2022 ICD-10-CM Diagnosis Code A18.31

Tuberculous peritonitis

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A18.31 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM A18.31 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of A18.31 - other international versions of ICD-10 A18.31 may differ.
Applicable To
  • Tuberculous ascites
The following code(s) above A18.31 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A18.31:
  • A00-B99
    2022 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A15-A19
    2022 ICD-10-CM Range A15-A19

    Tuberculosis

    Includes
    • infections due to Mycobacterium tuberculosis and Mycobacterium bovis
    Type 1 Excludes
    • congenital tuberculosis (P37.0)
    • nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-)
    • pneumoconiosis associated with tuberculosis, any type in A15 (J65)
    • positive PPD (R76.11)
    • positive tuberculin skin test without active tuberculosis (R76.11)
    • sequelae of tuberculosis (B90.-)
    • silicotuberculosis (J65)
    Tuberculosis
Approximate Synonyms
  • Tuberculosis (tb) peritonitis
Clinical Information
  • A form of peritonitis seen in patients with tuberculosis, characterized by lesion either as a miliary form or as a pelvic mass on the peritoneal surfaces. Most patients have ascites, abdominal swelling, abdominal pain, and other systemic symptoms such as fever; weight loss; and anemia.
ICD-10-CM A18.31 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 371 Major gastrointestinal disorders and peritoneal infections with mcc
  • 372 Major gastrointestinal disorders and peritoneal infections with cc
  • 373 Major gastrointestinal disorders and peritoneal infections without cc/mcc
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Convert A18.31 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
Code annotations containing back-references to A18.31:
  • Type 1 Excludes: K65
    , K67
    ICD-10-CM Diagnosis Code K65

    Peritonitis

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code Also
    • if applicable diverticular disease of intestine (K57.-)
    Type 1 Excludes
    • acute appendicitis with generalized peritonitis (K35.2-)
    • aseptic peritonitis (T81.6)
    • benign paroxysmal peritonitis (E85.0)
    • chemical peritonitis (T81.6)
    • gonococcal peritonitis (A54.85)
    • neonatal peritonitis (P78.0-P78.1)
    • pelvic peritonitis, female (N73.3-N73.5)
    • periodic familial peritonitis (E85.0)
    • peritonitis due to talc or other foreign substance (T81.6)
    • peritonitis in chlamydia (A74.81)
    • peritonitis in diphtheria (A36.89)
    • peritonitis in syphilis (late) (A52.74)
    • peritonitis in tuberculosis (A18.31)
    • peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
    • peritonitis with or following appendicitis (K35.-)
    • puerperal peritonitis (O85)
    • retroperitoneal infections (K68.-)
    Use Additional
    • code (B95-B97), to identify infectious agent, if known
    ICD-10-CM Diagnosis Code K67

    Disorders of peritoneum in infectious diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • congenital syphilis (A50.0)
    • helminthiasis (B65.0 -B83.9)
    Type 1 Excludes
    • peritonitis in chlamydia (A74.81)
    • peritonitis in diphtheria (A36.89)
    • peritonitis in gonococcal (A54.85)
    • peritonitis in syphilis (late) (A52.74)
    • peritonitis in tuberculosis (A18.31)

Diagnosis Index entries containing back-references to A18.31:
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
    ICD-10-CM Diagnosis Code L02.91

    Cutaneous abscess, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • peritoneum, peritoneal (perforated) (ruptured) K65.1
      ICD-10-CM Diagnosis Code K65.1

      Peritoneal abscess

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      Applicable To
      • Abdominopelvic abscess
      • Abscess (of) omentum
      • Abscess (of) peritoneum
      • Mesenteric abscess
      • Retrocecal abscess
      • Subdiaphragmatic abscess
      • Subhepatic abscess
      • Subphrenic abscess
      • tuberculous A18.31
  • Ascites (abdominal) R18.8
    ICD-10-CM Diagnosis Code R18.8

    Other ascites

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Ascites NOS
    • Peritoneal effusion (chronic)
    • tuberculous A18.31
  • Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) K65.9
    ICD-10-CM Diagnosis Code K65.9

    Peritonitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Bacterial peritonitis NOS
    • fibrocaseous A18.31 (tuberculous)
    • tuberculous A18.31
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) A15.9
    ICD-10-CM Diagnosis Code A15.9

    Respiratory tuberculosis unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • abscess (respiratory) A15.9
      ICD-10-CM Diagnosis Code A15.9

      Respiratory tuberculosis unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      • subdiaphragmatic A18.31
    • ascites A18.31
    • omentum A18.31
    • peritoneum NEC A18.31
    • peritonitis A18.31

ICD-10-CM Codes Adjacent To A18.31
A18.11 Tuberculosis of kidney and ureter
A18.12 Tuberculosis of bladder
A18.13 Tuberculosis of other urinary organs
A18.14 Tuberculosis of prostate
A18.15 Tuberculosis of other male genital organs
A18.16 Tuberculosis of cervix
A18.17 Tuberculous female pelvic inflammatory disease
A18.18 Tuberculosis of other female genital organs
A18.2 Tuberculous peripheral lymphadenopathy
A18.3 Tuberculosis of intestines, peritoneum and mesenteric glands
A18.31 Tuberculous peritonitis
A18.32 Tuberculous enteritis
A18.39 Retroperitoneal tuberculosis
A18.4 Tuberculosis of skin and subcutaneous tissue
A18.5 Tuberculosis of eye
A18.50 …… unspecified
A18.51 Tuberculous episcleritis
A18.52 Tuberculous keratitis
A18.53 Tuberculous chorioretinitis
A18.54 Tuberculous iridocyclitis
A18.59 Other tuberculosis of eye

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.