ICD-9-CM procedure code (retired)
04.49 — Other peripheral nerve or ganglion decompression or lysis of adhesions
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 04.49
04.49 is an ICD-9-CM procedure code for other peripheral nerve or ganglion decompression or lysis of adhesions. 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 48 ICD-10-PCS codes, such as 01N00ZZ (Release Cervical Plexus, Open Approach), 01N03ZZ (Release Cervical Plexus, Percutaneous Approach) and 01N04ZZ (Release Cervical Plexus, Percutaneous Endoscopic Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 01N00ZZRelease Cervical Plexus, Open Approachapproximate
- 01N03ZZRelease Cervical Plexus, Percutaneous Approachapproximate
- 01N04ZZRelease Cervical Plexus, Percutaneous Endoscopic Approachapproximate
- 01N10ZZRelease Cervical Nerve, Open Approachapproximate
- 01N13ZZRelease Cervical Nerve, Percutaneous Approachapproximate
- 01N14ZZRelease Cervical Nerve, Percutaneous Endoscopic Approachapproximate
- 01N20ZZRelease Phrenic Nerve, Open Approachapproximate
- 01N23ZZRelease Phrenic Nerve, Percutaneous Approachapproximate
- 01N24ZZRelease Phrenic Nerve, Percutaneous Endoscopic Approachapproximate
- 01N30ZZRelease Brachial Plexus, Open Approachapproximate
- 01N33ZZRelease Brachial Plexus, Percutaneous Approachapproximate
- 01N34ZZRelease Brachial Plexus, Percutaneous Endoscopic Approachapproximate
- 01N40ZZRelease Ulnar Nerve, Open Approachapproximate
- 01N43ZZRelease Ulnar Nerve, Percutaneous Approachapproximate
- 01N44ZZRelease Ulnar Nerve, Percutaneous Endoscopic Approachapproximate
- 01N60ZZRelease Radial Nerve, Open Approachapproximate
- 01N63ZZRelease Radial Nerve, Percutaneous Approachapproximate
- 01N64ZZRelease Radial Nerve, Percutaneous Endoscopic Approachapproximate
- 01N80ZZRelease Thoracic Nerve, Open Approachapproximate
- 01N83ZZRelease Thoracic Nerve, Percutaneous Approachapproximate
- 01N84ZZRelease Thoracic Nerve, Percutaneous Endoscopic Approachapproximate
- 01N90ZZRelease Lumbar Plexus, Open Approachapproximate
- 01N93ZZRelease Lumbar Plexus, Percutaneous Approachapproximate
- 01N94ZZRelease Lumbar Plexus, Percutaneous Endoscopic Approachapproximate
- 01NA0ZZRelease Lumbosacral Plexus, Open Approachapproximate
- 01NA3ZZRelease Lumbosacral Plexus, Percutaneous Approachapproximate
- 01NA4ZZRelease Lumbosacral Plexus, Percutaneous Endoscopic Approachapproximate
- 01NB0ZZRelease Lumbar Nerve, Open Approachapproximate
- 01NB3ZZRelease Lumbar Nerve, Percutaneous Approachapproximate
- 01NB4ZZRelease Lumbar Nerve, Percutaneous Endoscopic Approachapproximate
- 01NC0ZZRelease Pudendal Nerve, Open Approachapproximate
- 01NC3ZZRelease Pudendal Nerve, Percutaneous Approachapproximate
- 01NC4ZZRelease Pudendal Nerve, Percutaneous Endoscopic Approachapproximate
- 01ND0ZZRelease Femoral Nerve, Open Approachapproximate
- 01ND3ZZRelease Femoral Nerve, Percutaneous Approachapproximate
- 01ND4ZZRelease Femoral Nerve, Percutaneous Endoscopic Approachapproximate
- 01NF0ZZRelease Sciatic Nerve, Open Approachapproximate
- 01NF3ZZRelease Sciatic Nerve, Percutaneous Approachapproximate
- 01NF4ZZRelease Sciatic Nerve, Percutaneous Endoscopic Approachapproximate
- 01NH0ZZRelease Peroneal Nerve, Open Approachapproximate
- 01NH3ZZRelease Peroneal Nerve, Percutaneous Approachapproximate
- 01NH4ZZRelease Peroneal Nerve, Percutaneous Endoscopic Approachapproximate
- 01NQ0ZZRelease Sacral Plexus, Open Approachapproximate
- 01NQ3ZZRelease Sacral Plexus, Percutaneous Approachapproximate
- 01NQ4ZZRelease Sacral Plexus, Percutaneous Endoscopic Approachapproximate
- 01NR0ZZRelease Sacral Nerve, Open Approachapproximate
- 01NR3ZZRelease Sacral Nerve, Percutaneous Approachapproximate
- 01NR4ZZRelease Sacral Nerve, Percutaneous Endoscopic Approachapproximate
Common questions about 04.49
What is the ICD-10 code for ICD-9 04.49?
- The GEMs map 04.49 to ICD-10-PCS 01N00ZZ, 01N03ZZ, 01N04ZZ, 01N10ZZ, 01N13ZZ, 01N14ZZ and 42 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.