A patient with Parkinson's has sialorrhea.

Injection of atropine: Atropine is administered to reduce sialorrhea.

Bilateral submandibular salivary glands: The physician administers the injections into the salivary glands.

Total of four glands: Indicates that multiple glands are treated in the same session.

CPT code 64611 accurately represents chemodenervation of the salivary glands, bilateral. The use of -50, -52, or x4 modifiers is not appropriate since CPT guidelines include bilateral procedures in this code without needing additional modifiers or codes.

References: AMA's CPT® Professional Edition (current year)