Specific code 2009 ICD-9-CM Diagnosis Code 521.6
Ankylosis of teeth
  • 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).
  • You are viewing the 2009 version of ICD-9-CM 521.6.
  • More recent version(s) of ICD-9-CM 521.6: 2010 2011 2012 2013 2014 2015.
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
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 2009 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.