Tuberculosis of other organs (A18) ICD-10-CM
The A18 code range covers tuberculosis of other organs with 38 ICD-10-CM diagnosis codes. 32 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the A18 Range 38 codes · 32 billable
- A18 Tuberculosis of other organsNon-billable
- A18.0 Tuberculosis of bones and jointsNon-billable
- A18.01 Tuberculosis of spine
- A18.02 Tuberculous arthritis of other joints
- A18.03 Tuberculosis of other bones
- A18.09 Other musculoskeletal tuberculosis
- A18.1 Tuberculosis of genitourinary systemNon-billable
- A18.10 Tuberculosis of genitourinary system, unspecified
- A18.11 Tuberculosis of kidney and ureter
- A18.12 Tuberculosis of bladder
- A18.13 Tuberculosis of other urinary organs
- A18.14 Tuberculosis of prostate
- A18.15 Tuberculosis of other male genital organs
- A18.16 Tuberculosis of cervix
- A18.17 Tuberculous female pelvic inflammatory disease
- A18.18 Tuberculosis of other female genital organs
- A18.2 Tuberculous peripheral lymphadenopathy
- A18.3 Tuberculosis of intestines, peritoneum and mesenteric glandsNon-billable
- A18.31 Tuberculous peritonitis
- A18.32 Tuberculous enteritis
- A18.39 Retroperitoneal tuberculosis
- A18.4 Tuberculosis of skin and subcutaneous tissue
- A18.5 Tuberculosis of eyeNon-billable
- A18.50 Tuberculosis of eye, unspecified
- A18.51 Tuberculous episcleritis
- A18.52 Tuberculous keratitis
- A18.53 Tuberculous chorioretinitis
- A18.54 Tuberculous iridocyclitis
- A18.59 Other tuberculosis of eye
- A18.6 Tuberculosis of (inner) (middle) ear
- A18.7 Tuberculosis of adrenal glands
- A18.8 Tuberculosis of other specified organsNon-billable
- A18.81 Tuberculosis of thyroid gland
- A18.82 Tuberculosis of other endocrine glands
- A18.83 Tuberculosis of digestive tract organs, not elsewhere classified
- A18.84 Tuberculosis of heart
- A18.85 Tuberculosis of spleen
- A18.89 Tuberculosis of other sites
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A18 range.
Cardiac Tuberculosis
Tuberculosis affecting the heart.
Erythema Induratum
A type of panniculitis characterized histologically by the presence of granulomas, vasculitis, and necrosis. It is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. It is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. The nodules may progress to form indurations, ulcerations, and scars.
Peritonitis, Tuberculous
A form of PERITONITIS seen in patients with TUBERCULOSIS, characterized by lesion either as a miliary form or as a pelvic mass on the peritoneal surfaces. Most patients have ASCITES, abdominal swelling, ABDOMINAL PAIN, and other systemic symptoms such as FEVER; WEIGHT LOSS; and ANEMIA.
Pott Disease
Tuberculosis of the vertebrae.
About the A18 Code Range
Tuberculosis in this category affects sites such as bones, joints, urinary and reproductive organs, the eye, and the skin.
A18 groups the codes by affected site. Bones and joints split into the spine, other joints, other bones, and other musculoskeletal sites. Urinary and reproductive sites split into specific organs, including the kidney, bladder, prostate, and cervix.
Other groups identify lymph nodes, the intestines and abdominal lining, skin, the ear, and adrenal glands. Eye codes distinguish specific parts of the eye. The remaining specified-organ group separates the thyroid, other endocrine glands, digestive tract organs, heart, spleen, and other sites.
Questions About This Page
How many billable codes are in the A18 range?
Of the 38 codes in this range, 32 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the A18 range classify?
The range classifies tuberculosis of other organs. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
