ICD-10-CM 2027
ICD-10 code for splenic mass
From the official ICD-10-CM alphabetic index entry “Mass › splenic”. Page updated September 29, 2026.
About coding splenic mass
The ICD-10-CM code for splenic mass is R16.1 (Splenomegaly, not elsewhere classified).
Within R16 (Hepatomegaly and splenomegaly, not elsewhere classified), R16.1 is specifically for splenomegaly, not elsewhere classified. Related codes cover Hepatomegaly, not elsewhere classified (R16.0) and Hepatomegaly with splenomegaly, not elsewhere classified (R16.2).
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.
Common questions about splenic mass ICD-10 codes
What is the ICD-10 code for splenic mass?
- R16.1 — Splenomegaly, not elsewhere classified.
Is R16.1 billable?
- Yes. R16.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R16.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R16.1 as a principal diagnosis.
Is R16.1 a CC or MCC?
- No. R16.1 is neither a CC nor an MCC under MS-DRG v44.0.