ICD-10 Code F45.42 – Pain disorder with related psychological factors (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F45.42 – Pain disorder with related psychological factors
What it is
F45.42 identifies pain that is influenced by psychological factors, where emotional or mental health issues contribute to the experience or persistence of pain. Use it when the documentation clearly links pain to related psychological factors.
Clinical signs
Clinical features vary; refer to documentation. You may see chronic pain with associated anxiety, depression, stress, or other psychological contributors noted by the clinician.
When to use this code
Use this code when the provider documents pain disorder with related psychological factors or a similar diagnosis. It is appropriate when the record shows psychological factors are part of the pain picture, not just a separate mental health condition. Check documentation for the clinician’s stated relationship between pain and psychology.
Do not use for
Do not use this code for pain without documented psychological involvement, or when pain is better explained by a physical condition alone. Check documentation if the record instead supports another pain diagnosis.
Coding tip
Code only when the chart explicitly connects the pain to psychological factors; otherwise, query the provider.