Peritoneal Cavity with Drainage Device, Open Approach

    • 0W9G0ZX - Drainage of Peritoneal Cavity, Open Approach, Diagnostic

    • 0W9G0ZZ - Drainage of Peritoneal Cavity, Open Approach

    • 0W9G40Z - Drainage of Peritoneal Cavity with Drainage Device, Percutaneous Endoscopic Approach

    • 0W9G4ZX - Drainage of Peritoneal Cavity, Percutaneous Endoscopic Approach, Diagnostic

    • 0W9G4ZZ - Drainage of Peritoneal Cavity, Percutaneous Endoscopic Approach

    • 0W9H0ZX - Drainage of Retroperitoneum, Open Approach, Diagnostic

    • 0W9H3ZX - Drainage of Retroperitoneum, Percutaneous Approach, Diagnostic

    • 0W9H4ZX - Drainage of Retroperitoneum, Percutaneous Endoscopic Approach, Diagnostic

    • 0W9J0ZX - Drainage of Pelvic Cavity, Open Approach, Diagnostic

    • 0W9J4ZX - Drainage of Pelvic Cavity, Percutaneous Endoscopic Approach, Diagnostic

  • 0WB - Anatomical Regions, General, Excision

    • 0WBH0ZX - Excision of Retroperitoneum, Open Approach, Diagnostic

  • 0WC - Anatomical Regions, General, Extirpation

    • 0WCJ0ZZ - Extirpation of Matter from Pelvic Cavity, Open Approach

    • 0WCP0ZZ - Extirpation of Matter from Gastrointestinal Tract, Open Approach

    • 0WCR0ZZ - Extirpation of Matter from Genitourinary Tract, Open Approach

  • 0WJ - Anatomical Regions, General, Inspection

    • 0WJF4ZZ - Inspection of Abdominal Wall, Percutaneous Endoscopic Approach

    • 0WJG0ZZ - Inspection of Peritoneal Cavity, Open Approach

    • 0WJG4ZZ - Inspection of Peritoneal Cavity, Percutaneous Endoscopic Approach

    • 0WJH4ZZ - Inspection of Retroperitoneum, Percutaneous Endoscopic Approach

    • 0WJJ0ZZ - Inspection of Pelvic Cavity, Open Approach

    • 0WJJ4ZZ - Inspection of Pelvic Cavity, Percutaneous Endoscopic Approach

    • 0WJP0ZZ - Inspection of Gastrointestinal Tract, Open Approach

    • 0WJP4ZZ - Inspection of Gastrointestinal Tract, Percutaneous Endoscopic Approach

    • 0WJR0ZZ - Inspection of Genitourinary Tract, Open Approach

    • 0WJR4ZZ - Inspection of Genitourinary Tract, Percutaneous Endoscopic Approach

  • 0Y9 - Anatomical Regions, Lower Extremities, Drainage

    • 0Y950ZX - Drainage of Right Inguinal Region, Open Approach, Diagnostic

    • 0Y953ZX - Drainage of Right Inguinal Region, Percutaneous Approach, Diagnostic

    • 0Y954ZX - Drainage of Right Inguinal Region, Percutaneous Endoscopic Approach, Diagnostic

    • 0Y960ZX - Drainage of Left Inguinal Region, Open Approach, Diagnostic

    • 0Y963ZX - Drainage of Left Inguinal Region, Percutaneous Approach, Diagnostic

    • 0Y964ZX - Drainage of Left Inguinal Region, Percutaneous Endoscopic Approach, Diagnostic

  • 0YB - Anatomical Regions, Lower Extremities, Excision

    • 0YB50ZX - Excision of Right Inguinal Region, Open Approach, Diagnostic

    • 0YB53ZX - Excision of Right Inguinal Region, Percutaneous Approach, Diagnostic

    • 0YB54ZX - Excision of Right Inguinal Region, Percutaneous Endoscopic Approach, Diagnostic

    • 0YB60ZX - Excision of Left Inguinal Region, Open Approach, Diagnostic

    • 0YB63ZX - Excision of Left Inguinal Region, Percutaneous Approach, Diagnostic

    • 0YB64ZX - Excision of Left Inguinal Region, Percutaneous Endoscopic Approach, Diagnostic

    • 0YB70ZX - Excision of Right Femoral Region, Open Approach, Diagnostic

    • 0YB73ZX - Excision of Right Femoral Region, Percutaneous Approach, Diagnostic

    • 0YB74ZX - Excision of Right Femoral Region, Percutaneous Endoscopic Approach, Diagnostic

    • 0YB80ZX - Excision of Left Femoral Region, Open Approach, Diagnostic

    • 0YB83ZX - Excision of Left Femoral Region, Percutaneous Approach, Diagnostic

    • 0YB84ZX - Excision of Left Femoral Region, Percutaneous Endoscopic Approach, Diagnostic

  • 0YJ - Anatomical Regions, Lower Extremities, Inspection

    • 0YJ54ZZ - Inspection of Right Inguinal Region, Percutaneous Endoscopic Approach

    • 0YJ64ZZ - Inspection of Left Inguinal Region, Percutaneous Endoscopic Approach

    • 0YJ74ZZ - Inspection of Right Femoral Region, Percutaneous Endoscopic Approach

    • 0YJ84ZZ - Inspection of Left Femoral Region, Percutaneous Endoscopic Approach

    • 0YJA4ZZ - Inspection of Bilateral Inguinal Region, Percutaneous Endoscopic Approach

    • 0YJE4ZZ - Inspection of Bilateral Femoral Region, Percutaneous Endoscopic Approach

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

    • 4A0C45Z - Measurement of Biliary Flow, Percutaneous Endoscopic Approach

    • 4A0C4BZ - Measurement of Biliary Pressure, Percutaneous Endoscopic Approach