ICD-9-CM procedure code (retired)
18.12 — Biopsy of external 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 18.12
18.12 is an ICD-9-CM procedure code for biopsy of external 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 44 ICD-10-PCS codes, such as 09900ZX (Drainage of Right External Ear, Open Approach, Diagnostic), 09903ZX (Drainage of Right External Ear, Percutaneous Approach, Diagnostic) and 09904ZX (Drainage of Right External Ear, Percutaneous Endoscopic Approach, Diagnostic). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 09900ZXDrainage of Right External Ear, Open Approach, Diagnosticapproximate
- 09903ZXDrainage of Right External Ear, Percutaneous Approach, Diagnosticapproximate
- 09904ZXDrainage of Right External Ear, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 0990XZXDrainage of Right External Ear, External Approach, Diagnosticapproximate
- 09910ZXDrainage of Left External Ear, Open Approach, Diagnosticapproximate
- 09913ZXDrainage of Left External Ear, Percutaneous Approach, Diagnosticapproximate
- 09914ZXDrainage of Left External Ear, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 0991XZXDrainage of Left External Ear, External Approach, Diagnosticapproximate
- 09930ZXDrainage of Right External Auditory Canal, Open Approach, Diagnosticapproximate
- 09933ZXDrainage of Right External Auditory Canal, Percutaneous Approach, Diagnosticapproximate
- 09934ZXDrainage of Right External Auditory Canal, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09937ZXDrainage of Right External Auditory Canal, Via Natural or Artificial Opening, Diagnosticapproximate
- 09938ZXDrainage of Right External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnosticapproximate
- 0993XZXDrainage of Right External Auditory Canal, External Approach, Diagnosticapproximate
- 09940ZXDrainage of Left External Auditory Canal, Open Approach, Diagnosticapproximate
- 09943ZXDrainage of Left External Auditory Canal, Percutaneous Approach, Diagnosticapproximate
- 09944ZXDrainage of Left External Auditory Canal, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09947ZXDrainage of Left External Auditory Canal, Via Natural or Artificial Opening, Diagnosticapproximate
- 09948ZXDrainage of Left External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnosticapproximate
- 0994XZXDrainage of Left External Auditory Canal, External Approach, Diagnosticapproximate
- 09B00ZXExcision of Right External Ear, Open Approach, Diagnosticapproximate
- 09B03ZXExcision of Right External Ear, Percutaneous Approach, Diagnosticapproximate
- 09B04ZXExcision of Right External Ear, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09B0XZXExcision of Right External Ear, External Approach, Diagnosticapproximate
- 09B10ZXExcision of Left External Ear, Open Approach, Diagnosticapproximate
- 09B13ZXExcision of Left External Ear, Percutaneous Approach, Diagnosticapproximate
- 09B14ZXExcision of Left External Ear, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09B1XZXExcision of Left External Ear, External Approach, Diagnosticapproximate
- 09B30ZXExcision of Right External Auditory Canal, Open Approach, Diagnosticapproximate
- 09B33ZXExcision of Right External Auditory Canal, Percutaneous Approach, Diagnosticapproximate
- 09B34ZXExcision of Right External Auditory Canal, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09B37ZXExcision of Right External Auditory Canal, Via Natural or Artificial Opening, Diagnosticapproximate
- 09B38ZXExcision of Right External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnosticapproximate
- 09B3XZXExcision of Right External Auditory Canal, External Approach, Diagnosticapproximate
- 09B40ZXExcision of Left External Auditory Canal, Open Approach, Diagnosticapproximate
- 09B43ZXExcision of Left External Auditory Canal, Percutaneous Approach, Diagnosticapproximate
- 09B44ZXExcision of Left External Auditory Canal, Percutaneous Endoscopic Approach, Diagnosticapproximate
- 09B47ZXExcision of Left External Auditory Canal, Via Natural or Artificial Opening, Diagnosticapproximate
- 09B48ZXExcision of Left External Auditory Canal, Via Natural or Artificial Opening Endoscopic, Diagnosticapproximate
- 09B4XZXExcision of Left External Auditory Canal, External Approach, Diagnosticapproximate
- 0H92XZXDrainage of Right Ear Skin, External Approach, Diagnosticapproximate
- 0H93XZXDrainage of Left Ear Skin, External Approach, Diagnosticapproximate
- 0HB2XZXExcision of Right Ear Skin, External Approach, Diagnosticapproximate
- 0HB3XZXExcision of Left Ear Skin, External Approach, Diagnosticapproximate
Common questions about 18.12
What is the ICD-10 code for ICD-9 18.12?
- The GEMs map 18.12 to ICD-10-PCS 09900ZX, 09903ZX, 09904ZX, 0990XZX, 09910ZX, 09913ZX and 38 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.