K00.2 Abnormalities of size and form of teeth

The ICD-10-CM code for Abnormalities of size and form of teeth is K00.2 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

11: Diseases of the digestive system (K00-K95)

Section

K00-K14: Diseases of oral cavity and salivary glands (K00-K14)

Category K00

11 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K00.2:

• Concrescence (teeth)
• Enameloma
• Dens evaginatus, in dente or invaginatus
• Dichotomy, teeth
• Macrodontia
• Microdontia
• Gemination, tooth, teeth
• Enamel pearls

Inclusion Terms

• 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

U.S. Hospital Utilization

• An estimated 120 U.S. inpatient stays in 2023 included K00.2 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)