ICD-10 code for amputation stump necrosis

The ICD-10-CM code for amputation stump necrosis is T87.50 (Necrosis of amputation stump, unspecified extremity). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T87.50.

Within T87.5, choose T87.50 (unspecified extremity) only when documentation doesn't support a more specific option: right upper extremity (T87.51), left upper extremity (T87.52), right lower extremity (T87.53) and left lower extremity (T87.54).

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 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.