2025 CPT code 20550

Injection(s); single tendon sheath, or ligament, aponeurosis (e.g., plantar "fascia").

Do not report 20550 for injections into peripheral nerves or for Morton's neuroma. Use 64455 or 64632 for Morton's neuroma injections.

Modifiers such as 50 (bilateral procedure), 59 (distinct procedural service), LT (left side), RT (right side), and F1-F9 and FA-FC (finger and thumb modifiers) can be applied when appropriate.

Medical necessity for this injection should be supported by documentation of the patient's condition, including signs, symptoms, and failed conservative treatments.

After administering anesthesia and preparing the injection site, the provider injects the medication into the targeted area.

IMPORTANT For injection of Morton's neuroma, use 64455 or 64632.

In simple words: An aponeurosis is like a flat sheet extending from a tendon. This procedure involves injecting medicine into a tendon sheath, ligament, or aponeurosis to reduce pain and inflammation. The injection usually contains a corticosteroid, anesthetic, or anti-inflammatory drug. These injections are also known as trigger point injections, targeting painful knots in muscles that haven't relaxed due to injury or overuse.

Injection(s); single tendon sheath, or ligament, aponeurosis (e.g., plantar "fascia"). Notes: (For injection of Morton's neuroma, see 64455, 64632)

Example 1: A patient presents with plantar fasciitis. The physician injects a corticosteroid into the plantar fascia using code 20550., A patient experiences pain and inflammation in the thumb's tendon sheath. The physician injects an anti-inflammatory medication using code 20550. For bilateral injections, modifier 50 would be appended, and specific joint location would be documented., A patient with de Quervain's tenosynovitis receives an injection around the affected tendon sheath in the wrist, coded as 20550.

Documentation should specify the exact location of the injection (e.g., specific tendon, ligament, or aponeurosis) and the medication injected. For bilateral procedures, document each injection site separately.

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