Aggressive periodontitis, localized
- K05.21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2025 edition of ICD-10-CM K05.21 became effective on October 1, 2024.
- This is the American ICD-10-CM version of K05.21 – other international versions of ICD-10 K05.21 may differ.
Applicable To
- Periodontal abscess
The following code(s) above K05.21 contain annotation back-references
that may be applicable to K05.21:
- K00-K95 Diseases of the digestive system
- K05 Gingivitis and periodontal diseases
- K05.2 Aggressive periodontitis
Approximate Synonyms
- Aggressive localized periodontitis
Clinical Information
- Localized circumscribed purulent area of inflammation in the periodontal tissue. It is a derivative of marginal periodontitis and commonly associated with suprabony and infrabony pockets and interradicular involvements, in contrast to periapical abscess which is attributable to pulp necrosis.
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): Deleted code
- 2017 (effective 10/1/2016): New code
- 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
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
- 2025 (effective 10/1/2024): No change
Code annotations containing back-references to K05.21:
- Type 2 Excludes: K12.2