2025 ICD-10-CM Diagnosis Code K00.2

Abnormalities of size and form of teeth

• K00.2 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 K00.2 became effective on October 1, 2024.
• This is the American ICD-10-CM version of K00.2 – other international versions of ICD-10 K00.2 may differ.

Applicable To

• Concrescence of teeth
• Fusion of teeth
• Gemination of teeth
• Dens evaginatus
• Dens in dente
• Dens invaginatus
• Enamel pearls
• Macrodontia
• Microdontia
• Peg-shaped [conical] teeth
• Supernumerary roots
• Taurodontism
• Tuberculum paramolare

Type 1 Excludes

• abnormalities of teeth due to congenital syphilis (A50.5)
• tuberculum Carabelli, which is regarded as a normal variation and should not be coded

The following code(s) above K00.2 contain annotation back-references

 that may be applicable to K00.2:

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

Approximate Synonyms

• Abnormal form of teeth
• Abnormal size of teeth
• Abnormal size of tooth
• Abnormally formed tooth

Clinical Information

• Anomaly of the tooth, found chiefly in upper lateral incisors. It is characterized by invagination of the enamel at the incisal edge.
• Two teeth united during development by the union of their tooth germs; the teeth may be joined by the enamel of their crowns, by their root dentin, or by both.

ICD-10-CM K00.2 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 K00.2 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

Code annotations containing back-references to K00.2:

• Type 2 Excludes: K00.1

Diagnosis Index entries containing back-references to K00.2:

• Abnormal, abnormality, abnormalities – see also Anomaly
  • form
    • teeth K00.2
  • size, tooth, teeth K00.2
  • tooth, teeth K00.2 (form) (size)
• Accessory (congenital)
  • roots K00.2 (teeth)
• Anomaly, anomalous (congenital) (unspecified type) Q89.9
  • form, teeth K00.2
• Concrescence K00.2 (teeth)
• Conical
  • teeth K00.2
• DeformityQ89.9
  • tooth, teeth K00.2
• Dens evaginatus, in dente or invaginatus K00.2
• Dichotomy, teeth K00.2
• Elongated, elongation (congenital) – see also Distortion
  • tooth, teeth K00.2
• Enamel pearls K00.2
• Enameloma K00.2
• Fusion, fused (congenital)
  • tooth, teeth K00.2
• Gemination, tooth, teeth K00.2
• Macrodontia K00.2
• Microdontia K00.2
• Molarization of premolars K00.2
• Pearl(s)
  • enamel K00.2
• Peg-shaped teeth K00.2
• Predeciduous teeth K00.2
• Premolarization, cuspids K00.2
• Schizodontia K00.2
• Shovel-shaped incisors K00.2
• Spicule tooth K00.2
• Supernumerary (congenital)
  • roots K00.2 (of teeth)
• Synodontia K00.2
• Taurodontism K00.2
• T-shaped incisors K00.2
• Tuberculum
  • Carabelli K00.2 – see Note at
  • occlusal K00.2 – see Note at
  • paramolare K00.2
• Twinning, teeth K00.2