ICD-10-CM Codes
K00-K95 Diseases of the digestive system
K00-K14 Diseases of oral cavity and salivary glands
K12- Stomatitis and related lesions
2021 ICD-10-CM Diagnosis Code K12.3

2021 ICD-10-CM Diagnosis Code K12.3

Oral mucositis (ulcerative)

2016

2017

2018

2019

2020

2021

Non-Billable/Non-Specific Code

K12.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2021 edition of ICD-10-CM K12.3 became effective on October 1, 2020.
This is the American ICD-10-CM version of K12.3 - other international versions of ICD-10 K12.3 may differ.

Applicable To

Mucositis (oral) (oropharyneal)

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (K12.3) and the excluded code together.

gastrointestinal mucositis (ulcerative) (
ICD-10-CM Diagnosis Code K92.81
Gastrointestinal mucositis (ulcerative)
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- mucositis (ulcerative) of vagina and vulva (N76.81)
- nasal mucositis (ulcerative) (J34.81)
- oral mucositis (ulcerative) (K12.3-)
K92.81
)
mucositis (ulcerative) of vagina and vulva (
ICD-10-CM Diagnosis Code N76.81
Mucositis (ulcerative) of vagina and vulva
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- gastrointestinal mucositis (ulcerative) (K92.81)
- nasal mucositis (ulcerative) (J34.81)
- oral mucositis (ulcerative) (K12.3-)
N76.81
)
nasal mucositis (ulcerative) (
ICD-10-CM Diagnosis Code J34.81
Nasal mucositis (ulcerative)
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- gastrointestinal mucositis (ulcerative) (K92.81)
- mucositis (ulcerative) of vagina and vulva (N76.81)
- oral mucositis (ulcerative) (K12.3-)
J34.81
)

The following code(s) above K12.3 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to K12.3:

K00-K95
2021 ICD-10-CM Range K00-K95
Diseases of the digestive system
Type 2 Excludes
- 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)
Diseases of the digestive system
K12
ICD-10-CM Diagnosis Code K12
Stomatitis and related lesions
Type 1 Excludes
- cancrum oris (A69.0)
- cheilitis (K13.0)
- gangrenous stomatitis (A69.0)
- herpesviral [herpes simplex] gingivostomatitis (B00.2)
- noma (A69.0)
Use Additional
- 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)
Stomatitis and related lesions

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Code annotations containing back-references to K12.3:

Type 2 Excludes: N76.81
, J34.81
, K92.81

ICD-10-CM Diagnosis Code N76.81
Mucositis (ulcerative) of vagina and vulva
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- gastrointestinal mucositis (ulcerative) (K92.81)
- nasal mucositis (ulcerative) (J34.81)
- oral mucositis (ulcerative) (K12.3-)
ICD-10-CM Diagnosis Code J34.81
Nasal mucositis (ulcerative)
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- gastrointestinal mucositis (ulcerative) (K92.81)
- mucositis (ulcerative) of vagina and vulva (N76.81)
- oral mucositis (ulcerative) (K12.3-)
ICD-10-CM Diagnosis Code K92.81
Gastrointestinal mucositis (ulcerative)
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs (T45.1X-)
- radiological procedure and radiotherapy (Y84.2)
Type 2 Excludes
- mucositis (ulcerative) of vagina and vulva (N76.81)
- nasal mucositis (ulcerative) (J34.81)
- oral mucositis (ulcerative) (K12.3-)
Use Additional: D70

ICD-10-CM Diagnosis Code D70
Neutropenia
Includes
- agranulocytosis
- decreased absolute neurophile count (ANC)
Type 1 Excludes
- neutropenic splenomegaly (D73.81)
- transient neonatal neutropenia (P61.5)
Use Additional
- code for any associated:
- fever (R50.81)
- mucositis (J34.81, K12.3-, K92.81, N76.81)

ICD-10-CM Codes Adjacent To K12.3

K11.4 Fistula of salivary gland

K11.5 Sialolithiasis

K11.6 Mucocele of salivary gland

K11.7 Disturbances of salivary secretion

K11.8 Other diseases of salivary glands

K11.9 Disease of salivary gland, unspecified

K12 Stomatitis and related lesions

K12.0 Recurrent oral aphthae

K12.1 Other forms of stomatitis

K12.2 Cellulitis and abscess of mouth

K12.3 Oral mucositis (ulcerative)

K12.30 …… unspecified

K12.31 …… due to antineoplastic therapy

K12.32 …… due to other drugs

K12.33 …… due to radiation

K12.39 Other oral mucositis (ulcerative)

K13 Other diseases of lip and oral mucosa

K13.0 Diseases of lips

K13.1 Cheek and lip biting

K13.2 Leukoplakia and other disturbances of oral epithelium, including tongue

K13.21 Leukoplakia of oral mucosa, including tongue

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code K12.3

Oral mucositis (ulcerative)

Gastrointestinal mucositis (ulcerative)

Mucositis (ulcerative) of vagina and vulva

Nasal mucositis (ulcerative)

Diseases of the digestive system

Stomatitis and related lesions

Mucositis (ulcerative) of vagina and vulva

Nasal mucositis (ulcerative)

Gastrointestinal mucositis (ulcerative)

Neutropenia