A18
A18 — Tuberculosis of other organs
Non-billable headerICD-10-CM
A18 is a non-billable header ICD-10-CM code for tuberculosis of other organs. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with A18
These codes carry an Excludes1 note pointing at A18. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A18 alone.
- A04Other bacterial intestinal infections
- L52Erythema nodosum
- L93Lupus erythematosus
- M01Direct infections of joint in infectious and parasitic diseases classified elsewhere
- M49Spondylopathies in diseases classified elsewhere
- M63Disorders of muscle in diseases classified elsewhere
- A18.83Tuberculosis of digestive tract organs, not elsewhere classified
- N29Other disorders of kidney and ureter in diseases classified elsewhere
Risk adjustment
A18 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead A18
9 child codes. Green means billable.
- A18.0Tuberculosis of bones and joints
- A18.1Tuberculosis of genitourinary system
- A18.2Tuberculous peripheral lymphadenopathy
- A18.3Tuberculosis of intestines, peritoneum and mesenteric glands
- A18.4Tuberculosis of skin and subcutaneous tissue
- A18.5Tuberculosis of eye
- A18.6Tuberculosis of (inner) (middle) ear
- A18.7Tuberculosis of adrenal glands
- A18.8Tuberculosis of other specified organs
Questions about A18
- Is A18 a billable ICD-10-CM code?
- No. A18 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does A18 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Tuberculosis (A15-A19).