G92.9 — Unspecified toxic encephalopathy
G92.9 is a billable, specific ICD-10-CM code for unspecified toxic encephalopathy. It is valid for submission on a claim.
Code first
The underlying condition must be sequenced before this code.
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Risk adjustment
G92.9 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
G92.9 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57483Billing and Coding: Visual Fields
How G92.9 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 G92.9.
- Encephalopathy›toxic
- Myelitis›toxic
Related codes at this level
Codes that share G92. If G92.9 is not quite right, the correct code is usually one of these.
Questions about G92.9
- Is G92.9 a billable ICD-10-CM code?
- Yes. G92.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G92.9 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).