Is ICD-10-CM code D84 billable?

No, D84 (Other immunodeficiencies) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code D84 belong to?

D84 belongs to Chapter 3 of the ICD-10-CM tabular list: D50–D89 (Diseases of the Blood and Blood-Forming Organs).

D84

Non-Billable

ChapterD50–D89

Rankcategory

Description

Other immunodeficiencies

About ICD-10-CM code D84

D84 is the ICD-10-CM diagnosis code for Other immunodeficiencies. It sits in D50-D89 Diseases of the Blood and Blood-Forming Organs, within Certain disorders involving the immune mechanism (D80-D89). D84 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (3 billable, 1 non-billable)

D84.0Lymphocyte function antigen-1 [LFA-1] defect D84.1Defects in the complement system D84.8Other specified immunodeficiencieshas subcodes D84.9Immunodeficiency, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 3: Diseases of the Blood and Blood-Forming Organs (D50-D89).

CH3 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

autoimmune disease (systemic) NOS (M35.9)
certain conditions originating in the perinatal period (P00-P96)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
human immunodeficiency virus [HIV] disease (B20)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

D80-D89 Parent Instructions

Includes

defects in the complement system
immunodeficiency disorders, except human immunodeficiency virus [HIV] disease
sarcoidosis

Excludes1(Not coded here. Use a different code.)

autoimmune disease (systemic) NOS (M35.9)
functional disorders of polymorphonuclear neutrophils (D71-)
human immunodeficiency virus [HIV] disease (B20)

Clinical Hierarchy

BillableHas subcodes

CH3Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

D80-D89Certain disorders involving the immune mechanism (D80-D89)

D84Other immunodeficienciesNot billable

D84.0Lymphocyte function antigen-1 [LFA-1] defectBillable

D84.1Defects in the complement systemBillable

D84.8Other specified immunodeficienciesSubcodes

D84.9Immunodeficiency, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to D84:

blockD80-D89

Certain disorders involving the immune mechanism (D80-D89)

View context instructions

chapterCH3

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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