ICD-10 code for Osteochondromatosis

The ICD-10-CM code for Osteochondromatosis is D16.9 (Benign neoplasm of bone and articular cartilage, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on D16.9.

Within D16, choose D16.9 (unspecified) only when documentation doesn't support a more specific option: scapula and long bones of upper limb (D16.0), short bones of upper limb (D16.1), long bones of lower limb (D16.2), short bones of lower limb (D16.3), bones of skull and face (D16.4), lower jaw bone (D16.5), vertebral column (D16.6), ribs, sternum and clavicle (D16.7) and 1 more.

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.