2027 ICD-10-CM Diagnosis Code K05Gingivitis and periodontal diseases

ICD-10-CM Codes›K00–K95›K00-K14›K05

ICD-10-CM K05
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K05 is a non-billable ICD-10-CM category code for gingivitis and periodontal diseases, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K05.00, K05.01, K05.10, and K05.11.

Code Identity

ICD-10-CM Code
K05
Billable Status
No — Non-Billable Category
Code Describes
Gingivitis and periodontal diseases
Short Description
Gingivitis and periodontal diseases
Same as the full description in the CMS dataset.
Chapter
K00-K14
Diseases of oral cavity and salivary glands

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK05Gingivitis and periodontal diseases
This CodeK05Gingivitis and periodontal diseases

Specific Coding for Gingivitis and periodontal diseasesOverview

Non-specific codes like K05 require more characters. Use one of these billable codes instead:

  • K05.0 for Acute gingivitis

  • Use K05.00 for Acute gingivitis, plaque induced

  • Use K05.01 for Acute gingivitis, non-plaque induced

  • K05.1 for Chronic gingivitis

  • Use K05.10 for Chronic gingivitis, plaque induced

  • Use K05.11 for Chronic gingivitis, non-plaque induced

  • K05.2 for Aggressive periodontitis

  • Use K05.20 for Aggressive periodontitis, unspecified

  • K05.21 for Aggressive periodontitis, localized

  • K05.22 for Aggressive periodontitis, generalized

  • K05.3 for Chronic periodontitis

  • Use K05.30 for Chronic periodontitis, unspecified

  • K05.31 for Chronic periodontitis, localized

  • K05.32 for Chronic periodontitis, generalized

  • Use K05.4 for Periodontosis

  • Use K05.5 for Other periodontal diseases

  • Use K05.6 for Periodontal disease, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K05: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K05, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming K05: its condition is not part of those codes, and both may be reported when the patient has both.

  • K13 Other diseases of lip and oral mucosa
    certain disorders of gingiva and edentulous alveolar ridge (K05-K06)

Patient EducationClinical

Gum Disease

If you have gum disease, you're not alone. Many U.S. adults currently have some form of the disease. It ranges from simple gum inflammation, called gingivitis, to serious damage to the tissue and bone supporting the teeth. In the worst cases, you can lose teeth.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K05Overview

What is the ICD-10 code for gingivitis and periodontal diseases?

K05 is the ICD-10-CM category for gingivitis and periodontal diseases, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is K05 (Gingivitis and periodontal diseases) a billable code?

No. This is a category header that groups the codes for gingivitis and periodontal diseases, and headers cannot be submitted on claims. Claims for gingivitis and periodontal diseases need a more specific code from this category, such as K05.00, K05.01, and K05.10.

Does K05 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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 listed in the Instructional Notes section. The additional code is reported after K05.