ICD-9-CM diagnosis code (retired)
522.9 — Other and unspecified diseases of pulp and periapical tissues
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 522.9
522.9 is an ICD-9-CM diagnosis code for other and unspecified diseases of pulp and periapical tissues. 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 2 ICD-10-CM codes, such as K04.90 (Unspecified diseases of pulp and periapical tissues) and K04.99 (Other diseases of pulp and periapical tissues). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 522.9
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.