C1q Deficiency 3 C5830423
An immune deficiency where the body lacks a key immune protein, leading to frequent infections and higher risk of autoimmune diseases like lupus. Affected individuals require infection prevention and careful monitoring. Treatment involves managing infections and immune symptoms.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- severe
- Chronic
- true
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy