Transient hypogammaglobulinemia of infancy

This code describes a temporary deficiency in gamma globulins (antibodies) in an infant, typically resolving spontaneously by 18-36 months of age. It is characterized by lower-than-normal IgG levels, which can lead to increased susceptibility to recurrent infections, particularly respiratory and ear infections. This condition is distinct from primary immunodeficiencies.

Use this code when an infant presents with recurrent infections and laboratory findings confirm transiently low IgG levels, with other primary immunodeficiency causes ruled out. Documentation should clearly indicate the temporary nature of the hypogammaglobulinemia and the infant's age. This diagnosis is often made after monitoring and observing the infant's immune status over time.

• Ensure documentation specifies "transient" and "infancy" to differentiate from other forms of hypogammaglobulinemia.
• Do not use this code for congenital or acquired agammaglobulinemia or other primary immunodeficiency disorders.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if managing related infections.