Specific code 2015 ICD-9-CM Diagnosis Code 995.21
Arthus phenomenon
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 995.21 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 995.21 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 995.21 converts approximately to:
  • 2015/16 ICD-10-CM T78.41XA Arthus phenomenon, initial encounter
Approximate Synonyms
  • Arthus type urticaria
Clinical Information
  • A dermal inflammatory reaction produced under conditions of antibody excess, when a second injection of antigen produces intravascular antigen-antibody complexes which bind complement, causing cell clumping, endothelial damage, and vascular necrosis
  • Development of an inflammatory lesion a few hours after intradermal injection of antigen into a sensitized animal; the lesion results from precipitation of immune complex, which causes complement activation and tissue destruction
Applies To
  • Arthus reaction
ICD-9-CM Volume 2 Index entries containing back-references to 995.21:
  • Arthus phenomenon 995.21
    • due to
      • correct substance properly administered 995.21
      • overdose or wrong substance given or taken 977.9
        • specified drug - see Table of Drugs and Chemicals
      • serum 999.59
  • Phenomenon
    • Arthus 995.21
  • Reaction
    • Arthus 995.21
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 995.21 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.