M66.31 Spontaneous rupture of flexor tendons, shoulder

Non-billable header with 3 child codes.

Applies from M66 Spontaneous rupture of synovium and tendon

Includes

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

Excludes2 (not included here)

• rotator cuff syndrome (M75.1-)
• rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region

Codes under M66.31

• M66.311 Spontaneous rupture of flexor tendons, right shoulder
• M66.312 Spontaneous rupture of flexor tendons, left shoulder
• M66.319 Spontaneous rupture of flexor tendons, unspecified shoulder

Code annotations containing back-references to M66.31

Back-references to M66

• Type 2 Excludes: M62.1 Other rupture of muscle (nontraumatic) ("rupture of tendon (M66.-)")

Diagnosis Index entries for M66.31

• Rupture, ruptured › tendon (traumatic) › nontraumatic (spontaneous) › flexor › shoulder region

Nearby codes

• M66.279 Spontaneous rupture of extensor tendons, unspecified ankle and foot
• M66.28 Spontaneous rupture of extensor tendons, other site
• M66.29 Spontaneous rupture of extensor tendons, multiple sites
• M66.3 Spontaneous rupture of flexor tendons
• M66.30 Spontaneous rupture of flexor tendons, unspecified site
• M66.31 Spontaneous rupture of flexor tendons, shoulder (this code)
• M66.311 Spontaneous rupture of flexor tendons, right shoulder
• M66.312 Spontaneous rupture of flexor tendons, left shoulder
• M66.319 Spontaneous rupture of flexor tendons, unspecified shoulder
• M66.32 Spontaneous rupture of flexor tendons, upper arm
• M66.321 Spontaneous rupture of flexor tendons, right upper arm