M12.46
⚠ Non-billable
Intermittent hydrarthrosis, knee
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M12.46
System
ICD-10-CM
Billable
No — use specific code
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 M12.46?
ICD-10-CM code M12.46 represents Intermittent hydrarthrosis, knee. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M12.46 billable?
No. M12.46 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is M12.46 in?
M12.46 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M12 category
M12
Other and unspecified arthropathy
Non-billable
M12.0
Chronic postrheumatic arthropathy [Jaccoud]
Non-billable
M12.1
Kaschin-Beck disease
Non-billable
M12.2
Villonodular synovitis (pigmented)
Non-billable
M12.3
Palindromic rheumatism
Non-billable
M12.4
Intermittent hydrarthrosis
Non-billable
M12.5
Traumatic arthropathy
Non-billable
M12.8
Other specific arthropathies, not elsewhere classified
Non-billable
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