K00.4 Disturbances in tooth formation

Billable ICD-10-CM code, FY2026.

Applicable to

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

Excludes1 (never code together)

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

Excludes2 (not included here)

• mottled teeth (K00.3)

Applies from K00 Disorders of tooth development and eruption

Excludes2 (not included here)

• embedded and impacted teeth (K01.-)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 520.4 Disturbances of tooth formation

Diagnosis Index entries for K00.4

• Amelogenesis imperfecta › nonhereditaria (segmentalis)
• Aplasia › cementum
• Calcification › dentinal papilla
• Dilaceration, tooth
• Disturbance (s) › tooth › formation
• Ghost › teeth
• Hypoplasia, hypoplastic › cementum
• Hypoplasia, hypoplastic › enamel of teeth (neonatal) (postnatal) (prenatal)
• Hypoplasia, hypoplastic › Turner's
• Odontodysplasia, regional
• Pitting › teeth
• Turner's › hypoplasia (tooth)
• Turner's › tooth

Nearby codes

• 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 (this code)
• 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