Summary & Overview
CPT 95908: Nerve Conduction Study, Three to Four Studies
Headline: CPT code 95908: Three-to-Four Nerve Conduction Studies for Peripheral Nerve Evaluation
CPT code 95908 denotes a diagnostic nerve conduction study involving three or four individual nerve conduction tests to evaluate motor and sensory nerve function. This electrodiagnostic procedure is a standard tool in diagnosing peripheral neuropathies, focal nerve injuries, and neuromuscular disorders and remains an important national clinical and billing item due to its role in guiding treatment and disability assessments.
Key payers in the national context include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical indications and typical service settings, followed by benchmarking and payment context relevant to these payers. The publication outlines typical sites of service, common billing modifiers and coding considerations, and comparisons to related electrodiagnostic services. Policy updates and payer-specific coverage themes are summarized to clarify prior authorization, documentation, and claim adjudication priorities.
This summary prepares clinicians, coders, and policy analysts to understand where 95908 fits within electrodiagnostic service lines, what to expect from payer coverage patterns, and which operational issues commonly affect billing and reimbursement for nerve conduction studies.
Billing Code Overview
CPT code 95908 describes a diagnostic nerve conduction study in which the provider performs three or four nerve conduction studies to evaluate the electrical conduction of motor and sensory nerves. This procedure assesses nerve function and helps diagnose neuropathies, nerve injuries, and other peripheral nerve disorders.
Service Type
- Diagnostic electrodiagnostic testing
Typical Site of Service
- Outpatient clinic or hospital outpatient department
- Electrodiagnostic laboratory
- Specialty neurology or physiatry clinic
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Clinical & Coding Specifications
Clinical Context
A patient presents to an outpatient electrodiagnostic laboratory or neurology clinic with progressive numbness, tingling, and weakness in the upper or lower extremities. The referring clinician suspects a peripheral neuropathy, nerve entrapment (such as carpal tunnel syndrome), or radiculopathy. The patient history includes symptom onset, distribution, prior injuries, diabetes, thyroid disease, or chemotherapy exposure. Physical examination documents sensory deficits, muscle weakness, or reflex changes.
The clinical workflow includes: referral and preauthorization as needed; review of relevant medical history and medications; focused neurological examination; informed consent for electrodiagnostic testing; performance of nerve conduction studies (NCS) including three to four individual nerve conduction studies per 95908 to evaluate motor and sensory nerve function; recording and interpretation by a qualified physician or technologist under physician supervision; documentation of findings, impression, and recommendations; and communication of results to the referring provider. Typical site of service is an outpatient electrodiagnostic laboratory, neurology clinic, or hospital outpatient department. Typical patient scenario: a 52-year-old patient with 6 months of nocturnal hand numbness and thenar weakness referred for NCS to evaluate median neuropathy at the wrist.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 |