A18 — Tuberculosis of other organs
Is A18 billable?
No — A18 is a non-billable header code. A18 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 32 billable codes beneath A18.
Billable codes under this header
- A18.2Tuberculous peripheral lymphadenopathy
- A18.4Tuberculosis of skin and subcutaneous tissue
- A18.6Tuberculosis of (inner) (middle) ear
- A18.7Tuberculosis of adrenal glands
- A18.01Tuberculosis of spine
- A18.02Tuberculous arthritis of other joints
- A18.03Tuberculosis of other bones
- A18.09Other musculoskeletal tuberculosis
- A18.10Tuberculosis of genitourinary system, unspecified
- A18.11Tuberculosis of kidney and ureter
- A18.12Tuberculosis of bladder
- A18.13Tuberculosis of other urinary organs
- A18.14Tuberculosis of prostate
- A18.15Tuberculosis of other male genital organs
- A18.16Tuberculosis of cervix
- A18.17Tuberculous female pelvic inflammatory disease
- A18.18Tuberculosis of other female genital organs
- A18.31Tuberculous peritonitis
- A18.32Tuberculous enteritis
- A18.39Retroperitoneal tuberculosis
- A18.50Tuberculosis of eye, unspecified
- A18.51Tuberculous episcleritis
- A18.52Tuberculous keratitis
- A18.53Tuberculous chorioretinitis
- A18.54Tuberculous iridocyclitis
- A18.59Other tuberculosis of eye
- A18.81Tuberculosis of thyroid gland
- A18.82Tuberculosis of other endocrine glands
- A18.83Tuberculosis of digestive tract organs, not elsewhere classified
- A18.84Tuberculosis of heart
- A18.85Tuberculosis of spleen
- A18.89Tuberculosis of other sites
A18 at a glance
| Code | A18 |
|---|---|
| Description | Tuberculosis of other organs |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from A15-A19
The conditions below can never be reported together with A18 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- 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)
Use additional code — inherited from Chapter 1
Report an additional code alongside A18 to fully describe the condition. A18 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Use additional code — inherited from A15-A19
Report an additional code alongside A18 to fully describe the condition. A18 is sequenced first.
- code, if applicable, for associated cachexia (E88.A)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A18, but a patient may have both at the same time. When documentation supports it, A18 and the excluded code may both 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)
What codes fall under A18? (9)
- A18.0Tuberculosis of bones and jointsnot billable
- A18.1Tuberculosis of genitourinary systemnot billable
- A18.2Tuberculous peripheral lymphadenopathy
- A18.3Tuberculosis of intestines, peritoneum and mesenteric glandsnot billable
- A18.4Tuberculosis of skin and subcutaneous tissue
- A18.5Tuberculosis of eyenot billable
- A18.6Tuberculosis of (inner) (middle) ear
- A18.7Tuberculosis of adrenal glands
- A18.8Tuberculosis of other specified organsnot billable
How long has A18 existed?
A18 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.