This resource is part of our Treatment Navigator, a comprehensive guide to common behavioral/mental health diagnoses and the evidence based practices (EBPs) that help these conditions.
Overview
Illness Anxiety Disorder (IAD), previously known as hypochondriasis, is characterized by a preoccupation with having or acquiring a serious medical illness despite minimal or no somatic symptoms. Individuals frequently engage in excessive health-related behaviors—such as body checking, repeated reassurance seeking, or compulsive online research—or may avoid medical care entirely out of fear. Symptoms persist for at least six months and cause significant distress or impairment. Treatment focuses on reducing health-related anxiety, restructuring catastrophic interpretations of bodily sensations, and promoting adaptive coping rather than reassurance-seeking cycles.
Indicated Evidence-Based Practices (EBPs)
- Cognitive Behavioral Therapy (CBT) for Health Anxiety – first-line, well-established treatment that targets maladaptive beliefs about illness, misinterpretation of sensations, and reassurance-seeking behaviors
- Mindfulness-Based Cognitive Therapy (MBCT) – cultivates nonjudgmental awareness of physical sensations and reduces rumination and anxiety
- Acceptance and Commitment Therapy (ACT) – helps clients disengage from health-related fears by focusing on values-based living and psychological flexibility
- Exposure and Response Prevention (ERP) – gradual exposure to feared health-related cues while reducing checking and reassurance behaviors
- Behavioral Stress Management (BSM) – incorporates relaxation training and stress reduction techniques to manage physiological arousal
- Collaborative Care Models – coordinate psychotherapy with primary care providers to ensure consistent communication and avoid unnecessary medical interventions
When to Choose What
CBT is the primary evidence-based approach and should be offered as first-line treatment.
ACT and MBCT are appropriate when clients struggle with experiential avoidance or cognitive fusion with anxious thoughts.
ERP may be integrated into CBT when reassurance-seeking or compulsive checking is prominent.
Behavioral stress management may serve as a supplement for clients with heightened physiological anxiety.
Collaborative care is essential when clients have ongoing medical consultations or multiple providers to prevent conflicting messaging and medical overutilization.
Core Components of Treatment
- Psychoeducation about health anxiety and the role of misinterpretation in symptom escalation
- Identification of triggers (e.g., media stories, bodily sensations, doctor visits) and maladaptive responses (checking, reassurance, avoidance)
- Cognitive restructuring of catastrophic beliefs (“A headache means a brain tumor”)
- Behavioral experiments to test feared predictions and disconfirm catastrophic interpretations
- Interoceptive exposure to benign sensations to reduce fear responses
- Mindfulness and acceptance strategies for managing uncertainty and distress
- Reduction of reassurance-seeking and avoidance behaviors through graded exposure
- Relapse prevention focused on tolerance of uncertainty and long-term maintenance strategies
Measures and Monitoring
Screening and diagnostic tools
- Health Anxiety Inventory (HAI): self-report measure for health-related worry and reassurance-seeking
- Whiteley Index (WI-7 or WI-14): validated screening tool for illness preoccupation and health anxiety severity
- Illness Attitude Scales (IAS): assess health fears, disease conviction, and avoidance behaviors
- GAD-7 and PHQ-9: assess co-occurring generalized anxiety and depression
- Structured Clinical Interview for DSM-5 (SCID-5): diagnostic confirmation and differential diagnosis from Somatic Symptom Disorder
Monitoring and outcome tools
- HAI or WI administered every 4–6 sessions to track reductions in anxiety and reassurance-seeking
- Behavioral monitoring logs to track avoidance and checking frequency
- WHO-5 Well-Being Index or General Self-Efficacy Scale for quality-of-life improvements
- Session Rating Scale (SRS) to monitor therapeutic alliance and engagement
Adaptations and Special Considerations
Medical collaboration: Coordinate with physicians to ensure consistent messaging, avoid redundant testing, and reduce inadvertent reinforcement of anxiety.
Therapeutic stance: Balance validation of distress with gentle challenge of catastrophic thinking; avoid reinforcing reassurance cycles.
Cultural considerations: Explore cultural beliefs about illness, spirituality, and body awareness; adjust psychoeducation accordingly.
Comorbidity: Assess for co-occurring generalized anxiety, depression, or obsessive-compulsive symptoms and integrate treatment as needed.
Telehealth: Effective for CBT and ACT-based interventions, particularly when integrated with online self-monitoring and exposure assignments.
Relapse prevention: Emphasize sustained uncertainty tolerance and balanced health behavior rather than symptom elimination.
References
American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).
Salkovskis, P. M., & Warwick, H. M. C. (2001). Making sense of hypochondriasis: A cognitive model of health anxiety. Psychological Medicine, 31(5), 823–829.
Hedman, E., Axelsson, E., Andersson, E., et al. (2016). Exposure-based cognitive-behavioral therapy via the internet and as bibliotherapy for somatic symptom disorder and illness anxiety disorder: A randomized controlled trial. Psychological Medicine, 46(14), 2779–2791.
Abramowitz, J. S., Braddock, A. E., & Storch, E. A. (2021). Clinical Handbook of Fear and Anxiety: Maintenance Processes and Treatment Mechanisms. American Psychological Association.
Furer, P., Walker, J. R., & Stein, M. B. (2007). Treating health anxiety and fear of death: A practitioner’s guide. New Harbinger Publications.
McManus, F., Surawy, C., Muse, K., Vazquez-Montes, M., & Williams, J. M. G. (2012). A randomized clinical trial of mindfulness-based cognitive therapy versus unrestricted services for health anxiety (hypochondriasis). Journal of Consulting and Clinical Psychology, 80(5), 817–828.