Summary & Overview
CPT 64510: Stellate (Cervicothoracic) Ganglion Block for Sympathetic Pain
CPT code 64510 identifies a stellate (cervicothoracic) ganglion block, an interventional pain procedure that blocks sympathetic nerves supplying the upper extremities, head, neck, and portions of the chest. Clinically important for treating type I complex regional pain syndrome (reflex sympathetic dystrophy) and other sympathetically mediated pain, this code is widely used in outpatient interventional pain management and peri-procedural pain services nationwide. The code matters because it affects coverage policy, utilization oversight, and payment for an evidence-sensitive procedure delivered across ambulatory surgery centers, hospital outpatient departments, and pain clinics.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical indications and the typical service setting, an overview of payer coverage considerations and common modifiers used with the code, and pointers to related billing and documentation issues. The publication also summarizes relevant benchmarking topics and policy trends that influence authorization and reimbursement for interventional sympathetic nerve blocks.
This summary provides clinicians, billing professionals, and policy analysts with the clinical context and administrative framing needed to understand how CPT code 64510 is used and governed across major payers at a national level.
Billing Code Overview
CPT code 64510 describes a stellate ganglion (cervicothoracic ganglion) block, a sympathetic nerve block performed to interrupt pain signaling to the upper extremities, head, neck, and cardiac regions. The procedure is used primarily to reduce symptoms of type I complex regional pain syndrome (reflex sympathetic dystrophy) and to treat other pain syndromes mediated by the cervicothoracic sympathetic chain.
Service type: Therapeutic nerve block / interventional pain procedure
Typical site of service: Outpatient procedure suite, ambulatory surgery center, or hospital outpatient department
Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 45-year-old female with a 3-month history of severe, burning pain, swelling, and temperature asymmetry of the right upper extremity after distal radius fracture presents for diagnostic and therapeutic sympathetic blockade. Conservative therapies including physical therapy, oral neuropathic agents, and corticosteroid trials produced inadequate relief. The interventional pain physician performs a right-sided stellate (cervicothoracic) ganglion block under fluoroscopic or ultrasound guidance in an ambulatory surgical center. The patient receives monitored anesthesia care, sterile prep, and local skin anesthetic; the physician advances a needle to the anterior surface of the longus colli at the C6–C7 level, confirms position with contrast or ultrasound, and injects local anesthetic to achieve sympathetic blockade. Post-procedure monitoring assesses for Horner syndrome, airway or respiratory compromise, hemodynamic stability, and pain improvement. The procedure may be repeated serially or used diagnostically to predict response to more definitive sympathetic neurolysis or neuromodulation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation or professional portion of a split-billed service (rare for this procedure). |
50 | Bilateral procedure | Use when bilateral stellate ganglion blocks are performed during the same session. |
51 | Multiple procedures | Use when multiple distinct procedures are billed on the same day in addition to the block. |
52 | Reduced services | Use when the procedure is partially reduced or not completed as planned. |
53 | Discontinued procedure | Use when the procedure is started but terminated due to extenuating circumstances (e.g., patient instability). |
59 | Distinct procedural service | Use to indicate a separate and distinct service from other procedures performed the same day (e.g., diagnostic injection vs unrelated procedure). |
62 | Two surgeons | Use when two surgeons work together as co-surgeons (rare for this block). |
76 | Repeat procedure by same physician | Use when the same physician repeats the procedure later the same day (note: 76 is not in the provided list; omitted). |
78 | Return to OR for postoperative care | Use when a return to the operating room is required for complications (applicable if the block is done in OR setting and return occurs). |
RT | Right side | Use to identify the right-sided procedure when laterality needs notation. |
LT | Left side | Use to identify the left-sided procedure when laterality needs notation. |
AS | Ambulatory surgical center | Use to indicate service provided in an ambulatory surgical center setting when required by payer. |
59 | Distinct procedural service | (Duplicate entry avoided) |
GA | Waiver of liability statement on file | Use when a payer requires a signed ABN-like waiver for non-covered services. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207L00000X | Pain Medicine | Interventional pain specialists commonly perform stellate ganglion blocks. |
| 2084P0800X | Interventional Pain Management | Proceduralists who perform image-guided sympathetic blocks. |
| 207RH0000X | Anesthesiology | Anesthesiologists commonly perform or supervise these blocks in procedural settings. |
| 2084P0805X | Neurology (Pain-focused) | Neurologists with interventional pain training may perform sympathetic blocks. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
G90.511 | Complex regional pain syndrome I (CRPS I) of right upper limb | Primary indication for diagnostic and therapeutic stellate ganglion block for sympathetic-mediated pain. |
G90.512 | Complex regional pain syndrome I (CRPS I) of left upper limb | Same as above for left-sided symptoms. |
M79.671 | Pain in right arm | Symptom-based code used when regional pain is the presenting complaint prompting sympathetic blockade. |
M79.672 | Pain in left arm | Symptom-based code for left-sided upper extremity pain. |
R52.2 | Chronic pain, not elsewhere classified | Used for documented chronic pain syndromes being evaluated for interventional sympathetic blockade. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
64415 | Injection, anesthetic agent; transforaminal epidural injection, cervical or thoracic, single level | Performed when patients have concurrent radicular pain or to target epidural sources of upper extremity pain in the same visit. |
64490 | Injection(s), anesthetic agent and/or steroid, paravertebral facet joint; thoracic, single level | May be billed when evaluating or treating thoracic sympathetic contributors; occasionally performed in same interventional session. |
99213 | Office or other outpatient visit for the evaluation and management of an established patient | Pre- or post-procedure evaluation and routine E/M services on the same day as the procedure when appropriately documented. |
77002 | Fluoroscopic guidance for needle placement (diagnostic or therapeutic) | Guidance services used during image-guided stellate ganglion block (note: fluoroscopy guidance may be reported if distinct). |
76942 | Ultrasonic guidance for needle placement (e.g., guiding a needle into a vessel or tissue) | Ultrasound guidance used for needle placement during the block; reported when guidance is a separate billable service. |