Convert to ICD-10-CM:
478.22 converts approximately to:
- 2015/16 ICD-10-CM J39.0 Retropharyngeal and parapharyngeal abscess
ICD-9-CM Volume 2 Index entries containing back-references to
478.22:
- Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9

parapharyngeal 478.22