ICD-10-CM 2027
ICD-10 code for Alymphocytosis
From the official ICD-10-CM alphabetic index entry “Alymphocytosis”. Page updated September 29, 2026.
About coding Alymphocytosis
The ICD-10-CM code for Alymphocytosis is D72.810 (Lymphocytopenia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on D72.810.
Within D72.81 (decreased white blood cell count), D72.810 is specifically for Lymphocytopenia. Related codes cover other decreased white blood cell count (D72.818) and unspecified (D72.819).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Alymphocytosis codes (official index)
- thymic (with immunodeficiency) D82.1 — Di George's syndrome
Common questions about Alymphocytosis ICD-10 codes
What is the ICD-10 code for Alymphocytosis?
- D72.810 — Lymphocytopenia. More specific codes apply when the documentation supports them: D82.1.
What is the ICD-10 code for thymic alymphocytosis?
- D82.1 — Di George's syndrome.
Is D72.810 billable?
- Yes. D72.810 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D72.810 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D72.810 as a principal diagnosis.
Is D72.810 a CC or MCC?
- No. D72.810 is neither a CC nor an MCC under MS-DRG v44.0.