Podiatry Coding & Billing Alert

Question: I recently received a denial for a cortisone injection to the sinus tarsi with CPT code 20550. Is there a more appropriate code for this procedure?

Montana Subscriber

Answer: The correct code for this procedure is hard to pin down, because the sinus tarsi is neither a joint nor a ligament, but a space.

Your coding will depend on whether the podiatrist administers an injection into the surrounding soft tissue -- in which case 20550 (Injection[s]; single tendon sheath, or ligament, aponeurosis [e.g., plantar "fascia"]) is appropriate -- or, most often, into the actual sinus tarsi space. If this is the case, you can more accurately describe your work using 20605 (Arthrocentesis, aspiration and/or injection; intermediate joint or bursa [e.g., temporomandibular, acromioclavicular, wrist, elbow or ankle, olecranon bursa]).

Watch out: In some cases, you may find that Medicare only approves 20600 (Arthrocentesis, aspiration and/or injection; small joint or bursa [e.g., fingers, toes]). But check with your individual carrier for its preferences.

Your diagnosis will also need to support the appropriate injection code. Podiatrists most often use ICD-9 code 726.79 (Other enthesopathy of ankle and tarsus) to report sinus tarsi syndrome.

Don't forget to use a corresponding J code to gain reimbursement for the drug. In the case of cortisone, use J0833-J0834 (Injection, cosyntropin ...).