Summary & Overview
CPT 64400: Trigeminal Nerve Branch Injection
CPT code 64400 denotes injection of an anesthetic and/or steroid adjacent to a branch of the trigeminal (fifth cranial) nerve and is reported for each branch treated during a single procedure. This procedure is commonly used for diagnostic relief or therapeutic management of trigeminal neuralgia, facial pain, or related craniofacial pain syndromes. Nationally, proper coding of 64400 affects reimbursement, care pathways for facial pain management, and tracking of procedural utilization patterns.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, typical settings where the service is furnished, and what to expect in payer coverage considerations. The publication summarizes benchmark metrics and common billing practices, highlights relevant policy updates influencing authorization and coverage, and clarifies reporting expectations when multiple trigeminal branches are injected in one session.
Intended for practice managers, coders, and policy analysts, the content focuses on coding accuracy, billing implications when reporting per-branch injections, and the clinical scenarios in which 64400 is typically used. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 64400 describes injection of an anesthetic agent and/or steroid close to each branch of the fifth cranial (trigeminal) nerve. The trigeminal nerve has three major branches — ophthalmic, maxillary, and mandibular — and this code is reported for each branch injected during a single procedure.
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Service type: Peripheral nerve block / trigeminal nerve branch injection
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Typical site of service: Ambulatory surgical center or hospital outpatient department; may also be performed in physician office settings depending on clinical circumstances and facility capabilities
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to an outpatient pain clinic or interventional radiology suite with unilateral trigeminal neuralgia or refractory facial neuropathic pain localized to one or more divisions of the trigeminal nerve. The patient has failed or tolerated limited benefit from oral medications (e.g., carbamazepine, oxcarbazepine) and requests or is referred for a diagnostic and/or therapeutic nerve block. After consent, the patient is positioned supine or semi-reclined; topical or local skin anesthesia is applied. Under landmark guidance or fluoroscopy/ultrasound, the provider injects a local anesthetic with or without steroid adjacent to the targeted trigeminal branch (ophthalmic V1, maxillary V2, or mandibular V3). Each branch injected during the single encounter is reported separately. Typical workflow includes pre-procedure history and medication review, procedural time and documentation of laterality and specific branches treated, monitoring during a short recovery period, and post-procedure pain assessment and discharge instructions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing physician's interpretation or professional portion separate from technical services provided by another entity |
50 |