Specific code 2015 ICD-9-CM Diagnosis Code 521.6
Ankylosis of teeth
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 521.6 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 521.6 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 521.6 converts directly to:
  • 2015/16 ICD-10-CM K03.5 Ankylosis of teeth
Approximate Synonyms
  • Ankylosis of tooth
Clinical Information
  • Solid fixation of a tooth resulting from fusion of the cementum and alveolar bone, with obliteration of the periodontal ligament. It is uncommon in the deciduous dentition and very rare in permanent teeth. (jablonski's dictionary of dentistry, 1992)
ICD-9-CM Volume 2 Index entries containing back-references to 521.6:
  • Ankylosis (fibrous) (osseous) 718.50
    • dental 521.6
    • teeth, tooth (hard tissues) 521.6
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 521.6 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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.