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ICD-10 Guide
ICD-10 CodesF31.8

F31.8

Billable

Other bipolar disorders

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

Code Description

ICD-10 F31.8 is a billable code used to indicate a diagnosis of other bipolar disorders.

Key Diagnostic Point:

F31.8 encompasses various forms of bipolar disorder that do not fit neatly into the more commonly recognized categories of bipolar I or bipolar II disorders. These may include atypical presentations of mood episodes, such as those characterized by rapid cycling or mixed features that do not meet the full criteria for the established bipolar disorders. Patients may experience significant mood swings, including episodes of mania, hypomania, and depression, which can severely impact their daily functioning and quality of life. The diagnosis requires a thorough clinical assessment, including a detailed history of mood episodes, family history of mood disorders, and a comprehensive evaluation of the patient's psychosocial environment. Treatment typically involves mood stabilizers, antipsychotics, and psychotherapy, with careful monitoring for suicide risk, as individuals with bipolar disorder are at an increased risk for suicidal ideation and attempts. Accurate diagnosis and management are crucial to mitigate the risks associated with this complex disorder.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of presentations that may not fit standard criteria
  • Need for comprehensive patient history and assessment
  • Potential overlap with other mood disorders
  • Variability in treatment approaches and response

Audit Risk Factors

  • Inadequate documentation of mood episodes
  • Failure to assess and document suicide risk
  • Misclassification of bipolar disorder types
  • Lack of comprehensive treatment plans

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed patient history, mood episode documentation, treatment plans, and suicide risk assessments.

Common Clinical Scenarios

Patients presenting with mood instability, rapid cycling, or atypical depressive symptoms.

Billing Considerations

Ensure thorough documentation of all mood episodes and treatment responses to support the diagnosis.

Primary Care

Documentation Requirements

Documentation of mental health screenings, referrals to psychiatry, and ongoing management plans.

Common Clinical Scenarios

Patients with undiagnosed mood disorders presenting with physical complaints or vague symptoms.

Billing Considerations

Collaboration with mental health specialists for accurate diagnosis and treatment.

Coding Guidelines

Inclusion Criteria

Use F31.8 When
  • Follow the ICD
  • CM guidelines for mood disorders, ensuring that the diagnosis is supported by clinical documentation
  • Include details of mood episodes, treatment history, and any co
  • occurring conditions

Exclusion Criteria

Do NOT use F31.8 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

90834CPT Code

Psychotherapy, 45 minutes with patient

Clinical Scenario

Used for ongoing management of bipolar disorder symptoms.

Documentation Requirements

Document the nature of the therapy, patient progress, and treatment goals.

Specialty Considerations

Psychiatrists should ensure that therapy sessions are well-documented to support 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 bipolar disorders, including the ability to capture atypical presentations under F31.8, which enhances the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of bipolar disorders, including the ability to capture atypical presentations under F31.8, which enhances the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of bipolar disorders, including the ability to capture atypical presentations under F31.8, which enhances the accuracy of patient records and treatment plans.

Resources

Clinical References

  • •
    American Psychiatric Association - Diagnostic and Statistical Manual of Mental Disorders

Coding & Billing References

  • •
    American Psychiatric Association - Diagnostic and Statistical Manual of Mental Disorders

Frequently Asked Questions

What distinguishes F31.8 from other bipolar disorder codes?

F31.8 is used for bipolar disorders that do not fit the criteria for bipolar I or II, often involving atypical presentations or mixed features.