June 10, 2021

Question:
Which CPT code is used 20550 or 20551 for a trigger finger /A1 pulley injection?

Answer:
CPT code 20550 defines an injection to a single tendon sheath, or ligament, aponeurosis (eg, plantar “fascia”).
CPT code 20551 defines an injection to single tendon at the origin/insertion site.
Trigger finger injections are most commonly given to the flexor tendon, supporting CPT code 20550.

*This response is based on the best information available as of 06/10/21