2025 ICD-10-CM Diagnosis Code K00.4

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Disturbances in tooth formation

  • K00.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM K00.4 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of K00.4 – other international versions of ICD-10 K00.4 may differ.

Applicable To

  • Aplasia and hypoplasia of cementum
  • Dilaceration of tooth
  • Enamel hypoplasia (neonatal) (postnatal) (prenatal)
  • Regional odontodysplasia
  • Turner’s tooth

Type 1 Excludes

  • Hutchinson’s teeth and mulberry molars in congenital syphilis (A50.5)

Type 2 Excludes

The following code(s) above K00.4 contain annotation back-references

 that may be applicable to K00.4:

  • K00-K95  Diseases of the digestive system
  • K00  Disorders of tooth development and eruption

Approximate Synonyms

  • Disturbance of tooth formation
  • Tooth formation, abnormal

Clinical Information

  • A localized arrested tooth development which appears to involve most commonly the anterior teeth, usually on one side of the midline, most often the maxillary central and lateral incisors. Roentgenographically, the teeth have a ghostlike appearance. Calcification and bits of prismatic enamel may be found in the pulp and the enamel is thin and absent in part. (jablonski, illustrated dictionary of dentistry, 1982)

ICD-10-CM K00.4 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 011 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with mcc
  • 012 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with cc
  • 013 Tracheostomy for face, mouth and neck diagnoses or laryngectomy without cc/mcc
  • 157 Dental and oral diseases with mcc
  • 158 Dental and oral diseases with cc
  • 159 Dental and oral diseases without cc/mcc

Convert K00.4 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to K00.4:

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