ICD-10 code for infrapatellar fat pad degeneration

The ICD-10-CM code for infrapatellar fat pad degeneration is M79.4 (Hypertrophy of (infrapatellar) fat pad).

Within M79 (other and unspecified soft tissue disorders, not elsewhere classified), M79.4 is specifically for hypertrophy of (infrapatellar) fat pad. Related codes cover rheumatism, unspecified (M79.0), myalgia (M79.1), neuralgia and neuritis, unspecified (M79.2), panniculitis, unspecified (M79.3), residual foreign body in soft tissue (M79.5), pain in limb, hand, foot, fingers and toes (M79.6), Fibromyalgia (M79.7), other specified soft tissue disorders (M79.8) and 2 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 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.