ICD-10-CM 2027
ICD-10 code for optic 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) › optic (nerve trunk) (papilla)”. Page updated September 29, 2026.
About coding optic tuberculosis
The ICD-10-CM code for optic tuberculosis is A18.59 (Other tuberculosis of eye).
Within A18.5, choose A18.59 (Other tuberculosis of eye) only when documentation doesn't support a more specific option: unspecified (A18.50), tuberculous episcleritis (A18.51), tuberculous keratitis (A18.52), tuberculous chorioretinitis (A18.53) and tuberculous iridocyclitis (A18.54).
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 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471), DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), 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 02 (Diseases and Disorders of the Eye) 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 optic tuberculosis ICD-10 codes
What is the ICD-10 code for optic tuberculosis?
- A18.59 — Other tuberculosis of eye.
Is A18.59 billable?
- Yes. A18.59 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A18.59 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A18.59 as a principal diagnosis.
Is A18.59 a CC or MCC?
- A18.59 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.