G54.9 — Nerve root and plexus disorder, unspecified
G54.9 is a billable, specific ICD-10-CM code for nerve root and plexus disorder, unspecified. It is valid for submission on a claim.
Risk adjustment
G54.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
G54.9 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53064Billing and Coding: Outpatient Occupational Therapy
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A55530Billing and Coding: Peripheral Nerve Stimulation
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
How G54.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G54.9.
- Disorder›plexus
- Compression›nerve›root or plexus NOS(in)
- Compression›spinal›nerve root NOS
- Disorder›nerve›root
Related codes at this level
Codes that share G54. If G54.9 is not quite right, the correct code is usually one of these.
- G54.0Brachial plexus disorders
- G54.1Lumbosacral plexus disorders
- G54.2Cervical root disorders, not elsewhere classified
- G54.3Thoracic root disorders, not elsewhere classified
- G54.4Lumbosacral root disorders, not elsewhere classified
- G54.5Neuralgic amyotrophy
- G54.6Phantom limb syndrome with pain
- G54.7Phantom limb syndrome without pain
- G54.8Other nerve root and plexus disorders
Questions about G54.9
- Is G54.9 a billable ICD-10-CM code?
- Yes. G54.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G54.9 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Nerve, nerve root and plexus disorders (G50-G59).