Is K12 a billable ICD-10-CM code?

No. K12 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does K12 sit in the tabular list?

Diseases of the digestive system (K00-K95), in the block Diseases of oral cavity and salivary glands (K00-K14).

What cannot be coded together with K12?

K12 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

K12

K12 — Stomatitis and related lesions

Non-billable headerICD-10-CM

K12 is a non-billable header ICD-10-CM code for stomatitis and related lesions. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

cancrum oris (A69.0)
cheilitis (K13.0)
gangrenous stomatitis (A69.0)
herpesviral [herpes simplex] gingivostomatitis (B00.2)
noma (A69.0)

Use additional code

Add a secondary code to capture the detail described below.

code to identify:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Risk adjustment

K12 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 K12

4 child codes. Green means billable.

Questions about K12

Is K12 a billable ICD-10-CM code?: No. K12 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does K12 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of oral cavity and salivary glands (K00-K14).
What cannot be coded together with K12?: K12 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.