2021 ICD-10-CM Diagnosis Code K00.2

Abnormalities of size and form of teeth

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • K00.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM K00.2 became effective on October 1, 2020.
  • 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
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K00.2. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • abnormalities of teeth due to congenital syphilis (
    ICD-10-CM Diagnosis Code A50.5

    Other late congenital syphilis, symptomatic

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Any congenital syphilitic condition specified as late or manifest two years or more after birth.
    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
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K00.2:
  • K00-K95
    2021 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K00
    ICD-10-CM Diagnosis Code K00

    Disorders of tooth development and eruption

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • embedded and impacted teeth (K01.-)
    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 v38.0):
  • 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-CM

Code 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
Code annotations containing back-references to K00.2:
  • Type 2 Excludes: K00.1
    ICD-10-CM Diagnosis Code K00.1

    Supernumerary teeth

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Distomolar
    • Fourth molar
    • Mesiodens
    • Paramolar
    • Supplementary teeth
    Type 2 Excludes
    • supernumerary roots (K00.2)

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
    ICD-10-CM Diagnosis Code Q89.9

    Congenital malformation, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Congenital anomaly NOS
    • Congenital deformity NOS
    • form, teeth K00.2
  • Concrescence K00.2 (teeth)
  • Conical
    • teeth K00.2
  • Deformity Q89.9
    ICD-10-CM Diagnosis Code Q89.9

    Congenital malformation, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Congenital anomaly NOS
    • Congenital deformity NOS
    • 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

ICD-10-CM Codes Adjacent To K00.2
J98.5 Diseases of mediastinum, not elsewhere classified
J98.51 Mediastinitis
J98.59 Other diseases of mediastinum, not elsewhere classified
J98.6 Disorders of diaphragm
J98.8 Other specified respiratory disorders
J98.9 Respiratory disorder, unspecified
J99 Respiratory disorders in diseases classified elsewhere
K00 Disorders of tooth development and eruption
K00.0 Anodontia
K00.1 Supernumerary teeth
K00.2 Abnormalities of size and form of teeth
K00.3 Mottled teeth
K00.4 Disturbances in tooth formation
K00.5 Hereditary disturbances in tooth structure, not elsewhere classified
K00.6 Disturbances in tooth eruption
K00.7 Teething syndrome
K00.8 Other disorders of tooth development
K00.9 Disorder of tooth development, unspecified
K01 Embedded and impacted teeth
K01.0 Embedded teeth
K01.1 Impacted teeth

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.