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  3. Diagnosis Codes in MS-DRG 373 - Major Gastrointestinal Disorders And Peritoneal Infections Without CC/MCC

Diagnosis Codes in MS-DRG 373 - Major Gastrointestinal Disorders And Peritoneal Infections Without CC/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 diagnosis codes included in MS-DRG V42.0: Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 373

MS-DRG Title: Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC

MCD: 06

Relative Weight: 0.7253 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: 0.73 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: 2.80 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.

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    • K67 - Disorders of peritoneum in infectious diseases classified elsewhere

  • A00 - Cholera

    • A00.0 - Cholera due to Vibrio cholerae 01, biovar cholerae

    • A00.1 - Cholera due to Vibrio cholerae 01, biovar eltor

    • A00.9 - Cholera, unspecified

  • A02 - Other salmonella infections

    • A02.0 - Salmonella enteritis

  • A03 - Shigellosis

    • A03.0 - Shigellosis due to Shigella dysenteriae

    • A03.1 - Shigellosis due to Shigella flexneri

    • A03.2 - Shigellosis due to Shigella boydii

    • A03.3 - Shigellosis due to Shigella sonnei

    • A03.8 - Other shigellosis

    • A03.9 - Shigellosis, unspecified

  • A04 - Other bacterial intestinal infections

    • A04.0 - Enteropathogenic Escherichia coli infection

    • A04.1 - Enterotoxigenic Escherichia coli infection

    • A04.2 - Enteroinvasive Escherichia coli infection

    • A04.3 - Enterohemorrhagic Escherichia coli infection

    • A04.4 - Other intestinal Escherichia coli infections

    • A04.5 - Campylobacter enteritis

    • A04.6 - Enteritis due to Yersinia enterocolitica

    • A04.8 - Other specified bacterial intestinal infections

    • A04.9 - Bacterial intestinal infection, unspecified

  • A04.7 - Enterocolitis due to Clostridium difficile

    • A04.71 - Enterocolitis due to Clostridium difficile, recurrent

    • A04.72 - Enterocolitis due to Clostridium difficile, not specified as recurrent

  • A05 - Other bacterial foodborne intoxications, not elsewhere classified

    • A05.0 - Foodborne staphylococcal intoxication

    • A05.2 - Foodborne Clostridium perfringens [Clostridium welchii] intoxication

    • A05.3 - Foodborne Vibrio parahaemolyticus intoxication

    • A05.4 - Foodborne Bacillus cereus intoxication

    • A05.5 - Foodborne Vibrio vulnificus intoxication

    • A05.8 - Other specified bacterial foodborne intoxications

  • A06 - Amebiasis

    • A06.0 - Acute amebic dysentery

    • A06.1 - Chronic intestinal amebiasis

    • A06.2 - Amebic nondysenteric colitis

  • A07 - Other protozoal intestinal diseases

    • A07.0 - Balantidiasis

    • A07.1 - Giardiasis [lambliasis]

    • A07.2 - Cryptosporidiosis

    • A07.3 - Isosporiasis

    • A07.4 - Cyclosporiasis

    • A07.8 - Other specified protozoal intestinal diseases

    • A07.9 - Protozoal intestinal disease, unspecified

  • A18.3 - Tuberculosis of intestines, peritoneum and mesenteric glands

    • A18.31 - Tuberculous peritonitis

    • A18.32 - Tuberculous enteritis

    • A18.39 - Retroperitoneal tuberculosis

  • A18.8 - Tuberculosis of other specified organs

    • A18.83 - Tuberculosis of digestive tract organs, not elsewhere classified

  • A21 - Tularemia

    • A21.3 - Gastrointestinal tularemia

  • A22 - Anthrax

    • A22.2 - Gastrointestinal anthrax

  • A42 - Actinomycosis

    • A42.1 - Abdominal actinomycosis

  • A54.8 - Other gonococcal infections

    • A54.85 - Gonococcal peritonitis

  • B69 - Cysticercosis

    • B69.0 - Cysticercosis of central nervous system

    • B69.1 - Cysticercosis of eye

    • B69.9 - Cysticercosis, unspecified

  • B69.8 - Cysticercosis of other sites

    • B69.81 - Myositis in cysticercosis

    • B69.89 - Cysticercosis of other sites

  • B70 - Diphyllobothriasis and sparganosis

  • B71 - Other cestode infections

    • B71.0 - Hymenolepiasis

    • B71.1 - Dipylidiasis

    • B71.8 - Other specified cestode infections

    • B71.9 - Cestode infection, unspecified

  • B76 - Hookworm diseases

    • B76.0 - Ancylostomiasis

    • B76.1 - Necatoriasis

    • B76.8 - Other hookworm diseases

    • B76.9 - Hookworm disease, unspecified

  • K35.20 - Acute appendicitis with generalized peritonitis, without abscess

    • K35.200 - Acute appendicitis with generalized peritonitis, without perforation or abscess

    • K35.201 - Acute appendicitis with generalized peritonitis, with perforation, without abscess

    • K35.209 - Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation

  • K35.21 - Acute appendicitis with generalized peritonitis, with abscess

    • K35.210 - Acute appendicitis with generalized peritonitis, without perforation, with abscess

    • K35.211 - Acute appendicitis with generalized peritonitis, with perforation and abscess

    • K35.219 - Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforation

  • K35.3 - Acute appendicitis with localized peritonitis

    • K35.30 - Acute appendicitis with localized peritonitis, without perforation or gangrene

    • K35.31 - Acute appendicitis with localized peritonitis and gangrene, without perforation

    • K35.32 - Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess

    • K35.33 - Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess

  • K35.89 - Other acute appendicitis

    • K35.890 - Other acute appendicitis without perforation or gangrene

    • K35.891 - Other acute appendicitis without perforation, with gangrene

  • K63 - Other diseases of intestine

    • K63.0 - Abscess of intestine

  • K65 - Peritonitis

    • K65.0 - Generalized (acute) peritonitis

    • K65.1 - Peritoneal abscess

    • K65.2 - Spontaneous bacterial peritonitis

    • K65.8 - Other peritonitis

    • K65.9 - Peritonitis, unspecified

  • K68 - Disorders of retroperitoneum

    • K68.2 - Retroperitoneal fibrosis

    • K68.3 - Retroperitoneal hematoma

    • K68.9 - Other disorders of retroperitoneum

  • K68.1 - Retroperitoneal abscess

    • K68.12 - Psoas muscle abscess

    • K68.19 - Other retroperitoneal abscess