Is G04.90 a billable code?
Yes. G04.90 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
G04.90: Encephalitis and encephalomyelitis, unspecified
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
G04.90 is a billable ICD-10-CM diagnosis code for encephalitis and encephalomyelitis, unspecified. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with G04.90 already added.Good Faith EstimateStart a cost estimate with G04.90 already added.CMS-1500 Claim FormFill a claim form with G04.90 in box 21.
Other codes in G04.9 Encephalitis, myelitis and encephalomyelitis, unspecified
G04.90 questions
What does G04.90 mean?
G04.90 is the ICD-10-CM code for Encephalitis and encephalomyelitis, unspecified. It is in chapter 6, Diseases of the nervous system (G00-G99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.