Summary & Overview
CPT 64446: Sciatic Nerve Continuous Catheter Infusion
CPT code 64446 captures continuous peripheral nerve catheter placement and infusion directed to the sciatic nerve for delivery of anesthetic agents and/or steroids. This procedure is an important component of multimodal pain management for lower-extremity surgical procedures and complex postoperative or chronic pain scenarios, with implications for inpatient and outpatient surgical care and ambulatory pain services. Nationally, appropriate coding for continuous sciatic nerve infusion affects clinical documentation, care coordination, and claims adjudication across payers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The summary addresses coverage and billing considerations that typically arise with regional continuous infusion therapies, recognizing payer-specific medical necessity policies and site-of-service rules can influence authorization and reimbursement.
Readers will find an overview of the clinical context for continuous sciatic nerve catheter infusion, typical sites of service, and common billing scenarios. The publication outlines benchmarks and policy-relevant themes such as utilization patterns, documentation expectations, and coding clarity that affect claims processing. Data not included in the input (for example, payer-specific rates or ICD-10 pairings) are noted as unavailable and will be referenced where applicable.
Billing Code Overview
CPT code 64446 describes placement of a catheter with administration of one or more anesthetic agents and/or a steroid by continuous infusion into the area of the sciatic nerve, which supplies the skin and muscles of the leg.
Service type: Continuous peripheral nerve catheter infusion (sciatic nerve)
Typical site of service: Hospital inpatient or outpatient procedure area, ambulatory surgical center, or other facility capable of regional anesthesia and continuous infusion management
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with chronic, severe right-sided sciatica refractory to conservative care presents for placement of a sciatic nerve catheter for continuous infusion of local anesthetic with or without steroid. The patient has failed multiple weeks of physical therapy, oral analgesics, and intermittent single-shot nerve blocks that provided only transient relief. Pre-procedure evaluation includes review of imaging (lumbar spine MRI showing L5–S1 foraminal stenosis with right S1 nerve root irritation), medication reconciliation, focused neurologic exam, informed consent, and assessment of anticoagulation status.
On the day of service in an ambulatory surgery center or hospital outpatient setting, the interventional pain physician performs ultrasound and/or fluoroscopy-guided perineural placement of a catheter adjacent to the sciatic nerve in the proximal thigh or gluteal region. After sterile prep, local skin anesthesia is administered, the needle is advanced to the perineural space, and a catheter is threaded for continuous infusion. Typical documentation includes indication, laterality, guided imaging modality, drugs/volumes infused, catheter type and length, procedural time, patient tolerance, and post-procedure instructions for infusion pump management and wound care. The plan often includes outpatient continuous infusion for several days to weeks with follow-up for catheter removal and pain reassessment.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Office or outpatient E/M — Normally used to indicate the service was performed in the typical setting |