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ICD-10 Guide
ICD-10 CodesF51.3

F51.3

Billable

Sleepwalking [somnambulism]

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 F51.3 is a billable code used to indicate a diagnosis of sleepwalking [somnambulism].

Key Diagnostic Point:

Sleepwalking, or somnambulism, is a disorder characterized by complex behaviors that occur during sleep, typically during the non-REM sleep stages. Individuals may walk, talk, or perform other activities while remaining largely unaware of their actions. This condition is most prevalent in children but can persist into adulthood. The episodes can last from a few seconds to several minutes, and the individual may not recall the event upon waking. Sleepwalking can be triggered by various factors, including sleep deprivation, stress, fever, and certain medications. It is important to differentiate sleepwalking from other sleep disorders, such as night terrors or REM sleep behavior disorder, as the management and implications for safety can differ significantly. The condition can lead to potential injuries if the individual engages in unsafe behaviors while sleepwalking. Treatment may involve lifestyle changes, improving sleep hygiene, and in some cases, medication. Understanding the underlying causes and triggers is essential for effective management and prevention of episodes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other sleep disorders
  • Variability in presentation and triggers
  • Potential for co-occurring conditions
  • Need for comprehensive patient history

Audit Risk Factors

  • Inadequate documentation of episodes
  • Failure to note co-existing conditions
  • Lack of patient history regarding sleep patterns
  • Insufficient detail on safety concerns

Specialty Focus

Medical Specialties

Sleep Medicine

Documentation Requirements

Detailed sleep history, including frequency and duration of episodes, triggers, and any associated injuries.

Common Clinical Scenarios

Patients presenting with recurrent sleepwalking episodes, often reported by family members.

Billing Considerations

Consideration of polysomnography results to rule out other sleep disorders.

Psychiatry

Documentation Requirements

Assessment of psychological factors contributing to sleepwalking, including stress and anxiety levels.

Common Clinical Scenarios

Patients with a history of anxiety or stress presenting with sleepwalking episodes.

Billing Considerations

Evaluation of any psychiatric medications that may influence sleep patterns.

Coding Guidelines

Inclusion Criteria

Use F51.3 When
  • According to ICD
  • 10 coding guidelines, F51
  • 3 should be used when sleepwalking is the primary diagnosis
  • It is essential to document the frequency and nature of episodes, as well as any associated injuries or safety concerns

Exclusion Criteria

Do NOT use F51.3 When
  • Exclusion criteria include other sleep disorders that may present similarly

Related ICD-10 Codes

Related CPT Codes

95810CPT Code

Polysomnography, sleep study

Clinical Scenario

Used when evaluating patients with sleepwalking for other sleep disorders.

Documentation Requirements

Document the reason for the sleep study and any prior sleep history.

Specialty Considerations

Sleep specialists should ensure comprehensive evaluation of sleep patterns.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of sleep disorders, including sleepwalking, improving the accuracy of diagnoses and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of sleep disorders, including sleepwalking, improving the accuracy of diagnoses and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of sleep disorders, including sleepwalking, improving the accuracy of diagnoses and treatment plans.

Resources

Clinical References

  • •
    American Academy of Sleep Medicine

Coding & Billing References

  • •
    American Academy of Sleep Medicine

Frequently Asked Questions

What are the common triggers for sleepwalking?

Common triggers include sleep deprivation, stress, fever, and certain medications. Identifying these triggers is crucial for effective management.