G40.90 ICD-10-CM Code: Epilepsy, unspecified, not intractable
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
G40.90Epilepsy, unspecified, not intractable
ICD-10-CM diagnosis code · United States clinical modification
Where G40.90 sits
- 1
Chapter 6
Diseases of the nervous system (G00-G99)
- 2
Section
Episodic and paroxysmal disorders (G40-G47)
- 3
Category G40
Epilepsy and recurrent seizures
- 4
Subcategory G40.9
Epilepsy, unspecified
- 5
Code G40.90
Epilepsy, unspecified, not intractable
Codes under G40.90
G40.90 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
- Epilepsy, unspecified, without intractability
Code first
No “code first” instruction is listed for G40.90.
Use additional code
No “use additional code” instruction is listed for G40.90.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for G40.90.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for G40.90.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code G40.90 mean?
G40.90 is the FY 2027 U.S. ICD-10-CM code for “Epilepsy, unspecified, not intractable.”
Is G40.90 a billable or specific ICD-10-CM code?
No. G40.90 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is G40.90 located in ICD-10-CM?
G40.90 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Episodic and paroxysmal disorders (G40-G47) (G40–G47), under category G40, Epilepsy and recurrent seizures and subcategory G40.9, Epilepsy, unspecified.
What coding notes are listed for G40.90?
Its listed inclusion terms are Epilepsy, unspecified, without intractability. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.