D83.9 — Common variable immunodeficiency, unspecified
Is D83.9 billable?
Yes, but D83.9 is an unspecified code. D83.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, D83.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting D83.9 — the more specific alternatives are listed below.
More specific alternatives
- D83.0Common variable immunodeficiency with predominant abnormalities of B-cell numbers and function
- D83.1Common variable immunodeficiency with predominant immunoregulatory T-cell disorders
- D83.2Common variable immunodeficiency with autoantibodies to B- or T-cells
- D83.8Other common variable immunodeficiencies
D83.9 at a glance
| Code | D83.9 |
|---|---|
| Description | Common variable immunodeficiency, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does D83.9 group to?
D83.9 sits in MDC 16 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 814Reticuloendothelial and Immunity Disorders with MCCmedical
- 815Reticuloendothelial and Immunity Disorders with CCmedical
- 816Reticuloendothelial and Immunity Disorders without CC/MCCmedical
As a secondary diagnosis, D83.9 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is D83.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to D83.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Immunodeficiency › common variable
Excludes1 — never code together — inherited from D80-D89
The conditions below can never be reported together with D83.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 3
The conditions below are not part of D83.9, but a patient may have both at the same time. When documentation supports it, D83.9 and the excluded code may both be reported.
- 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)
Excludes2 — not included here — inherited from D80-D89
The conditions below are not part of D83.9, but a patient may have both at the same time. When documentation supports it, D83.9 and the excluded code may both be reported.
- human immunodeficiency virus [HIV] disease (B20)
How long has D83.9 existed?
D83.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which conditions are coded to D83.9?
What other codes are in the D83 family? (4)
- D83.0Common variable immunodeficiency with predominant abnormalities of B-cell numbers and function
- D83.1Common variable immunodeficiency with predominant immunoregulatory T-cell disorders
- D83.2Common variable immunodeficiency with autoantibodies to B- or T-cells
- D83.8Other common variable immunodeficiencies