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Home/Diagnosis/ICD-10 Coding for New Onset Seizure

ICD-10 Coding for New Onset Seizure

R56.9
G40.909

Complete ICD-10-CM coding and documentation guide for icd-10 coding for new onset seizure includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
First Seizure
Initial Seizure Episode
Single seizure episode
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Key Information: ICD-10 Coding for New Onset Seizure

Essential facts and insights about ICD-10 Coding for New Onset Seizure

Use ICD-10 code R56.9 for unspecified convulsions, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Unspecified convulsions

Billable Code
R56.9
Billable

Diagnostic Criteria

clinical:
  • • First seizure with no prior history
documentation:
  • • Detailed description of seizure event and postictal state

Applicable To

  • • Convulsions NOS
  • • Seizure NOS

Important Notes

  • • Ensure documentation specifies 'first seizure' to avoid confusion with epilepsy codes.

Epilepsy, unspecified, not intractable, without status epilepticus

Billable Code
G40.909
Billable

Diagnostic Criteria

clinical:
  • • History of two or more unprovoked seizures
  • • EEG findings consistent with epilepsy

Applicable To

  • • Recurrent seizures

Important Notes

  • • Document seizure frequency and any treatment response.
Ancillary Codes

Additional codes that may be used with this diagnosis

95812

EEG monitoring

Use for routine EEG monitoring to support diagnosis.

70450

CT head without contrast

Use to rule out structural causes of seizures.

95951

Video EEG monitoring

Use for detailed monitoring to confirm epilepsy diagnosis.

Frequently Asked Questions

What is the ICD-10 code for a new onset seizure?

The ICD-10 code for a new onset seizure is R56.9, used for unspecified convulsions when no specific cause is identified.

How do you code a first-time seizure?

For a first-time seizure, use ICD-10 code R56.9, unless a specific cause is identified, in which case code the cause first.

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