Electrodiagnostic services in the United States.

Area of Science:

• Neurology
• Physical Medicine and Rehabilitation
• Health Services Research

Background:

• Electrodiagnostic services are crucial for diagnosing neurological and musculoskeletal conditions.
• Understanding provider patterns is essential for assessing service delivery and quality.

Purpose of the Study:

• To characterize patterns of electrodiagnostic service provision in the United States.
• To identify the types of providers delivering electrodiagnostic services and their relative contributions.

Main Methods:

• Analysis of electrodiagnostic claims data from the 1998 MarketScan Commercial Claims & Encounters Database.
• Identification of claims using CPT codes for nerve conduction studies, electromyography, and somatosensory evoked potentials.
• Categorization of providers into physician (neurologists, physiatrists) and nonphysician (physical therapists, podiatrists) groups.

Main Results:

• Over 48,000 electrodiagnostic encounters were analyzed.
• Neurologists (23.6%) and physiatrists (22%) were the leading physician providers.
• Physiatrists demonstrated the highest performance rate (886.3 studies per 100 physiatrists).
• Nonphysician providers accounted for 16.9% of studies, with physical therapists (9.3%) and podiatrists (5.5%) being most common.
• Physician providers had more claims per encounter (median 3) than nonphysicians (median 1).

Conclusions:

• Physicians, especially neurologists and physiatrists, are the primary providers of electrodiagnostic services.
• A notable proportion of electrodiagnostic studies are performed by nonphysician providers.
• The limited scope of testing by nonphysicians raises concerns regarding the quality of electrodiagnostic care.
• Further research is needed to address potential quality issues in electrodiagnostic service provision.