G40.89: Other seizures
G40.89 is a billable, specific ICD-10-CM code for other seizures. It is valid for submission on a claim.
Check G40.89 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Excludes1 inherited from the categories above G40.89
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above G40.89
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with G40.89
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
G40.89 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 201 Seizure Disorders and Convulsions0.245 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. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
G40.89 is named in 16 Medicare coverage policies: 16 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56551Billing and Coding: Visual Fields Testing
- A56612Billing and Coding: CT of the Head
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
- A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
Alphabetic index entries that lead here
- Seizure›specified NEC
Code history
Unchanged in every release from FY2024 to FY2027.