Is G90.3 a billable ICD-10-CM code?

Yes. G90.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G90.3 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 G90.3?

G90.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G90.3

G90.3 — Multi-system degeneration of the autonomic nervous system

Billable / specific codeICD-10-CM

G90.3 is a billable, specific ICD-10-CM code for multi-system degeneration of the autonomic nervous system. 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.

orthostatic hypotension NOS (I95.1)

Inclusion terms

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

Neurogenic orthostatic hypotension [Shy-Drager]

Other codes that can never be billed with G90.3

These codes carry an Excludes1 note pointing at G90.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G90.3 alone.

R03.1Nonspecific low blood-pressure reading
R55Syncope and collapse
G21Secondary parkinsonism
I95.1Orthostatic hypotension

Risk adjustment

G90.3 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 199 Parkinson and Other Degenerative Disease of Basal Ganglia0.615 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

G90.3 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.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A54954Billing and Coding: Autonomic Function Tests
A56612Billing and Coding: CT of the Head
A56619Billing and Coding: Nerve Conduction Studies and Electromyography

How G90.3 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 G90.3.

Shy-Drager syndrome
Degeneration, degenerative›multi-system
Hypotension›neurogenic, orthostatic
Parkinsonism›with neurogenic orthostatic hypotension(symptomatic)
Hypotension›orthostatic›neurogenic

Related codes at this level

Codes that share G90. If G90.3 is not quite right, the correct code is usually one of these.

Questions about G90.3

Is G90.3 a billable ICD-10-CM code?: Yes. G90.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G90.3 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 G90.3?: G90.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.