ICD-9-CM diagnosis code (retired)
521.07 — Dental caries of smooth surface
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 521.07
521.07 is an ICD-9-CM diagnosis code for dental caries of smooth surface. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to 3 ICD-10-CM codes, such as K02.61 (Dental caries on smooth surface limited to enamel), K02.62 (Dental caries on smooth surface penetrating into dentin) and K02.63 (Dental caries on smooth surface penetrating into pulp). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 521.07
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.