Home > 2015 ICD-9-CM Diagnosis Codes > Diseases Of The Digestive System 520-579 > Diseases Of Oral Cavity, Salivary Glands, And Jaws 520-529 > Diseases of hard tissues of teeth 521-
Specific code 2015 ICD-9-CM Diagnosis Code 521.00
Dental caries, unspecified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 521.00 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 521.00 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: 521.00 converts approximately to:
  • 2015/16 ICD-10-CM K02.9 Dental caries, unspecified
Approximate Synonyms
  • Dental caries
  • Dental caries due to radiation
  • Radiation induced dental caries
Clinical Information
  • Localized destruction of calcified tissue initiated on the tooth surface by decalcification of the enamel of the teeth, followed by enzymatic lysis of organic structures, leading to cavity formation that, if left untreated penetrates the enamel and dentin and may reach the pulp
  • The decay of a tooth, in which it becomes softened, discolored, and/or porous
ICD-9-CM Volume 2 Index entries containing back-references to 521.00:
  • Caries (bone) (see also Tuberculosis, bone) 015.9 [730.8]
    • teeth (internal) 521.00
  • Carious teeth 521.00
  • Cavity
    • teeth 521.00
  • Decay
    • dental 521.00
    • tooth, teeth 521.00
 521.0 ICD9Data.com 521.01 
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 521.00 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.
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