Is G31.82 a billable ICD-10-CM code?

Yes. G31.82 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G31.82 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).

G31.82

G31.82 — Leigh's disease

Billable / specific codeICD-10-CM

G31.82 is a billable, specific ICD-10-CM code for leigh's disease. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Subacute necrotizing encephalopathy

Other codes that can never be billed with G31.82

These codes carry an Excludes1 note pointing at G31.82. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G31.82 alone.

E74.4Disorders of pyruvate metabolism and gluconeogenesis
E88.4Mitochondrial metabolism disorders
G71.3Mitochondrial myopathy, not elsewhere classified

Risk adjustment

G31.82 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 127 Dementia, Mild or Unspecified0.341 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

G31.82 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56612Billing and Coding: CT of the Head
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How G31.82 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 G31.82.

Leigh's disease
Encephalopathy›necrotizing, subacute(Leigh)

Related codes at this level

Codes that share G31.8. If G31.82 is not quite right, the correct code is usually one of these.

Questions about G31.82

Is G31.82 a billable ICD-10-CM code?: Yes. G31.82 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G31.82 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).