K12.39 — Other oral mucositis (ulcerative)
Is K12.39 billable?
Yes — K12.39 is billable for FY2027. K12.39 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. K12.39 may be submitted for encounters from October 1, 2026 through September 30, 2027.
K12.39 at a glance
| Code | K12.39 |
|---|---|
| Description | Other oral mucositis (ulcerative) |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does K12.39 group to?
K12.39 sits in MDC Pre and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 011Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCCsurgical
- 012Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CCsurgical
- 013Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCCsurgical
How is K12.39 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to K12.39. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Mucositis › mouth › specified NEC (ulcerative)
- Mucositis › mouth › viral (ulcerative)
Inclusion terms
Alternative wording in documentation that is classified to K12.39.
- Viral oral mucositis (ulcerative)
Excludes1 — never code together — inherited from K12
The conditions below can never be reported together with K12.39 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from K12
Report an additional code alongside K12.39 to fully describe the condition. K12.39 is sequenced first.
- 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)
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K12.39, but a patient may have both at the same time. When documentation supports it, K12.39 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from K12.3
The conditions below are not part of K12.39, but a patient may have both at the same time. When documentation supports it, K12.39 and the excluded code may both be reported.
How long has K12.39 existed?
K12.39 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.