Skip to content
Dx

ICD-10-CM 2027 diagnosis code

T63.3Toxic effect of venom of spider

Not billable — use a more specific codeRequires 7th character

T63.3 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T63.3

T63.3 is the ICD-10-CM diagnosis code for toxic effect of venom of spider. It belongs to category T63 (toxic effect of contact with venomous animals and plants), block T51-T65 (toxic effects of substances chiefly nonmedicinal as to source) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within T63 (toxic effect of contact with venomous animals and plants), T63.3 is specifically for toxic effect of venom of spider. Related codes cover snake venom (T63.0), venom of other reptiles (T63.1), venom of scorpion (T63.2), venom of other arthropods (T63.4), contact with venomous fish (T63.5), contact with other venomous marine animals (T63.6), contact with venomous plant (T63.7), contact with other venomous animals (T63.8) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category T63

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to T63.3.

› From T63 Toxic effect of contact with venomous animals and plants
Includes
  • bite or touch of venomous animal
  • pricked or stuck by thorn or leaf
Excludes2
  • ingestion of toxic animal or plant (T61.-, T62.-)

Broader instructions also apply from T51-T65 Toxic effects of substances chiefly nonmedicinal as to source and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference T63.3

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T63.3

Is T63.3 billable?

No. T63.3 is a header code. Report one of its more specific subcodes instead.