2026 ICD-10-CM Diagnosis Code K08.81Primary occlusal trauma

ICD-10-CM Codes›K00–K95›K00-K14›K08

ICD-10-CM K08.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K08.81 is a billable ICD-10-CM diagnosis code for primary occlusal trauma. 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 injury of periodontal tissue. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury and Disorders of teeth and gingiva.

Code Identity

ICD-10-CM Code
K08.81
Billable Status
Yes — Valid for Submission
Code Describes
Primary occlusal trauma
Short Description
Primary occlusal trauma
Same as the full description in the CMS dataset.
Parent Code
K08.8
Other specified 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 CodeK08.81Primary occlusal trauma

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Injury of periodontal tissue
  • Occlusal trauma
  • Primary occlusal trauma

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.

    • Trauma, traumatism
      • occlusal
        • primary

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 DIG002
Disorders of teeth and gingiva
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert K08.81 to ICD-9-CMHistory

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

ICD-9-CM
525.8 Dental disorder NEC
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement K08.81 replaces the following previously assigned code(s):

  • K08.8 - Other specified disorders of teeth and supporting structures
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K08.81Overview

Is K08.81 (Other specified disorders of teeth and supporting structures) a billable code?

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

What MS-DRG does K08.81 group to?

When primary occlusal trauma 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 K08.81?

Under the General Equivalence Mappings, primary occlusal trauma converts to ICD-9-CM 525.8 (dental disorder NEC). 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.