M66

Classification

Category:Diseases of the musculoskeletal system and connective tissue

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Coding Guidance

M66 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength

Excludes 2

rotator cuff syndrome

rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region

Use Additional Code

From M00-M99

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

More Specific Codes

M66.0

Rupture of popliteal cyst

M66.1

Rupture of synovium

M66.2

Spontaneous rupture of extensor tendons

M66.3

Spontaneous rupture of flexor tendons

M66.8

Spontaneous rupture of other tendons

M66.9

Spontaneous rupture of unspecified tendon

External Resources

2025 ICD-10 guidelines from CMS.gov