CPT Code 64450: Under Introduction/Injection of Anesthetic Agent (Nerve Block), Diagnostic or Therapeutic Procedures on the Somatic Nerves

Learn about the 64450 CPT code and its billing implications. Ensure accurate coding and improve your billing and documentation by reading this article.

Use Code

What is CPT code 64450?

CPT code 64450 describes injections of anesthetic agents, steroids, or both near peripheral nerves or branches that don't have their own specific CPT codes. As an anesthesiologist, neurologist, or pain management specialist, you might use this code when performing nerve blocks to diagnose or relieve chronic or acute pain. The procedure typically involves carefully placing a needle, often guided by imaging techniques, to inject medication precisely at the nerve site. CPT 64450 covers a wide range of peripheral nerves but doesn't include nerves that already have their own designated codes, such as the femoral or trigeminal nerves.

CPT code 64450 documentation requirements

Accurate and comprehensive documentation is essential for proper coding, billing, and compliance with guidelines established by Medicare Administrative Contractors and Medicaid Services.

Anatomical location and nerve targeted

Clearly document the specific peripheral nerve or branch targeted for the nerve block. Identifying the anatomical location is crucial to support medical necessity and proper billing and coding.

Medication(s) and volume

Record the anesthetic agent and/or steroid administered, including precise dosage and volume. This detailed information justifies clinical decision-making and helps validate billing.

Injection technique and guidance (if applicable)

Provide details on the injection technique, including any imaging guidance used (e.g., ultrasound, fluoroscopy). Include notes on needle placement accuracy, the type of localization device utilized, and images, if applicable, to reinforce appropriate documentation.

Patient response and complications

Document the patient's immediate response to the nerve block, including relief from chronic pain, improvement in function, or adverse effects. Noting any complications or reactions supports ongoing clinical care and future treatment decisions.

CPT code 64450 billing guidelines

Proper billing practices ensure compliance with Medicare payment rules and guidelines from the American Medical Association.

Use once per nerve per session

Bill CPT 64450 only once per peripheral nerve or branch injected during a single treatment session. Multiple injections into the same nerve should not be billed separately, regardless of the number of injections administered.

Modifier 59 if multiple nerves blocked

When injections involve different peripheral nerves during one session, append Modifier 59 (Distinct Procedural Service) to indicate separate nerve blocks. Each nerve block must be distinct and supported by medical necessity.

Do not use for major nerve blocks like femoral nerve (use 64447)

Avoid using CPT 64450 for peripheral nerve blocks with dedicated codes such as femoral nerve blocks (64447), brachial plexus blocks, sciatic nerve blocks, or trigeminal nerve injections. Billing the correct specific CPT codes ensures accurate coding and reimbursement.

Report ultrasound guidance (76942) separately if applicable

If ultrasound or other imaging guidance is employed for needle localization during the nerve block, separately bill CPT 76942. Documentation must explicitly support the medical necessity of imaging for accurate localization.

Related CPT codes

64405 – Injection(s), anesthetic agent; greater occipital nerve
64415 – Injection(s), anesthetic agent; brachial plexus
64445 – Injection(s), anesthetic agent; sciatic nerve
64447 – Injection(s), anesthetic agent; femoral nerve block
64400 – Injection(s), anesthetic agent; trigeminal nerve branches
64450 – Injection(s), anesthetic agent(s) and/or steroid; other peripheral nerve or branch

Frequently asked questions

No. Imaging guidance, such as ultrasound, is not included in CPT 64450. If ultrasound guidance is medically necessary and properly documented, bill separately with CPT code 76942.

No. CPT 64450 is specifically for peripheral nerve or branch injections not covered by other codes. Sympathetic nerve blocks have separate, dedicated CPT codes and should not be reported with 64450.

You can bill CPT 64450 once per distinct peripheral nerve or branch injected per session. If multiple separate nerves are injected during the same encounter, use Modifier 59 for each additional nerve to clearly differentiate services.