M89.421
✓ Billable
Other hypertrophic osteoarthropathy, right upper arm
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M89.421
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M89.421?
ICD-10-CM code M89.421 represents Other hypertrophic osteoarthropathy, right upper arm. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M89.421 billable?
Yes. M89.421 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M89.421 in?
M89.421 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M89 category
M89
Other disorders of bone
Non-billable
M89.0
Algoneurodystrophy
Non-billable
M89.1
Physeal arrest
Non-billable
M89.2
Other disorders of bone development and growth
Non-billable
M89.3
Hypertrophy of bone
Non-billable
M89.4
Other hypertrophic osteoarthropathy
Non-billable
M89.5
Osteolysis
Non-billable
M89.6
Osteopathy after poliomyelitis
Non-billable
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