2021 ICD-10-CM Code D84.821

Immunodeficiency due to drugs

Version 2021
Billable Code
New Code
MS-DRG Mapping

Valid for Submission

D84.821 is a billable diagnosis code used to specify a medical diagnosis of immunodeficiency due to drugs. The code D84.821 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

ICD-10:D84.821
Short Description:Immunodeficiency due to drugs
Long Description:Immunodeficiency due to drugs

Code Classification

New 2021 ICD-10 Code

D84.821 is new to ICD-10 code set for the FY 2021, effective October 1, 2020. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This is a new and revised code for the FY 2021 (October 1, 2020 - September 30, 2021).

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code D84.821:


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code D84.821 are found in the index:

Replacement Code

D84821 replaces the following previously assigned ICD-10 code(s):

Code History

  • FY 2021 - Code Added, effective from 10/1/2020 through 9/30/2021