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Home/Diagnosis/ICD-10 Coding for Lennox-Gastaut Syndrome

ICD-10 Coding for Lennox-Gastaut Syndrome

G40.811
G40.812
G40.813

Complete ICD-10-CM coding and documentation guide for icd-10 coding for lennox-gastaut syndrome includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
LGS
Epileptic Encephalopathy with Multiple Seizure Types
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Key Information: ICD-10 Coding for Lennox-Gastaut Syndrome

Essential facts and insights about ICD-10 Coding for Lennox-Gastaut Syndrome

Use ICD-10 code G40.811 for lennox-gastaut syndrome, not intractable, with status epilepticus, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Lennox-Gastaut syndrome, not intractable, with status epilepticus

Billable Code
G40.811
Billable

Diagnostic Criteria

  • • EEG confirms slow spike-wave (1.5-2.5 Hz) and generalized paroxysmal fast activity
  • • Status epilepticus duration ≥5 mins documented

Applicable To

  • • Lennox-Gastaut syndrome with status epilepticus

Important Notes

  • • Ensure EEG and status epilepticus documentation are present.

Lennox-Gastaut syndrome, not intractable, without status epilepticus

Billable Code
G40.812
Billable

Diagnostic Criteria

  • • ≥2 seizure types documented (e.g., tonic and atonic)
  • • No failure of ≥2 ASMs at therapeutic doses

Applicable To

  • • Lennox-Gastaut syndrome without status epilepticus

Important Notes

  • • Ensure documentation of seizure types and absence of ASM failures.

Lennox-Gastaut syndrome, intractable, with status epilepticus

Billable Code
G40.813
Billable

Diagnostic Criteria

  • • Documented failure of ≥2 ASMs
  • • Status epilepticus requiring ICU intervention

Applicable To

  • • Intractable Lennox-Gastaut syndrome with status epilepticus

Important Notes

  • • Ensure documentation of ASM failures and ICU intervention for status epilepticus.

Lennox-Gastaut syndrome, intractable, without status epilepticus

Billable Code
G40.814
Billable

Diagnostic Criteria

  • • ≥3 ASM failures with dosage/duration specifics
  • • Video EEG showing ≥3 seizure types

Applicable To

  • • Intractable Lennox-Gastaut syndrome without status epilepticus

Important Notes

  • • Ensure documentation of ASM failures and seizure types.
Ancillary Codes

Additional codes that may be used with this diagnosis

R56.1

Post-traumatic seizures

Use if head trauma precedes LGS diagnosis.

F71

Moderate intellectual disabilities

Use if intellectual disability is confirmed by neuropsych testing.

Z00.6

Encounter for psychiatric assessment

Use for behavioral comorbidities.

F72

Severe intellectual disabilities

Use if severe intellectual disability is confirmed by neuropsych testing.

Frequently Asked Questions

What is the ICD-10 code for Lennox-Gastaut Syndrome?

The ICD-10 codes for Lennox-Gastaut Syndrome range from G40.811 to G40.814, depending on intractability and presence of status epilepticus.

How is Lennox-Gastaut Syndrome documented?

Documentation must include EEG findings, seizure types, and treatment history, especially ASM failures for intractable cases.

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