2026 ICD-10-CM Diagnosis Code K05.30Chronic periodontitis, unspecified

ICD-10-CM Codes›K00–K95›K00-K14›K05

ICD-10-CM K05.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K05.30 is a billable ICD-10-CM diagnosis code for chronic periodontitis, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; Caries, periodontitis, and other preventable dental conditions; and Disorders of teeth and gingiva.

Code Identity

ICD-10-CM Code
K05.30
Billable Status
Yes — Valid for Submission
Code Describes
Chronic periodontitis, unspecified
Short Description
Chronic periodontitis, unspecified
Same as the full description in the CMS dataset.
Parent Code
K05.3
Chronic periodontitis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK05Gingivitis and periodontal diseases
This CodeK05.30Chronic periodontitis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acroosteolysis
  • Alopecia universalis
  • Alopecia, psychomotor epilepsy, periodontal pyorrhea, intellectual disability syndrome
  • Alveolar pyorrhea
  • Campylobacter periodontitis
  • Campylobacteriosis
  • Chronic pericoronitis
  • Chronic periodontitis
  • Chronic periodontitis complex
  • Chronic periodontitis simplex
  • Chronic periodontitis with drifting of teeth
  • Congenital hypotrichia
  • Developmental anomaly of periodontal tissue
  • Generalized gingivitis
  • Generalized gingivitis with reduced periodontal tissue and stable periodontitis
  • Hereditary acroosteolysis
  • Hypotrichosis, osteolysis, periodontitis, palmoplantar keratoderma syndrome
  • Localized gingivitis
  • Localized gingivitis with reduced periodontal tissue and stable periodontitis
  • Marginal periodontitis
  • Molar and incisor pattern periodontitis
  • Pericoronitis
  • Periodontitis
  • Periodontitis as manifestation of systemic disease
  • Periodontitis caused by dental appliance
  • Periodontitis co-occurrent with genetic disorder
  • Periodontitis co-occurrent with hematologic disorder
  • Periodontitis co-occurrent with leukemia
  • Periodontitis due to anatomic tooth factor
  • Periodontitis due to cervical root resorption
  • Periodontitis due to congenital neutropenia
  • Periodontitis due to defective dental restoration
  • Periodontitis due to Ehlers-Danlos syndrome type 4
  • Periodontitis due to fracture of root of tooth
  • Periodontitis due to histiocytosis syndrome
  • Periodontitis due to infantile genetic agranulocytosis
  • Periodontitis due to leukocyte adhesion deficiency
  • Periodontitis due to occlusal trauma
  • Periodontitis due to Papillon-Lefèvre syndrome
  • Periodontitis exacerbated by acquired neutropenia
  • Periodontitis exacerbated by Chédiak-Higashi syndrome
  • Periodontitis exacerbated by chronic familial neutropenia
  • Periodontitis exacerbated by Cohen syndrome
  • Periodontitis exacerbated by cyclical neutropenia
  • Periodontitis exacerbated by Down syndrome
  • Periodontitis exacerbated by familial neutropenia
  • Periodontitis exacerbated by glycogen storage disease
  • Periodontitis exacerbated by human immunodeficiency virus infection
  • Periodontitis exacerbated by hypophosphatasia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Periodontitis(chronic) (complex) (compound) (local) (simplex)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR DEN003
Caries, periodontitis, and other preventable dental conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG002
Disorders of teeth and gingiva
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Chronic Periodontitis

    chronic inflammation and loss of periodontium that is associated with the amount of dental plaque or dental calculus present. chronic periodontitis occurs mostly in adults and was called adult periodontitis, but this disease can appear in young people.

  • Pericoronitis

    inflammation of the gingiva surrounding the crown of a tooth.

  • Aggressive Periodontitis

    inflammation and loss of periodontium that is characterized by rapid attachment loss and bone destruction in the presence of little local factors such as dental plaque and dental calculus. this highly destructive form of periodontitis often occurs in young people and was called early-onset periodontitis, but this disease also appears in old people.

  • Periapical Abscess

    acute or chronic inflammation of tissues surrounding the apical portion of a tooth, associated with the collection of pus, resulting from infection following pulp infection through a carious lesion or as a result of an injury causing pulp necrosis. (dorland, 27th ed)

  • Periapical Granuloma

    chronic nonsuppurative inflammation of periapical tissue resulting from irritation following pulp disease or endodontic treatment.

  • Periapical Periodontitis

    inflammation of the periapical tissue. it includes general, unspecified, or acute nonsuppurative inflammation. chronic nonsuppurative inflammation is periapical granuloma. suppurative inflammation is periapical abscess.

  • Periodontitis

    inflammation and loss of connective tissues supporting or surrounding the teeth. this may involve any part of the periodontium. periodontitis is currently classified by disease progression (chronic periodontitis; aggressive periodontitis) instead of age of onset. (from 1999 international workshop for a classification of periodontal diseases and conditions, american academy of periodontology)

  • Chronic Periodontitis

    a chronic inflammatory process that affects the tissues that surround and support the teeth.

  • Acroosteolysis

    a condition that is characterized by degeneration of the distal phalanges.

  • Acute Periodontitis

    an acute inflammatory process that affects the tissues that surround and support the teeth.

  • Periodontitis

    an acute or chronic inflammatory process that affects the tissues that surround and support the teeth.

  • Chronic Pericoronitis

    long-term inflammation of the gingiva surrounding the crown of a tooth, usually of an incompletely erupted tooth.

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.

Convert K05.30 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
523.40 Chronc periodontitis NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K05.30Overview

Is K05.30 (Chronic periodontitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chronic periodontitis, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K05.30 group to?

When chronic periodontitis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K05.30?

Under the General Equivalence Mappings, chronic periodontitis, unspecified converts to ICD-9-CM 523.40 (chronc periodontitis NOS). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.