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M89.421

Billable

Other hypertrophic osteoarthropathy, right upper arm

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A condition where bones and tissues in the right upper arm become abnormally thickened and enlarged, causing swelling and structural changes.

Coding Tips

  • •Confirm the location is the upper arm (between shoulder and elbow) and not the shoulder itself
  • •Document whether this affects function or causes pain for clinical context

Code Hierarchy

└M89Other disorders of bone└M89.4Other hypertrophic osteoarthropathy└M89.42Other hypertrophic osteoarthropathy, upper arm└M89.421Other hypertrophic osteoarthropathy, right upper arm
└M89.421Other hypertrophic osteoarthropathy, right upper arm

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