G90.2

G90.2: Horner's syndrome

Billable / specific codeICD-10-CM

G90.2 is a billable, specific ICD-10-CM code for horner's syndrome. It is valid for submission on a claim.

Check G90.2 with the rest of the claim: free scrubber

Inclusion terms

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

Bernard(-Horner) syndrome
Cervical sympathetic dystrophy or paralysis

Excludes1 inherited from the categories above G90.2

A category’s note binds every code beneath it.

Written on G90: Disorders of autonomic nervous system

dysfunction of the autonomic nervous system due to alcohol (G31.2)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

G90.2 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A53058Billing and Coding: Home Health Physical Therapy
A54969Billing and Coding: Nerve Conduction Studies and Electromyography
A56612Billing and Coding: CT of the Head
A56619Billing and Coding: Nerve Conduction Studies and Electromyography

Alphabetic index entries that lead here

Bernard-Horner syndrome
Claude Bernard-Horner syndrome
Horner syndrome(-Claude Bernard)
Dystrophy, dystrophia›cervical sympathetic
Syndrome›Horner's
Dystrophy, dystrophia›sympathetic›cervical
Syndrome›cervical›sympathetic paralysis
Syndrome›sympathetic›cervical paralysis

Code history

Unchanged in every release from FY2024 to FY2027.