M63.861
✓ Billable
Disorders of muscle in diseases classified elsewhere, right lower leg
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M63.861
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 M63.861?
ICD-10-CM code M63.861 represents Disorders of muscle in diseases classified elsewhere, right lower leg. 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 M63.861 billable?
Yes. M63.861 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M63.861 in?
M63.861 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M63 category
M63
Disorders of muscle in diseases classified elsewhere
Non-billable
M63.8
Disorders of muscle in diseases classified elsewhere
Non-billable
M63.80
Disorders of muscle in diseases classified elsewhere, unspecified site
Billable
M63.81
Disorders of muscle in diseases classified elsewhere, shoulder
Non-billable
M63.82
Disorders of muscle in diseases classified elsewhere, upper arm
Non-billable
M63.83
Disorders of muscle in diseases classified elsewhere, forearm
Non-billable
M63.84
Disorders of muscle in diseases classified elsewhere, hand
Non-billable
M63.85
Disorders of muscle in diseases classified elsewhere, thigh
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →