ICD-10-CM Codes
A00-B99
A15-A19
A18-
2023 ICD-10-CM Diagnosis Code A18.31

2023 ICD-10-CM Diagnosis Code A18.31

Tuberculous peritonitis

2016

2017

2018

2019

2020

2021

2022

2023

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 2023 edition of ICD-10-CM A18.31 became effective on October 1, 2022.
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
2023 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
2023 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 v40.0):

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
2023 (effective 10/1/2022): No change

Code annotations containing back-references to A18.31:

Type 1 Excludes: K65
, K67

ICD-10-CM Diagnosis Code K65
Peritonitis
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
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
- peritoneum, peritoneal (perforated) (ruptured) K65.1
  ICD-10-CM Diagnosis Code K65.1
  Peritoneal abscess
  2016 2017 2018 2019 2020 2021 2022 2023 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
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
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
- abscess (respiratory) A15.9
  ICD-10-CM Diagnosis Code A15.9
  Respiratory tuberculosis unspecified
  2016 2017 2018 2019 2020 2021 2022 2023 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.

2023 ICD-10-CM Diagnosis Code A18.31

Tuberculous peritonitis

Certain infectious and parasitic diseases

Tuberculosis

Peritonitis

Disorders of peritoneum in infectious diseases classified elsewhere

Cutaneous abscess, unspecified

Peritoneal abscess

Other ascites

Peritonitis, unspecified

Respiratory tuberculosis unspecified

Respiratory tuberculosis unspecified