ICD-10-CM 2027
ICD-10 code for Endarteritis tuberculosis
From the official ICD-10-CM alphabetic index entry “Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › endarteritis”. Page updated September 29, 2026.
About coding Endarteritis tuberculosis
The ICD-10-CM code for Endarteritis tuberculosis is A18.89 (Tuberculosis of other sites).
Within A18.8, choose A18.89 (other sites) only when documentation doesn't support a more specific option: thyroid gland (A18.81), other endocrine glands (A18.82), digestive tract organs, not elsewhere classified (A18.83), heart (A18.84) and spleen (A18.85).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235), DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Endarteritis tuberculosis ICD-10 codes
What is the ICD-10 code for Endarteritis tuberculosis?
- A18.89 — Tuberculosis of other sites.
Is A18.89 billable?
- Yes. A18.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A18.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A18.89 as a principal diagnosis.
Is A18.89 a CC or MCC?
- A18.89 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.