d84

D84 is a designation used in the ICD-10-CM medical diagnosis classification to represent a subset of immunodeficiency disorders. It sits within the broader chapter block for immunodeficiencies, identified by the range D80–D89, and specifically covers conditions categorized as “Other immunodeficiencies.” This code is employed when a patient’s immune deficiency does not fit into more precisely named conditions within the ICD-10-CM system.

In practice, D84 and its decimal extensions (such as D84.x) function as a catch-all category for immunodeficiencies that are not described by more specific codes. The use of D84 allows medical coders to document the presence of an immunodeficiency while awaiting more specific etiological or descriptive information, or when a condition is inherently broad or not well characterized by existing codes. The exact subcodes and wording can vary between ICD-10-CM editions, and updates occur with annual revisions.

The code is primarily used for administrative purposes, including billing, health statistics, and epidemiological research. Accurate assignment of D84 can support data aggregation on immunodeficiency prevalence and outcomes, though clinicians are encouraged to apply the most precise code available for a given patient.

See also: ICD-10-CM, immunodeficiency disorders. Note that the exact scope and terminology of D84 may differ slightly across editions and jurisdictions; always consult the current ICD-10-CM tabular list for precise definitions.