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v1.0.0
ICD-10 Guide
DiagnosesInfantile Spasms

Infantile Spasms

ICD-10 Coding for Infantile Spasms(G40.822, G40.823)

PRIMARY SPECIALTYNeurology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Infantile Spasms?
Essential facts and insights about Infantile Spasms

Key Clinical Considerations:

  • Sudden, brief muscle contractions (spasms) typically occurring in clusters
  • Electroencephalogram (EEG) showing hypsarrhythmia or other characteristic patterns
  • Developmental regression or stagnation noted in the infant's growth

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including onset and frequency of spasms
  • Results of EEG and any neuroimaging studies
  • Detailed description of physical exam findings, including neurological assessment

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for differentiating between types of seizures.
  • Common errors include misclassifying infantile spasms as other seizure types.

Code Exclusions

Important Exclusions

  • Other seizure disorders such as generalized tonic-clonic seizures
  • Alternative codes for developmental delays not related to spasms

Related ICD-10 Codes

Primary Codes
G40.841
Infantile spasms
Ancillary Codes
P07.3
P55.0
Differential Codes
G40.909
G40.822
for specific infantile spasms, not general epilepsy.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Neurology

Specialty Applications

  • Infants typically aged 3 to 12 months
  • Neurology clinics, pediatric emergency departments, and outpatient settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Document the frequency, duration, and characteristics of spasms, along with EEG findings.

What are the billing considerations?

Ensure accurate coding based on the specific type of seizures and associated conditions.