2026 ICD-10-CM Diagnosis Code K08.50Unsatisfactory restoration of tooth, unspecified

ICD-10-CM Codes›K00–K95›K00-K14›K08

ICD-10-CM K08.50
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K08.50 is a billable ICD-10-CM diagnosis code for unsatisfactory restoration of tooth, 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. Coders also document this condition as defective dental restoration. 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
K08.50
Billable Status
Yes — Valid for Submission
Code Describes
Unsatisfactory restoration of tooth, unspecified
Short Description
Unsatisfactory restoration of tooth, unspecified
Same as the full description in the CMS dataset.
Parent Code
K08.5
Unsatisfactory restoration of tooth

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK08Other disorders of teeth and supporting structures
This CodeK08.50Unsatisfactory restoration of tooth, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Defective dental restoration
  • Defective mandibular complete denture
  • Dental restoration unserviceable
  • Gingival disease caused by dental restorative material
  • Periodontitis due to defective dental restoration
  • Secondary dental caries associated with failed or defective dental restoration
  • Secondary dental caries associated with local or systemic factors
  • Tooth restoration failure
  • Unsatisfactory tooth restoration

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Defective dental restoration NOS

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.

    • Defect, defective
      • dental restoration
    • Defect, defective
      • restoration, dental
    • Dental
      • restoration
        • defective
    • Restoration(of)
      • dental
        • defective
    • Restoration(of)
      • unsatisfactory, of tooth
    • Unsatisfactory
      • restoration of tooth

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 K08.50 to ICD-9-CMHistory

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

ICD-9-CM
525.60 Unsat restore tooth 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 K08.50Overview

Is K08.50 (Unsatisfactory restoration of tooth) a billable code?

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

What MS-DRG does K08.50 group to?

When unsatisfactory restoration of tooth, 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 K08.50?

Under the General Equivalence Mappings, unsatisfactory restoration of tooth, unspecified converts to ICD-9-CM 525.60 (unsat restore tooth 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.