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ICD-10-CM 2027 diagnosis code

K05.3Chronic periodontitis

Not billable — use a more specific code

K05.3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K05.3

K05.3 is the ICD-10-CM diagnosis code for chronic periodontitis. It belongs to category K05 (gingivitis and periodontal diseases), block K00-K14 (diseases of oral cavity and salivary glands) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within K05 (gingivitis and periodontal diseases), K05.3 is specifically for chronic periodontitis. Related codes cover acute gingivitis (K05.0), chronic gingivitis (K05.1), aggressive periodontitis (K05.2), Periodontosis (K05.4), other periodontal diseases (K05.5) and periodontal disease, unspecified (K05.6).

To report this condition, pick the subcode that matches the documentation: K05.30 (unspecified), K05.31 (localized) and K05.32 (generalized).

Don't report K05.3 together with the conditions in its Excludes1 note: chronic apical periodontitis (K04.5).

Use an 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) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under K05.3

Coding notes

Applicable toConditions and synonyms classified to this code
  • Chronic pericoronitis
  • Complex periodontitis
  • Periodontitis NOS
  • Simplex periodontitis
Excludes1Not coded here — never report together with this code
  • chronic apical periodontitis (K04.5)

Notes that apply from higher levels

Instructions written at a parent level also apply to K05.3.

› From K05 Gingivitis and periodontal diseases
Use additional code
  • 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)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Codes whose notes reference K05.3

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K05.3

Is K05.3 billable?

No. K05.3 is a header code. Report one of its more specific subcodes instead.