ICD-10 code for Coxae senilis morbus

The ICD-10-CM code for Coxae senilis morbus is M16.9 (Osteoarthritis of hip, 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 M16.9.

Within M16, choose M16.9 (unspecified) only when documentation doesn't support a more specific option: bilateral primary osteoarthritis of hip (M16.0), unilateral primary osteoarthritis of hip (M16.1), bilateral osteoarthritis resulting from hip dysplasia (M16.2), unilateral osteoarthritis resulting from hip dysplasia (M16.3), bilateral post-traumatic osteoarthritis of hip (M16.4), unilateral post-traumatic osteoarthritis of hip (M16.5), other bilateral secondary osteoarthritis of hip (M16.6) and other unilateral secondary osteoarthritis of hip (M16.7).

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 553 (Bone Diseases and Arthropathies with MCC, relative weight 1.2494) and DRG 554 (Bone Diseases and Arthropathies without MCC, relative weight 0.8331), 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.