M66.21 Spontaneous rupture of extensor 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 M66.21

• M66.211 Spontaneous rupture of extensor tendons, right shoulder
• M66.212 Spontaneous rupture of extensor tendons, left shoulder
• M66.219 Spontaneous rupture of extensor tendons, unspecified shoulder

Code annotations containing back-references to M66.21

Back-references to M66

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

Diagnosis Index entries for M66.21

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

Nearby codes

• M66.178 Rupture of synovium, left toe(s)
• M66.179 Rupture of synovium, unspecified toe(s)
• M66.18 Rupture of synovium, other site
• M66.2 Spontaneous rupture of extensor tendons
• M66.20 Spontaneous rupture of extensor tendons, unspecified site
• M66.21 Spontaneous rupture of extensor tendons, shoulder (this code)
• M66.211 Spontaneous rupture of extensor tendons, right shoulder
• M66.212 Spontaneous rupture of extensor tendons, left shoulder
• M66.219 Spontaneous rupture of extensor tendons, unspecified shoulder
• M66.22 Spontaneous rupture of extensor tendons, upper arm
• M66.221 Spontaneous rupture of extensor tendons, right upper arm