ICD-10-CM · Chapter 3 · D50–D89
D84.1
Defects in the complement system
Diseases of the blood and immune mechanism
Quick facts
- Code
- D84.1
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 3 — Diseases of the blood and immune mechanism
- Category
- D84 — Other immunodeficiencies
- Specificity
- 4 characters
How coders use this code
ICD-10-CM D84.1 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of defects in the complement system. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in D84
- D84Other immunodeficiencies
- D84.0Lymphocyte function antigen-1 [LFA-1] defect
- D84.8Other specified immunodeficiencies
- D84.81Immunodeficiency due to conditions classified elsewhere
- D84.82Immunodeficiency due to drugs and external causes
- D84.821Immunodeficiency due to drugs
- D84.822Immunodeficiency due to external causes
- D84.89Other immunodeficiencies
- D84.9Immunodeficiency, unspecified
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