Skip to content
Dx

ICD-9-CM procedure code (retired)

40.42 — Radical neck dissection, bilateral

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-PCS equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 40.42

40.42 is an ICD-9-CM procedure code for radical neck dissection, bilateral. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.

The CMS General Equivalence Mappings translate it to 4 ICD-10-PCS codes, such as 07T10ZZ (Resection of Right Neck Lymphatic, Open Approach), 07T14ZZ (Resection of Right Neck Lymphatic, Percutaneous Endoscopic Approach) and 07T20ZZ (Resection of Left Neck Lymphatic, Open Approach). All of these are approximate matches, so review the record to pick the right one. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.

ICD-10-PCS equivalents

Common questions about 40.42

What is the ICD-10 code for ICD-9 40.42?

The GEMs map 40.42 to ICD-10-PCS 07T10ZZ, 07T14ZZ, 07T20ZZ and 07T24ZZ.

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.