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ICD-9-CM procedure code (retired)

20.23 — Incision of middle ear

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 20.23

20.23 is an ICD-9-CM procedure code for incision of middle ear. 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 8 ICD-10-PCS codes, such as 09C50ZZ (Extirpation of Matter from Right Middle Ear, Open Approach), 09C58ZZ (Extirpation of Matter from Right Middle Ear, Via Natural or Artificial Opening Endoscopic) and 09C60ZZ (Extirpation of Matter from Left Middle Ear, Open Approach). All of these are approximate matches, so review the record to pick the right one.

ICD-10-PCS equivalents

Common questions about 20.23

What is the ICD-10 code for ICD-9 20.23?

The GEMs map 20.23 to ICD-10-PCS 09C50ZZ, 09C58ZZ, 09C60ZZ, 09C68ZZ, 09N50ZZ, 09N58ZZ and 2 more.

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.