2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Oral Cavity, Salivary Glands, And Jaws 520-529 > Diseases Of Pulp And Periapical Tissues 522.* > 2006 ICD-9-CM Diagnosis 522.1 Necrosis of the pulp View the most recent version of ICD-9-CM 522.1 Death of pulp tissue. When the necrosis is due to ischemia with superimposed bacterial infection, it is referred to as pulp gangrene. 522.1 is a specific code that can be used to specify a diagnosis 522.1 contains 5 index entries View the ICD-9-CM Volume 1 522.* hierarchy Alternate Terminology Pulp gangrene  Index entries containing 522.1: Gangrene, gangrenous (anemia) (artery) (cellulitis) (dermatitis) (dry) (infective) (moist) (pemphigus) (septic) (skin) (stasis) (ulcer) 785.4 pulp, tooth 522.1 tooth (pulp) 522.1 Necrosis, necrotic dental 521.09 pulp 522.1 pulp (dental) 522.1 Putrescent pulp (dental) 522.1