2026 ICD-10-CM Diagnosis Code K08.9Disorder of teeth and supporting structures, unspecified

ICD-10-CM Codes›K00–K95›K00-K14›K08

ICD-10-CM K08.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K08.9 is a billable ICD-10-CM diagnosis code for disorder of teeth and supporting structures, 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
K08.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of teeth and supporting structures, unspecified
Short Description
Disorder of teeth and supporting structures, unspecified
Same as the full description in the CMS dataset.
Parent Code
K08
Other disorders of teeth and supporting structures

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK08Other disorders of teeth and supporting structures
This CodeK08.9Disorder of teeth and supporting structures, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Alveolar ridge abnormality
  • Articulatory defect due to dental defect
  • Chronic disease of teeth AND/OR supporting structures
  • Disorder of teeth AND/OR supporting structures
  • Disorder of tooth due to Sjögren's syndrome
  • Hereditary disorder of tooth
  • Impaired dentition
  • Maxillary sinusitis due to dental disorder
  • Non cavitated coronal lesion
  • Oral cavity, dental and salivary gland disorder
  • Physical health problem
  • Problem of jaw
  • Scar at apex of tooth
  • Serious physical health problem
  • Teeth requiring immediate treatment
  • Tooth disorder
  • Tooth problem
  • Tooth symptoms

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.

    • Abnormal, abnormality, abnormalities
      • alveolar ridge
    • Disease, diseased
      • alveoli, teeth
    • Disease, diseased
      • supporting structures of teeth
    • Disease, diseased
      • tooth, teeth
    • Disorder(of)
      • tooth
    • Lesion(s) (nontraumatic)
      • alveolar process
    • Lesion(s) (nontraumatic)
      • tooth, teeth

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

Patient EducationClinical

Tooth Disorders

Your teeth are made of a hard, bonelike material. There are four parts:

The full article covers:

  • What are teeth?
  • What are tooth disorders?
  • What causes tooth disorders?
  • What are the symptoms of tooth disorders?
  • How are tooth disorders diagnosed?
  • What are the treatments for tooth disorders?
  • Can tooth disorders be prevented?

Read the full article at MedlinePlus

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

Convert K08.9 to ICD-9-CMHistory

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

ICD-9-CM
525.9 Dental disorder 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 K08.9Overview

Is K08.9 (Other disorders of teeth and supporting structures) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of teeth and supporting structures, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K08.9 group to?

When disorder of teeth and supporting structures, 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 K08.9?

Under the General Equivalence Mappings, disorder of teeth and supporting structures, unspecified converts to ICD-9-CM 525.9 (dental disorder NOS). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.