ICD-9-CM procedure code (retired)
20.92 — Revision of mastoidectomy
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 20.92
20.92 is an ICD-9-CM procedure code for revision of mastoidectomy. 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 09QB0ZZ (Repair Right Mastoid Sinus, Open Approach), 09QB3ZZ (Repair Right Mastoid Sinus, Percutaneous Approach) and 09QB4ZZ (Repair Right Mastoid Sinus, Percutaneous Endoscopic Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 09QB0ZZRepair Right Mastoid Sinus, Open Approachapproximate
- 09QB3ZZRepair Right Mastoid Sinus, Percutaneous Approachapproximate
- 09QB4ZZRepair Right Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 09QB8ZZRepair Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
- 09QC0ZZRepair Left Mastoid Sinus, Open Approachapproximate
- 09QC3ZZRepair Left Mastoid Sinus, Percutaneous Approachapproximate
- 09QC4ZZRepair Left Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 09QC8ZZRepair Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
Common questions about 20.92
What is the ICD-10 code for ICD-9 20.92?
- The GEMs map 20.92 to ICD-10-PCS 09QB0ZZ, 09QB3ZZ, 09QB4ZZ, 09QB8ZZ, 09QC0ZZ, 09QC3ZZ 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.