ICD-9-CM procedure code (retired)
20.49 — Other 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 20.49
20.49 is an ICD-9-CM procedure code for other 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 22 ICD-10-PCS codes, such as 095B0ZZ (Destruction of Right Mastoid Sinus, Open Approach), 095B3ZZ (Destruction of Right Mastoid Sinus, Percutaneous Approach) and 095B4ZZ (Destruction of 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
- 095B0ZZDestruction of Right Mastoid Sinus, Open Approachapproximate
- 095B3ZZDestruction of Right Mastoid Sinus, Percutaneous Approachapproximate
- 095B4ZZDestruction of Right Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 095B8ZZDestruction of Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
- 095C0ZZDestruction of Left Mastoid Sinus, Open Approachapproximate
- 095C3ZZDestruction of Left Mastoid Sinus, Percutaneous Approachapproximate
- 095C4ZZDestruction of Left Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 095C8ZZDestruction of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
- 09BB0ZZExcision of Right Mastoid Sinus, Open Approachapproximate
- 09BB3ZZExcision of Right Mastoid Sinus, Percutaneous Approachapproximate
- 09BB4ZZExcision of Right Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 09BB8ZZExcision of Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
- 09BC0ZZExcision of Left Mastoid Sinus, Open Approachapproximate
- 09BC3ZZExcision of Left Mastoid Sinus, Percutaneous Approachapproximate
- 09BC4ZZExcision of Left Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 09BC8ZZExcision of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopicapproximate
- 09DB0ZZExtraction of Right Mastoid Sinus, Open Approachapproximate
- 09DB3ZZExtraction of Right Mastoid Sinus, Percutaneous Approachapproximate
- 09DB4ZZExtraction of Right Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
- 09DC0ZZExtraction of Left Mastoid Sinus, Open Approachapproximate
- 09DC3ZZExtraction of Left Mastoid Sinus, Percutaneous Approachapproximate
- 09DC4ZZExtraction of Left Mastoid Sinus, Percutaneous Endoscopic Approachapproximate
Common questions about 20.49
What is the ICD-10 code for ICD-9 20.49?
- The GEMs map 20.49 to ICD-10-PCS 095B0ZZ, 095B3ZZ, 095B4ZZ, 095B8ZZ, 095C0ZZ, 095C3ZZ and 16 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.