G13.8 — Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
G13.8 is a billable, specific ICD-10-CM code for systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere. It is valid for submission on a claim.
Code first
The underlying condition must be sequenced before this code.
- underlying disease
Risk adjustment
G13.8 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
G13.8 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57780Billing and Coding: Psychological and Neuropsychological Tests
How G13.8 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 G13.8.
- Atrophy, atrophic›systemic affecting central nervous system›in›specified disease NEC
Related codes at this level
Codes that share G13. If G13.8 is not quite right, the correct code is usually one of these.
Questions about G13.8
- Is G13.8 a billable ICD-10-CM code?
- Yes. G13.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G13.8 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Systemic atrophies primarily affecting the central nervous system (G10-G14).