T63.3 vs W57
T63.3 (Toxic effect of venom of spider) compared with W57 (Bitten or stung by nonvenomous insect and other nonvenomous arthropods), 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. W57 carries an Excludes1 note covering T63.3: “contact with venomous insects and arthropods (T63.2-, T63.3-, T63.4-)”
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. W57 carries an Excludes1 note covering T63.3: “Toxic effect of contact with venomous animals and plants (T63.-)”
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
| T63.3Toxic effect of venom of spider | W57Bitten or stung by nonvenomous insect and other nonvenomous arthropods | |
|---|---|---|
| Billing status | Non-billable header Report instead: T63.301A, T63.301D, T63.301S, T63.302A, T63.302D | Non-billable header |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Toxic effect of venom of spider is a non-billable ICD-10-CM category code (T63.3). | Bitten or stung by nonvenomous insect and other nonvenomous arthropods is a non-billable ICD-10-CM category code (W57). |
| 7th character | The appropriate 7th character is to be added to each code from category T63 | The appropriate 7th character is to be added to code W57 |
| Includes | bite or touch of venomous animal pricked or stuck by thorn or leaf | — |
| Use additional code | code(s): for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) personal history of foreign body fully removed (Z87.821) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources