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ICD-10 Guide
ICD-10 CodesF31.3

F31.3

Billable

Bipolar disorder, current episode depressed, mild or moderate severity

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

Code Description

ICD-10 F31.3 is a billable code used to indicate a diagnosis of bipolar disorder, current episode depressed, mild or moderate severity.

Key Diagnostic Point:

Bipolar disorder is a mood disorder characterized by episodes of mania and depression. The current episode of depression can vary in severity, with mild or moderate severity indicating that the symptoms are present but not debilitating. Patients may experience low mood, decreased energy, and changes in sleep and appetite, but they are generally able to function in daily activities. Diagnosis is based on clinical assessment, including the duration and impact of depressive symptoms. Treatment often involves mood stabilizers, psychotherapy, and lifestyle modifications. It is crucial to monitor for suicide risk, as individuals with bipolar disorder have a higher prevalence of suicidal ideation and attempts, particularly during depressive episodes. Regular assessments and a comprehensive treatment plan are essential for managing symptoms and improving quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in symptom presentation and severity
  • Need for thorough documentation of mood episodes
  • Differentiation from unipolar depression
  • Assessment of suicide risk and safety planning

Audit Risk Factors

  • Inadequate documentation of severity and duration of depressive episode
  • Failure to assess and document suicide risk
  • Misclassification of bipolar disorder type
  • Lack of evidence for treatment effectiveness

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed clinical notes on mood episodes, treatment plans, and patient progress.

Common Clinical Scenarios

Initial diagnosis of bipolar disorder, management of depressive episodes, and medication adjustments.

Billing Considerations

Ensure comprehensive assessment of mood states and suicide risk; document any changes in treatment response.

Primary Care

Documentation Requirements

Regular updates on patient mood, medication adherence, and any side effects experienced.

Common Clinical Scenarios

Routine follow-up for patients with known bipolar disorder, management of comorbid conditions.

Billing Considerations

Collaboration with mental health specialists for comprehensive care; awareness of medication interactions.

Coding Guidelines

Inclusion Criteria

Use F31.3 When
  • Follow ICD
  • CM guidelines for coding mood disorders, ensuring accurate documentation of the current episode's severity and duration
  • Include assessments of suicide risk and any comorbid conditions

Exclusion Criteria

Do NOT use F31.3 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

90834CPT Code

Psychotherapy, 45 minutes with patient

Clinical Scenario

Used for outpatient therapy sessions for patients with bipolar disorder experiencing depressive episodes.

Documentation Requirements

Document the patient's mood, treatment goals, and progress during therapy.

Specialty Considerations

Psychiatrists should ensure that therapy aligns with medication management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of bipolar disorder, improving the ability to capture the nuances of the condition, including the severity of episodes. This specificity aids in better treatment planning and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of bipolar disorder, improving the ability to capture the nuances of the condition, including the severity of episodes. This specificity aids in better treatment planning and resource allocation.

Reimbursement & Billing Impact

reimbursement and compliance.

Resources

Clinical References

  • •
    American Psychiatric Association - Diagnostic and Statistical Manual of Mental Disorders (DSM-5)

Coding & Billing References

  • •
    American Psychiatric Association - Diagnostic and Statistical Manual of Mental Disorders (DSM-5)

Frequently Asked Questions

What distinguishes F31.3 from other bipolar disorder codes?

F31.3 specifically indicates a current episode of depression that is mild or moderate in severity, whereas other codes may indicate more severe episodes or different phases of bipolar disorder.