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ICD-10 Guide
ICD-10 CodesF51.8

F51.8

Billable

Other sleep disorders not due to a substance or known physiological condition

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

Code Description

ICD-10 F51.8 is a billable code used to indicate a diagnosis of other sleep disorders not due to a substance or known physiological condition.

Key Diagnostic Point:

F51.8 encompasses a variety of sleep disorders that do not stem from substance use or identifiable physiological conditions. These disorders can manifest as difficulties in initiating or maintaining sleep, excessive daytime sleepiness, or abnormal sleep behaviors. Common examples include idiopathic hypersomnia, sleep-related movement disorders, and non-rapid eye movement sleep arousal disorders. Patients may experience significant distress or impairment in social, occupational, or other important areas of functioning. The etiology of these disorders is often multifactorial, involving psychological, environmental, and behavioral components. Treatment approaches may include cognitive-behavioral therapy, lifestyle modifications, and pharmacotherapy, depending on the specific disorder and its severity. Accurate diagnosis and coding are crucial for effective treatment and management, as well as for appropriate reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of symptoms that can overlap with other disorders
  • Need for comprehensive patient history to rule out other conditions
  • Potential for misdiagnosis due to symptom similarity with other sleep disorders
  • Documentation must clearly indicate the absence of substance use or physiological causes

Audit Risk Factors

  • Inadequate documentation of symptoms and their duration
  • Failure to rule out substance use or physiological conditions
  • Lack of clear treatment plans or follow-up documentation
  • Misalignment between diagnosis and treatment provided

Specialty Focus

Medical Specialties

Sleep Medicine

Documentation Requirements

Detailed sleep history, including sleep patterns, duration, and quality; results from sleep studies if applicable.

Common Clinical Scenarios

Patients presenting with chronic insomnia, excessive daytime sleepiness, or unusual sleep behaviors.

Billing Considerations

Consideration of comorbid conditions such as anxiety or depression that may influence sleep patterns.

Psychiatry

Documentation Requirements

Comprehensive mental health evaluation, including assessment of sleep-related symptoms and their impact on daily functioning.

Common Clinical Scenarios

Patients with mood disorders presenting with sleep disturbances.

Billing Considerations

Need to differentiate between primary sleep disorders and sleep disturbances secondary to psychiatric conditions.

Coding Guidelines

Inclusion Criteria

Use F51.8 When
  • According to ICD
  • 10 guidelines, F51
  • 8 should be used when sleep disorders are present without evidence of substance use or known physiological conditions
  • Coders must ensure that documentation supports the diagnosis and that other potential causes have been ruled out

Exclusion Criteria

Do NOT use F51.8 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

95806CPT Code

Polysomnography, sleep study

Clinical Scenario

When a sleep study is performed to evaluate sleep disorders.

Documentation Requirements

Results of the sleep study must be documented, along with the clinical rationale for the study.

Specialty Considerations

Sleep specialists should ensure that the study results are clearly linked to the diagnosis.

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, enabling better tracking of these conditions and their treatment outcomes. F51.8 provides a distinct classification for sleep disorders that do not fit into other categories, improving the accuracy of patient records and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of sleep disorders, enabling better tracking of these conditions and their treatment outcomes. F51.8 provides a distinct classification for sleep disorders that do not fit into other categories, improving the accuracy of patient records and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What are the common symptoms associated with F51.8?

Common symptoms include difficulty falling asleep, frequent awakenings during the night, excessive daytime sleepiness, and abnormal sleep behaviors such as sleepwalking or night terrors.