ICD-10 Code G89.4 – Chronic pain syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G89.4 – Chronic pain syndrome
What it is
G89.4 identifies chronic pain syndrome, a persistent pain condition that affects function and may involve physical and psychological components. Use it when the record clearly documents chronic pain syndrome, not just pain alone.
Clinical signs
Clinical features vary; refer to documentation. Records may describe ongoing pain with reduced activity, sleep disturbance, mood changes, or impaired daily function, but the diagnosis should be explicitly stated or clearly supported.
When to use this code
Use G89.4 when the provider documents chronic pain syndrome as the diagnosis. It may appear in problem lists, assessment notes, or specialist evaluations for long-standing pain with functional impact.
Do not infer this code from chronic pain complaints alone. If the note only mentions pain in a specific site or generalized chronic pain, check documentation for whether syndrome-level coding is supported.
Do not use for
Do not use this code for acute pain, postoperative pain, or pain limited to a clearly identified site without documentation of chronic pain syndrome. Check documentation if the diagnosis is uncertain.
Coding tip
Assign G89.4 only when the provider names chronic pain syndrome; otherwise, code the documented pain condition more specifically.