ICD-10 code for mesenteric lymphadenitis

The ICD-10-CM code for mesenteric lymphadenitis is I88.0 (Nonspecific mesenteric lymphadenitis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I88.0.

Within I88 (nonspecific lymphadenitis), I88.0 is specifically for nonspecific mesenteric lymphadenitis. Related codes cover chronic lymphadenitis, except mesenteric (I88.1), 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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.