ICD-10 code for musculoskeletal system acquired deformity

The ICD-10-CM code for musculoskeletal system acquired deformity is M95.9 (Acquired deformity of musculoskeletal system, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M95.9.

Within M95, choose M95.9 (Acquired deformity of musculoskeletal system, unspecified) only when documentation doesn't support a more specific option: acquired deformity of nose (M95.0), Cauliflower ear (M95.1), other acquired deformity of head (M95.2), acquired deformity of neck (M95.3), acquired deformity of chest and rib (M95.4), acquired deformity of pelvis (M95.5) and other specified acquired deformities of musculoskeletal system (M95.8).

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.