G99.0 — Autonomic neuropathy in diseases classified elsewhere
G99.0 is a billable, specific ICD-10-CM code for autonomic neuropathy in diseases classified elsewhere. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Code first
The underlying condition must be sequenced before this code.
Risk adjustment
G99.0 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
G99.0 is named in 9 Medicare coverage policies — 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52996Billing and Coding: Routine Foot Care
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56612Billing and Coding: CT of the Head
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
Related codes at this level
Codes that share G99. If G99.0 is not quite right, the correct code is usually one of these.
Questions about G99.0
- Is G99.0 a billable ICD-10-CM code?
- Yes. G99.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G99.0 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).
- What cannot be coded together with G99.0?
- G99.0 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.