ICD-9-CM procedure code (retired)
33.31 — Destruction of phrenic nerve for collapse of lung
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 33.31
33.31 is an ICD-9-CM procedure code for destruction of phrenic nerve for collapse of lung. 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 3 ICD-10-PCS codes, such as 01520ZZ (Destruction of Phrenic Nerve, Open Approach), 01523ZZ (Destruction of Phrenic Nerve, Percutaneous Approach) and 01524ZZ (Destruction of Phrenic Nerve, Percutaneous Endoscopic Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 33.31
What is the ICD-10 code for ICD-9 33.31?
- The GEMs map 33.31 to ICD-10-PCS 01520ZZ, 01523ZZ and 01524ZZ.
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.