2013 ICD-9-CM Diagnosis Code 521.0
- 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.
- There are 10 ICD-9-CM codes below 521.0 that define this diagnosis in greater detail. Do not use this code on a reimbursement claim.