ICD-10 Diagnosis Code T63.311

Toxic effect of venom of black widow spider, accidental

Diagnosis Code T63.311

ICD-10: T63.311
Short Description: Toxic effect of venom of black widow spider, accidental
Long Description: Toxic effect of venom of black widow spider, accidental (unintentional)
This is the 2017 version of the ICD-10-CM diagnosis code T63.311

Not Valid for Submission
The code T63.311 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
      • Toxic effect of contact with venomous animals and plants (T63)

Information for Patients


Spider Bites

Though many people are afraid of spiders, they rarely bite people unless threatened. Most spider bites are harmless. Occasionally, spider bites can cause allergic reactions. And bites by the venomous black widow and brown recluse spiders can be very dangerous to people.

If you are bitten by a spider, you may see a reaction similar to that of a bee sting, including redness, pain and swelling at the site. To treat a spider bite:

  • Wash the area well with soap and water
  • Apply an ice pack or a wet compress to the area
  • Take over-the-counter pain medicine, if needed
  • Consider using antihistamines for severe swelling
  • Seek medical treatment for small children and adults with severe symptoms

  • Black widow spider (Medical Encyclopedia)
  • Brown recluse spider (Medical Encyclopedia)
  • Funnel-web spider bite (Medical Encyclopedia)
  • Tarantula spider (Medical Encyclopedia)


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