ICD-9-CM diagnosis code (retired)
146.2 — Malignant neoplasm of tonsillar pillars (anterior) (posterior)
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 146.2
146.2 is an ICD-9-CM diagnosis code for malignant neoplasm of tonsillar pillars (anterior) (posterior). 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 one ICD-10-CM code, C09.1 (Malignant neoplasm of tonsillar pillar (anterior) (posterior)). The match is exact.
ICD-10-CM equivalents
- C09.1Malignant neoplasm of tonsillar pillar (anterior) (posterior)exact match
Common questions about 146.2
What is the ICD-10 code for ICD-9 146.2?
- The GEMs map 146.2 to ICD-10-CM C09.1.
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.