CPT code 20551 represents a therapeutic injection performed at the origin or insertion of a tendon to reduce pain, inflammation, and swelling from a diseased or damaged tendon. This procedure is commonly used by musculoskeletal specialists, pain management clinicians, and orthopedists and has national relevance because tendon injections are a frequent conservative treatment for tendonitis, tendinopathy, and related overuse injuries.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The review provides a national perspective on coding intent, site-of-service considerations, and common clinical contexts in which the injection is used. Readers will find benchmarks for utilization and reimbursement patterns, summaries of relevant policy and coverage language from major payers where available, and a clinical context section that clarifies when this targeted tendon-origin/insertion injection is typically reported versus other musculoskeletal injection codes.

The content is organized to support billing professionals, practice managers, and clinicians: concise code definition and typical settings, payer coverage framing, documentation and coding considerations, and links to related code groupings. Data not available in the input is noted where applicable.