2026 ICD-10-CM Diagnosis Code K03.0Excessive attrition of teeth

ICD-10-CM Codes›K00–K95›K00-K14›K03

ICD-10-CM K03.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K03.0 is a billable ICD-10-CM diagnosis code for excessive attrition of teeth. 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
K03.0
Billable Status
Yes — Valid for Submission
Code Describes
Excessive attrition of teeth
Short Description
Excessive attrition of teeth
Same as the full description in the CMS dataset.
Parent Code
K03
Other diseases of hard tissues of teeth

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK03Other diseases of hard tissues of teeth
This CodeK03.0Excessive attrition of teeth

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal tooth attrition
  • Approximal tooth wear
  • Approximal wear of teeth
  • Attrition of crown of tooth due to masticatory forces
  • Attrition of tooth crown associated with aging
  • Attrition of tooth due to teeth grinding
  • Excessive attrition of teeth
  • Irregularities of wear of tooth
  • Loss of teeth due to attrition
  • Occlusal wear of teeth
  • Tooth surface loss

Tabular List NotesGuidance

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

Inclusion Terms

  • Approximal wear of teeth
  • Occlusal wear of teeth

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.

    • Approximal wear
    • Attrition
      • tooth, teeth (excessive) (hard tissues)
    • Excess, excessive, excessively
      • attrition, tooth, teeth
    • Occlusal wear, teeth
    • Wear, worn(with normal or routine use)
      • tooth, teeth (approximal) (hard tissues) (interproximal) (occlusal)

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 K03.0 to ICD-9-CMHistory

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

ICD-9-CM
521.10 Excessive attrition NOS
Approximate The match is approximate rather than exact.

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 K03.0Overview

Is K03.0 (Other diseases of hard tissues of teeth) a billable code?

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

What MS-DRG does K03.0 group to?

When excessive attrition of teeth 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 K03.0?

Under the General Equivalence Mappings, excessive attrition of teeth converts to ICD-9-CM 521.10 (excessive attrition NOS). The mapping is approximate, so confirm the match fits the documentation.

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.