2022

  1. ICD-10-CM Codes
    2. ›
  2. K00-K95 Diseases of the digestive system
    3. ›
  3. K00-K14 Diseases of oral cavity and salivary glands
    4. ›
  4. K12- Stomatitis and related lesions
    5. ›
  5. 2022 ICD-10-CM Diagnosis Code K12.3

2022 ICD-10-CM Diagnosis Code K12.3

Oral mucositis (ulcerative)

    2016 2017 2018 2019 2020 2021 2022 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 2022 edition of ICD-10-CM K12.3 became effective on October 1, 2021.
  • 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)

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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)

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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
    2022 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

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    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
  • 2022 (effective 10/1/2021): 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

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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)

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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)

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Includes
    • agranulocytosis
    • decreased absolute neurophile count (ANC)
    Type 1 Excludes
    • neutropenic splenomegaly (D73.81)
    • transient neonatal neutropenia (P61.5)
    Use Additional
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.

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