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v1.0.0
ICD-10 Guide
ICD-10 CodesF45.21

F45.21

Billable

Hypochondriasis

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

Code Description

ICD-10 F45.21 is a billable code used to indicate a diagnosis of hypochondriasis.

Key Diagnostic Point:

Hypochondriasis, now referred to as Illness Anxiety Disorder in the DSM-5, is characterized by an excessive preoccupation with having or acquiring a serious illness. Individuals with this condition often misinterpret bodily sensations or minor symptoms as indicative of severe medical conditions, leading to significant distress and impairment in daily functioning. This disorder can manifest in various ways, including frequent medical consultations, excessive health-related research, and avoidance of situations perceived as risky to health. The anxiety associated with hypochondriasis can be debilitating, often co-occurring with other anxiety disorders such as generalized anxiety disorder (GAD), obsessive-compulsive disorder (OCD), or specific phobias. Effective management typically involves cognitive-behavioral therapy (CBT), which helps patients reframe their thoughts about health and illness, and may include medication for anxiety management. Understanding the psychological underpinnings of hypochondriasis is crucial for healthcare providers to offer appropriate support and treatment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating from other anxiety disorders
  • Potential overlap with somatic symptom disorder
  • Need for thorough documentation of symptoms and history
  • Variability in patient presentation

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to differentiate from other anxiety disorders
  • Misuse of related codes leading to upcoding or downcoding
  • Lack of evidence for treatment provided

Specialty Focus

Medical Specialties

Psychiatry

Documentation Requirements

Detailed patient history, symptom assessment, and treatment plan.

Common Clinical Scenarios

Patients presenting with health anxiety, frequent medical visits without clear medical findings.

Billing Considerations

Documentation should clearly outline the patient's anxiety symptoms and their impact on daily functioning.

Primary Care

Documentation Requirements

Comprehensive health assessments, including mental health screenings.

Common Clinical Scenarios

Patients with multiple complaints and frequent requests for tests despite normal results.

Billing Considerations

Primary care providers should document the rationale for referrals to mental health specialists.

Coding Guidelines

Inclusion Criteria

Use F45.21 When
  • According to ICD
  • 10 guidelines, F45
  • 21 should be used when the primary concern is health anxiety without significant somatic symptoms
  • Coders must ensure that the diagnosis is supported by clinical documentation and that it aligns with DSM
  • 5 criteria

Exclusion Criteria

Do NOT use F45.21 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

90834CPT Code

Psychotherapy, 45 minutes with patient

Clinical Scenario

Used for therapy sessions addressing health anxiety.

Documentation Requirements

Document the focus of therapy on health-related anxiety and coping strategies.

Specialty Considerations

Psychiatrists should ensure that therapy goals are clearly defined.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of mental health conditions, including hypochondriasis, which enhances the ability to track and manage these disorders effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of mental health conditions, including hypochondriasis, which enhances the ability to track and manage these disorders effectively.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of mental health conditions, including hypochondriasis, which enhances the ability to track and manage these disorders effectively.

Resources

Clinical References

  • •
    American Psychiatric Association - DSM-5

Coding & Billing References

  • •
    American Psychiatric Association - DSM-5

Frequently Asked Questions

What is the difference between hypochondriasis and somatic symptom disorder?

Hypochondriasis primarily involves anxiety about health without significant somatic symptoms, while somatic symptom disorder includes actual physical symptoms that cause distress.