Summary & Overview
CPT 64647: Injection of Neurolytic Agent into Six or More Trunk Muscles
CPT code 64647 represents therapeutic injection of a chemical agent (for example, botulinum toxin) into six or more trunk muscles to relieve pain and spasms. This procedure is an established pain-management technique used for focal or segmental muscle hyperactivity affecting the trunk and can affect utilization patterns in both outpatient surgical settings and office-based specialty practices. Nationally, the code matters because it captures multi-muscle therapeutic interventions with implications for coding specificity, site-of-service considerations, and payer coverage policies.
Key payers covered in typical analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers can expect to find benchmarks for utilization and reimbursement practices, descriptions of clinical contexts where the code is reported, and summaries of relevant policy considerations that affect coverage and prior authorization. The publication outlines procedural context, common billing considerations, and how this service is typically delivered across ambulatory surgical centers, hospital outpatient departments, and specialty physician offices.
Data not available in the input is noted where specific payer rates, associated taxonomies, and ICD-10 diagnoses would normally be included.
Billing Code Overview
CPT code 64647 describes the injection of a chemical neurolytic agent, such as botulinum toxin (Botox®), into six or more trunk muscles to relieve pain and reduce spasms. This is a procedure-based pain management service focusing on large or multiple muscles of the trunk when symptom control is required.
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Service type: Therapeutic injection for pain and spasm control
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Typical site of service: Ambulatory surgical center, hospital outpatient department, or physician office depending on clinical complexity and monitoring needs
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with chronic spasticity and painful muscle hyperactivity in the trunk (for example, axial spasticity after spinal cord injury or multiple sclerosis) who has failed or had inadequate response to oral antispasmodic medications and physical therapy. The patient is evaluated in a neurology, physiatry, or pain management clinic. The clinician documents focal trunk muscle groups contributing to pain and functional limitation, confirms candidacy for chemodenervation with a neuromuscular blocking agent (e.g., onabotulinumtoxinA), reviews risks and benefits, obtains informed consent, and schedules an outpatient procedure. On the day of service the patient is positioned to allow access to identified muscles, landmarks are palpated and/or electromyographic or ultrasound guidance is used to localize injections, and the provider injects chemodenervation into six or more trunk muscles to reduce spasm and pain. Post‑procedure monitoring is brief, discharge instructions address activity limitations and signs of systemic toxin spread, and follow‑up is arranged to assess effect and plan repeat injections if needed. Typical site of service is an outpatient clinic or ambulatory surgery center; hospital outpatient settings are also used for complex patients. Procedure billing will reflect the trunk muscle injection service using 64647 and may include appropriate modifiers for laterality, multiple procedures, reduced services, or team/surgeon identifiers.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 |