Is K12.3 a billable ICD-10-CM code?

No. K12.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does K12.3 sit in the tabular list?

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

K12.3

K12.3 — Oral mucositis (ulcerative)

Non-billable headerICD-10-CM

K12.3 is a non-billable header ICD-10-CM code for oral mucositis (ulcerative). It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

gastrointestinal mucositis (ulcerative) (K92.81)
mucositis (ulcerative) of vagina and vulva (N76.81)
nasal mucositis (ulcerative) (J34.81)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Mucositis (oral) (oropharyneal)

Risk adjustment

K12.3 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 K12.3

5 child codes. Green means billable.

Related codes at this level

Codes that share K12. If K12.3 is not quite right, the correct code is usually one of these.

Questions about K12.3

Is K12.3 a billable ICD-10-CM code?: No. K12.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does K12.3 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of oral cavity and salivary glands (K00-K14).