2026 ICD-10-CM Diagnosis Code A18.32Tuberculous enteritis
ICD-10-CM Codes›A00–B99›A15-A19›A18
- Billable — Valid for Submission
- Not Chronic
A18.32 is a billable ICD-10-CM diagnosis code for tuberculous enteritis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal infection and Tuberculosis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Anal verge finding
- Bacterial duodenitis
- Granulomatous peritonitis
- Infective proctitis
- Intestinal obstruction due to tuberculosis
- Mycobacterial colitis
- Mycobacterial duodenitis
- Mycobacterial enteritis of small intestine
- Orificial tuberculosis
- Serositis
- Tuberculosis of anal canal
- Tuberculosis of anus
- Tuberculosis of colon
- Tuberculosis of intestine
- Tuberculosis of intestines, peritoneum and mesenteric glands
- Tuberculosis of large intestine
- Tuberculosis of rectum
- Tuberculosis of small intestine
- Tuberculosis orificialis of anus
- Tuberculous duodenitis
- Tuberculous enterocolitis
- Tuberculous ileitis
- Tuberculous peritonitis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Tuberculosis of anus and rectum
- Tuberculosis of intestine (large) (small)
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Appendicitis (pneumococcal) (retrocecal) - K37
- tuberculous - A18.32
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) - See Also: Enteritis; - K52.9
- tuberculous (ulcerative) - A18.32
- anus, anal (recurrent) (infectional) - K60.30
- tuberculous - A18.32
- gastrocolic - K31.6
- tuberculous - A18.32
- tuberculous - A18.32
- perirectal - K60.40
- tuberculous - A18.32
- tuberculous - A18.32
- tuberculous - A18.32
- Stricture - See Also: Stenosis;
- tuberculous - A18.32
- Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) - A15.9
- abscess (respiratory) - A15.9
- intestine - A18.32
- ischiorectal - A18.32
- perianal (fistula) - A18.32
- perirectal - A18.32
- rectum - A18.32
- alimentary canal - A18.32
- anus - A18.32
- appendicitis, appendix - A18.32
- bowel (miliary) - A18.32
- cecum - A18.32
- colitis - A18.32
- colon - A18.32
- diarrhea - A18.32
- digestive tract - A18.32
- duodenum - A18.32
- dysentery - A18.32
- enteric, enterica, enteritis - A18.32
- enterocolitis - A18.32
- gastrocolic fistula - A18.32
- gastroenteritis - A18.32
- gastrointestinal tract - A18.32
- ileocecal (hyperplastic) - A18.32
- ileocolitis - A18.32
- ileum - A18.32
- intestine (any part) - A18.32
- ischiorectal - A18.32
- jejunum - A18.32
- perirectal fistula - A18.32
- proctitis - A18.32
- rectum (fistula) (with abscess) - A18.32
- sigmoid - A18.32
- small intestine - A18.32
- ulcer (skin) (primary) - A18.4
- bowel or intestine - A18.32
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Appendicitis(pneumococcal) (retrocecal)
- tuberculous
- Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
- tuberculous (ulcerative)
- Diarrhea, diarrheal(disease) (infantile) (inflammatory)
- tuberculous
- Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
- tuberculous
- Fistula(cutaneous)
- anus, anal (recurrent) (infectional)
- tuberculous
- Fistula(cutaneous)
- gastrocolic
- tuberculous
- Fistula(cutaneous)
- in ano
- tuberculous
- Fistula(cutaneous)
- perirectal
- tuberculous
- Fistula(cutaneous)
- rectum (to skin)
- tuberculous
- Proctitis
- tuberculous
- Stricture
- rectum (sphincter)
- tuberculous
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- intestine
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- ischiorectal
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- perianal (fistula)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- perirectal
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- rectum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- alimentary canal
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- anus
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- appendicitis, appendix
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- bowel (miliary)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- cecum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- colitis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- colon
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- diarrhea
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- digestive tract
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- duodenum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- dysentery
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- enteric, enterica, enteritis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- enterocolitis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- gastrocolic fistula
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- gastroenteritis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- gastrointestinal tract
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ileocecal (hyperplastic)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ileocolitis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ileum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- intestine (any part)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ischiorectal
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- jejunum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- perirectal fistula
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- proctitis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- rectum (fistula) (with abscess)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- sigmoid
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- small intestine
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ulcer (skin) (primary)
- bowel or intestine
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- tuberculous
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Serositis
inflammation of a serous membrane.
Patient EducationClinical
Gastroenteritis
Gastroenteritis is an inflammation of the lining of the stomach and intestines. The main symptoms include vomiting and diarrhea. It is usually not serious in healthy people, but it can sometimes lead to dehydration or cause severe symptoms.
The full article covers:
- What is gastroenteritis?
- What causes gastroenteritis?
- What are the symptoms of gastroenteritis?
- How is gastroenteritis diagnosed?
- What are the treatments for gastroenteritis?
- Can gastroenteritis be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A18.32 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A18.32Overview
Is A18.32 (Tuberculosis of intestines, peritoneum and mesenteric glands) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report tuberculous enteritis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does A18.32 group to?
When tuberculous enteritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, 974, 975, 976, with relative weights from 0.7274 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of A18.32?
Under the General Equivalence Mappings, tuberculous enteritis converts to ICD-9-CM 014.80 (intestinal TB NEC-unspec). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
