Is K12.33 a billable ICD-10-CM code?

Yes. K12.33 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does K12.33 sit in the tabular list?

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

K12.33

K12.33 — Oral mucositis (ulcerative) due to radiation

Billable / specific codeICD-10-CM

K12.33 is a billable, specific ICD-10-CM code for oral mucositis (ulcerative) due to radiation. It is valid for submission on a claim.

Use additional code

Add a secondary code to capture the detail described below.

external cause code (W88-W90, X39.0-) to identify cause

Risk adjustment

K12.33 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.

Medicare coverage

K12.33 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders

How K12.33 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K12.33.

Mucositis›mouth›due to radiation

Related codes at this level

Codes that share K12.3. If K12.33 is not quite right, the correct code is usually one of these.

Questions about K12.33

Is K12.33 a billable ICD-10-CM code?: Yes. K12.33 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does K12.33 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of oral cavity and salivary glands (K00-K14).