ICD-10 code for chronic lymphadenitis

The ICD-10-CM code for chronic lymphadenitis is I88.1 (Chronic lymphadenitis, except mesenteric). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on I88.1.

Within I88 (nonspecific lymphadenitis), I88.1 is specifically for chronic lymphadenitis, except mesenteric. Related codes cover nonspecific mesenteric lymphadenitis (I88.0), other nonspecific lymphadenitis (I88.8) and unspecified (I88.9).

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.