Is D84.822 a billable ICD-10-CM code?

Yes. D84.822 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does D84.822 sit in the tabular list?

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), in the block Certain disorders involving the immune mechanism (D80-D89).

D84.822

D84.822 — Immunodeficiency due to external causes

Billable / specific codeICD-10-CM

D84.822 is a billable, specific ICD-10-CM code for immunodeficiency due to external causes. It is valid for submission on a claim.

Use additional code

Add a secondary code to capture the detail described below.

code for external cause such as:
exposure to ionizing radiation (W88)

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

, if applicable, radiological procedure and radiotherapy (Y84.2)

Risk adjustment

D84.822 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

D84.822 is named in 14 Medicare coverage policies — 14 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56464Billing and Coding: Flow Cytometry
A56638Billing and Coding: Gastrointestinal Pathogen (GIP) Panels Utilizing Multiplex Nucleic Acid Amplification Techniques (NAATs)
A56642Billing and Coding: Gastrointestinal Pathogen (GIP) Panels Utilizing Multiplex Nucleic Acid Amplification Techniques (NAATs)
A57044Billing and Coding: Removal of Benign Skin Lesions

How D84.822 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to D84.822.

Immunodeficiency›due to›external causes

Related codes at this level

Codes that share D84.82. If D84.822 is not quite right, the correct code is usually one of these.

D84.821Immunodeficiency due to drugs

Questions about D84.822

Is D84.822 a billable ICD-10-CM code?: Yes. D84.822 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D84.822 sit in the tabular list?: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), in the block Certain disorders involving the immune mechanism (D80-D89).