ICD-9-CM diagnosis code (retired)
528.01 — Mucositis (ulcerative) due to antineoplastic therapy
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 528.01
528.01 is an ICD-9-CM diagnosis code for mucositis (ulcerative) due to antineoplastic therapy. 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 K12.31 (Oral mucositis (ulcerative) due to antineoplastic therapy) and K12.33 (Oral mucositis (ulcerative) due to radiation). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 528.01
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.