Specific code 2014 ICD-9-CM Diagnosis Code 520.4
Disturbances of tooth formation
  • Billable Code
  • Short description: Tooth formation disturb.
  • ICD-9-CM 520.4 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 520.4 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Abnl tooth formation
  • Disturbance of tooth formation
  • Tooth formation, abnormal
520.4 Excludes
  • Hutchinson's teeth and mulberry molars in congenital syphilis (090.5)
  • mottled teeth (520.3)
Applies To
  • Aplasia and hypoplasia of cementum
  • Dilaceration of tooth
  • Enamel hypoplasia (neonatal) (postnatal) (prenatal)
  • Horner's teeth
  • Hypocalcification of teeth
  • Regional odontodysplasia
  • Turner's tooth
Convert to ICD-10-CM: 520.4 converts directly to:
  • 2014 ICD-10-CM K00.4 Disturbances in tooth formation
ICD-9-CM Volume 2 Index entries containing back-references to 520.4:
  • Absence (organ or part) (complete or partial)
    • cementum 520.4
  • Amelogenesis imperfecta 520.5
    • nonhereditaria (segmentalis) 520.4
  • Aplasia - see also Agenesis
    • cementum 520.4
  • Calcification
    • dentinal papilla 520.4
  • Dilaceration, tooth 520.4
  • Disturbance - see also Disease
    • tooth
      • eruption 520.6
      • formation 520.4
      • structure, hereditary NEC 520.5
  • Ghost
    • teeth 520.4
  • Horner's
    • teeth 520.4
  • Hypocalcification, teeth 520.4
  • Hypoplasia, hypoplasis 759.89
    • cementum 520.4
    • enamel of teeth (neonatal) (postnatal) (prenatal) 520.4
    • Turner's (tooth) 520.4
  • Odontodysplasia, regional 520.4
  • Pitted - see also Pitting
    • teeth 520.4
  • Turner's
    • hypoplasia (tooth) 520.4
    • tooth 520.4
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 520.4 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.