M89.421 Other hypertrophic osteoarthropathy, right upper arm

Billable ICD-10-CM code, FY2026.

Applies from M89.4 Other hypertrophic osteoarthropathy

Applicable to

• Marie-Bamberger disease
• Pachydermoperiostosis

MS-DRG index

Defines the logic of DRG(s) 553-554 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 731.2 Hypertrophic pulmonary osteoarthropathy (approximate)

Code annotations containing back-references to M89.421

Back-references to M89.4

• Code First: L62 Nail disorders in diseases classified elsewhere ("pachydermoperiostosis (M89.4-)")

Nearby codes

• M89.41 Other hypertrophic osteoarthropathy, shoulder
• M89.411 Other hypertrophic osteoarthropathy, right shoulder
• M89.412 Other hypertrophic osteoarthropathy, left shoulder
• M89.419 Other hypertrophic osteoarthropathy, unspecified shoulder
• M89.42 Other hypertrophic osteoarthropathy, upper arm
• M89.421 Other hypertrophic osteoarthropathy, right upper arm (this code)
• M89.422 Other hypertrophic osteoarthropathy, left upper arm
• M89.429 Other hypertrophic osteoarthropathy, unspecified upper arm
• M89.43 Other hypertrophic osteoarthropathy, forearm
• M89.431 Other hypertrophic osteoarthropathy, right forearm
• M89.432 Other hypertrophic osteoarthropathy, left forearm