2027 ICD-10-CM Diagnosis Code A18.89Tuberculosis of other sites
ICD-10-CM Codes›A00–B99›A15-A19›A18
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
A18.89 is a billable ICD-10-CM diagnosis code for tuberculosis of other sites. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869, 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 14 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tuberculosis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cerebral arteritis
- Extrapulmonary tuberculosis co-occurrent with human immunodeficiency virus infection
- Granulomatous mastitis
- Infectious disease of placenta
- Maternal tuberculosis during pregnancy, childbirth and/or puerperium
- Orificial tuberculosis
- Placentitis
- Soft tissue infection associated with tuberculosis
- Tuberculoma
- Tuberculosis of breast
- Tuberculosis of placenta
- Tuberculosis, extrapulmonary
- Tuberculous cerebral arteritis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to A18.89: 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
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Tuberculosis of muscle
- Tuberculous cerebral arteritis
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- 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 A18.89, its category, or a range that includes it.
Applicable To 1
These notes mention A18.89.
- O98.0 Tuberculosis complicating pregnancy, childbirth and the puerperium
Excludes1 2
These codes carry an Excludes1 note naming A18.89: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 1
These codes carry an Excludes2 note naming A18.89: its condition is not part of those codes, and both may be reported when the patient has both.
- A31 Infection due to other mycobacteria
Code First 1
These codes say to code first a condition named in the note, and A18.89 is one of the conditions named.
- D63.8 Anemia in other chronic diseases classified elsewheretuberculosis (A18.89)
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) D64.9
tuberculous A18.89
tuberculous A18.89
Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) A15.9
breast A18.89
anemia A18.89
artery, arteritis A18.89
cerebral A18.89
breast A18.89
connective tissue (systemic) A18.89
endarteritis A18.89
mammary gland A18.89
organ, specified NEC A18.89
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Tuberculosis
Tuberculosis (TB) is a bacterial disease that usually attacks the lungs. But it can also attack other parts of the body, including the kidneys, spine, and brain.
The full article covers:
- What is tuberculosis (TB)?
- What causes tuberculosis (TB)?
- Who is more likely to get infected with tuberculosis (TB) germs?
- Who is more likely to develop TB disease?
- What are the symptoms of tuberculosis (TB)?
- How is tuberculosis (TB) diagnosed?
- What is the treatment for tuberculosis (TB)?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A18.89 to ICD-9-CMHistory
Code HistoryHistory
Questions About A18.89Overview
What is the ICD-10 code for tuberculosis of other sites?
The ICD-10-CM code for tuberculosis of other sites is A18.89 (sometimes written as A1889). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is A18.89 (Tuberculosis of other specified organs) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report tuberculosis of other sites on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does A18.89 group to?
When tuberculosis of other sites is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 976, 975, 867, 869, 868, with relative weights from 0.6784 to 3.0488 depending on complications. Higher weights mean higher Medicare reimbursement.
Is A18.89 a CC or MCC?
CMS lists A18.89 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 14 closely related codes in its exclusion list.
Can A18.89 be reported with P37.0?
Not as a rule. The Excludes1 note at block A15-A19, which applies to A18.89, lists "congenital tuberculosis (P37.0)". 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).
