2026 ICD-10-CM Diagnosis Code K01.1Impacted teeth

ICD-10-CM Codes›K00–K95›K00-K14›K01

ICD-10-CM K01.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K01.1 is a billable ICD-10-CM diagnosis code for impacted 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, Disorders of teeth and gingiva, and Nontraumatic dental conditions.

Code Identity

ICD-10-CM Code
K01.1
Billable Status
Yes — Valid for Submission
Code Describes
Impacted teeth
Short Description
Impacted teeth
Same as the full description in the CMS dataset.
Parent Code
K01
Embedded and impacted teeth

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK01Embedded and impacted teeth
This CodeK01.1Impacted teeth

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Buccal impaction
  • Completely impacted tooth in bone
  • Complicated impacted tooth
  • Developmental abnormality of canine tooth
  • Developmental abnormality of premolar tooth
  • External resorption of tooth
  • Failure of tooth eruption
  • Failure of tooth eruption associated with tooth impaction
  • Impacted incisors
  • Impacted molars
  • Impacted permanent canine tooth
  • Impacted premolars
  • Impacted third molar tooth
  • Impacted tooth
  • Impacted tooth in soft tissue
  • Palatal impaction
  • Partially impacted tooth
  • Partially impacted tooth in bone
  • Pathological external resorption of tooth due to impacted tooth

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.

    • Impaction, impacted
      • dental (same or adjacent tooth)
    • Impaction, impacted
      • 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 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 K01.1 to ICD-9-CMHistory

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

ICD-9-CM
520.6 Tooth eruption disturb
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 K01.1Overview

Is K01.1 (Embedded and impacted teeth) a billable code?

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

What MS-DRG does K01.1 group to?

When impacted 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 K01.1?

Under the General Equivalence Mappings, impacted teeth converts to ICD-9-CM 520.6 (tooth eruption disturb). 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.