K05.21Header code — not billable
Aggressive periodontitis, localized
- Chapter
- 11. Diseases of the digestive system
- Category
- K05
- Effective date
- October 1, 2026
Related codes in category K05
K05Gingivitis and periodontal diseasesK05.0Acute gingivitisK05.00Acute gingivitis, plaque inducedYesK05.01Acute gingivitis, non-plaque inducedYesK05.1Chronic gingivitisK05.10Chronic gingivitis, plaque inducedYesK05.11Chronic gingivitis, non-plaque inducedYesK05.2Aggressive periodontitisK05.20Aggressive periodontitis, unspecifiedYesK05.211Aggressive periodontitis, localized, slightYesK05.212Aggressive periodontitis, localized, moderateYesK05.213Aggressive periodontitis, localized, severeYes
Frequently asked questions
What is ICD-10 code K05.21?
K05.21 is an ICD-10-CM diagnosis code for Aggressive periodontitis, localized.
Is K05.21 a billable code?
No. K05.21 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is K05.21 in?
K05.21 falls under Chapter 11: Diseases of the digestive system.
When did K05.21 become effective?
K05.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to K05.21?
K05.21 belongs to category K05, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.