ICD-10 Diagnosis Code T63.303S

Toxic effect of unspecified spider venom, assault, sequela

Diagnosis Code T63.303S

ICD-10: T63.303S
Short Description: Toxic effect of unspecified spider venom, assault, sequela
Long Description: Toxic effect of unspecified spider venom, assault, sequela
This is the 2017 version of the ICD-10-CM diagnosis code T63.303S

Valid for Submission
The code T63.303S is 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 Medical Professionals

Diagnostic Related Groups
The diagnosis code T63.303S is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)

  • OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITH MCC 922
  • OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITHOUT MCC 923

Present on Admission (POA) Additional informationCallout TooltipPresent on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

The code T63.303S is exempt from POA reporting.

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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