S66.811 Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand

ICD-10-CM S66.811: Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand

ICD-10-CM code S66.811 is an active terminology record for the strain of other specified muscles, fascia, and tendons at the wrist and hand level of the right hand. The concept is classified under the semantic type of injury or poisoning and has no narrower concepts listed beneath it. 1

Plain-language overview

The terminology record for S66.811 identifies a strain of other specified muscles, fascia, and tendons at the wrist and hand level of the right hand, and it carries the semantic type of injury or poisoning. 1

What this code represents

The official preferred name for S66.811 is strain of other specified muscles, fascia and tendons at wrist and hand level, right hand, and the record status is currently active. 1

Coding details

S66.811 is a child concept of S66.81, which broadly covers strains of other specified muscles, fascia, and tendons at the wrist and hand level, and the S66.811 record has no narrower concepts. 1

The terminology system includes related alphanumeric codes S66.811A and S66.811D, which both list the base diagnosis of strain of other specified muscles, fascia and tendons at wrist and hand level, right hand. 3 4

Documentation considerations

The official terminology record for S66.811 includes an abbreviation specifying the strain of musc, fasc, and tend at wrist and hand level for the right hand, along with its parent concept. 1

What the sources add

The National Cancer Institute terminology record establishes the active status and parent concept for S66.811, while the EVS Explore source lists the related S66.811A and S66.811D code variations. 1 3 4

Coverage and utilization context

A Medicare billing and coding article for tendon injections includes a list entry for the strain of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela. 6

Clinical context

A general clinical reference notes that hand and wrist symptoms may localize to the wrist, affect the entire hand, or radiate into the forearm, and that therapy focuses on restoring function and reducing pain. 2

Sources

1. ICD-10-CM S66.811 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. Article - Billing and Coding: Nonvascular Extremity Ultrasound (A56787) — cms.gov; accessed 2026-07-27.
6. Article - Billing and Coding: Injections - Tendon, Ligament, Ganglion Cyst, Tunnel Syndromes and Morton's Neuroma (A57079) — cms.gov; accessed 2026-07-27.