G56.4 vs G89.2
G56.4 (Causalgia of upper limb) compared with G89.2 (Chronic pain, not elsewhere classified), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. G89.2 carries an Excludes1 note covering G56.4: “causalgia, upper limb (G56.4-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. G89.2 carries an Excludes1 note covering G56.4: “complex regional pain syndrome II, upper limb (G56.4-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| G56.4Causalgia of upper limb | G89.2Chronic pain, not elsewhere classified | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | G00-G99 — Diseases of the Nervous System (G00-G99) |
| Definition | Causalgia of upper limb is a non-billable ICD-10-CM category code (G56.4). | Chronic pain, not elsewhere classified is a non-billable ICD-10-CM category code (G89.2). |
| Includes | Complex regional pain syndrome II of upper limb | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources