522.4
Acute apical periodontitis of pulpal origin
The ICD-9 code for acute apical periodontitis of pulpal origin is 522.4.
Legacy code — retired October 1, 2015ICD-10-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents.
View ICD-9 → ICD-10 crosswalk for 522.4 →