Summary & Overview
CPT 95933: Orbicularis Oculi (Blink) Reflex Electrodiagnostic Test
CPT code 95933 denotes electrodiagnostic testing of the orbicularis oculi reflex, commonly called the blink reflex. This targeted neurophysiologic study assesses reflex pathways involving cranial nerves and brainstem circuits and can inform diagnoses such as facial neuropathy, brainstem lesion, or other neuromuscular disorders. Nationally, the code matters for consistent documentation of specialized diagnostic testing that often requires trained neurophysiology staff and dedicated outpatient electrodiagnostic facilities.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise view of clinical context, coding definition, and payer coverage landscape to support billing accuracy and administrative clarity.
Readers will learn the clinical purpose of 95933, typical sites of service, how this procedure fits into electrodiagnostic service lines, and the elements that influence billing and coverage decisions. Data not available in the input will be identified as such; where available, the report summarizes common modifiers used, related service lines, and typical clinical indications that prompt testing.
Billing Code Overview
CPT code 95933 describes electrodiagnostic testing of the orbicularis oculi reflex (blink reflex). The procedure records involuntary blinking of the eyelids produced by contraction of the orbicularis oculi muscles in response to stimulation such as tapping the margin of the orbit or the bridge or tip of the nose.
Service Type: Electrodiagnostic neuromuscular testing
Typical Site of Service: Outpatient neurology clinic, hospital outpatient department, or ambulatory electrodiagnostic laboratory
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient presents to a neurodiagnostic laboratory with unilateral facial pain and abnormal eyelid closure noted by the neurologist during a focal cranial nerve exam. The neurologist orders electrodiagnostic testing of the blink reflex (95933) to evaluate the trigeminal and facial nerve pathways and to help distinguish between trigeminal neuralgia, Bell palsy, or a lesion of the brainstem. The patient is escorted to an outpatient electrophysiology suite in the neurology clinic. After informed consent, surface recording electrodes are placed over the orbicularis oculi muscles and transcutaneous stimulation is applied to the supraorbital branch of the trigeminal nerve while responses from the ipsilateral and contralateral orbicularis oculi are recorded. The procedure typically takes 15–30 minutes. The neurophysiologist interprets latency and amplitude of R1 and R2 components, documents findings in the electronic medical record, and sends results to the referring neurologist. The typical site of service is an outpatient neurodiagnostic laboratory or hospital outpatient department; the service type is diagnostic electrodiagnostic testing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician/specialist interpretation and reporting separate from technical resources. |