2027 ICD-10-CM Diagnosis Code A18.83Tuberculosis of digestive tract organs, not elsewhere classified
ICD-10-CM Codes›A00–B99›A15-A19›A18
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
A18.83 is a billable ICD-10-CM diagnosis code for tuberculosis of digestive tract organs, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 371 through 373, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 18 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders and Tuberculosis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bacterial cholangitis
- Bacterial esophagitis
- Bacterial hepatitis
- Gingival disease caused by bacteria
- Gingival tuberculosis
- Granulomatous hepatitis
- Infection of digestive system caused by Mycobacterium tuberculosis
- Infective cholangitis
- Mycobacterial gastritis
- Oral tuberculosis
- Orificial tuberculosis
- Tuberculosis of abdomen
- Tuberculosis of digestive system
- Tuberculosis of esophagus
- Tuberculosis of gastrointestinal tract
- Tuberculosis of liver
- Tuberculosis of stomach
- Tuberculosis orificialis of mouth
- Tuberculous infection of bile duct
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to A18.83: its own notes plus those printed at block A15-A19 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- infections due to Mycobacterium tuberculosis and Mycobacterium bovis
- diseases generally recognized as communicable or transmissible
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- tuberculosis of intestine (A18.32)
- 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)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- 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
Add a second code, after this one, to fully describe the condition.
- code, if applicable, for associated cachexia (E88.A)
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name A18.83, its category, or a range that includes it.
Applicable To 1
These notes mention A18.83.
- O98.0 Tuberculosis complicating pregnancy, childbirth and the puerperium
Excludes1 4
These codes carry an Excludes1 note naming A18.83: they are not reported together with it, unless the two conditions are unrelated.
- K23 Disorders of esophagus in diseases classified elsewheretuberculosis (A18.83)
- K77 Liver disorders in diseases classified elsewheretuberculosis with liver disease (A18.83)
- K87 Disorders of gallbladder, biliary tract and pancreas in diseases classified elsewheretuberculosis of gallbladder (A18.83)
- K87 Disorders of gallbladder, biliary tract and pancreas in diseases classified elsewheretuberculosis of pancreas (A18.83)
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Esophagitis (acute) (alkaline) (chemical) (chronic) (infectional) (necrotic) (peptic) (postoperative) (without bleeding) K20.90
tuberculous A18.83
tuberculous A18.83
tuberculous A18.83
Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) A15.9
buccal cavity A18.83
esophagus A18.83
gallbladder A18.83
gastritis A18.83
gum A18.83
hepatitis A18.83
linguae A18.83
lip A18.83
liver A18.83
mouth A18.83
palate (soft) A18.83
pancreas A18.83
parotid gland or region A18.83
salivary gland A18.83
soft palate A18.83
stomach A18.83
subdeltoid bursa A18.83
submaxillary (region) A18.83
tongue A18.83
uvula A18.83
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Digestive Diseases
When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A18.83 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A18.83Overview
What is the ICD-10 code for tuberculosis of digestive tract organs, not elsewhere classified?
The ICD-10-CM code for tuberculosis of digestive tract organs, not elsewhere classified is A18.83 (sometimes written as A1883). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is A18.83 (Tuberculosis of other specified organs) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report tuberculosis of digestive tract organs, not elsewhere classified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does A18.83 group to?
When tuberculosis of digestive tract organs, not elsewhere classified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 372, 974, 976, 975, 371, 373, with relative weights from 0.6945 to 3.0488 depending on complications. Higher weights mean higher Medicare reimbursement.
Is A18.83 a CC or MCC?
CMS lists A18.83 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 18 closely related codes in its exclusion list.
Can A18.83 be reported with A18.32?
Not as a rule. The Excludes1 note on A18.83 lists "tuberculosis of intestine (A18.32)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
