Electrodiagnostic Medicine Taxonomy Code 204R00000X
Electrodiagnostic medicine is the medical subspecialty that applies neurophysiologic techniques to diagnose, evaluate, and treat patients with impairments of the neurologic, neuromuscular, and/or muscular systems. Qualified physicians are trained in performing electrophysiological testing and interpretation of the test data. They require knowledge in anatomy, physiology, kinesiology, histology, and pathology of the brain, spinal cord, autonomic nerves, cranial nerves, peripheral nerves, neuromuscular junction, and muscles. They must know clinical features and treatment of diseases of the central, peripheral, and autonomic nervous systems, as well as those of neuromuscular junction and muscle. Physicians also require special knowledge about electric signal processing, including waveform analysis, electronics and instrumentation, stimulation and recording equipment, and statistics.
Code Details for 204R00000X
About Taxonomy Code 204R00000X
The taxonomy code 204R00000X identifies Electrodiagnostic Medicine within the Allopathic & Osteopathic Physicians provider grouping. It is a Level II — Classification code, which names a provider's occupation or service within the broader provider grouping.
NPI records show 819 registered providers whose primary or secondary taxonomy is this code. Of these, 659 (80%) are registered as organizations and 160 (20%) as individual providers. The states with the most electrodiagnostic medicine providers are Texas (423), California (57), Oklahoma (36).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-07-12T00:00:00.
View all 819 providersElectrodiagnostic Medicine Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
Frequently Asked Questions
204R00000X questionsNPPES lists 819 registered providers with this taxonomy code (Electrodiagnostic Medicine).
Both. About 80% of these providers are registered as organizations and 20% as individuals.
This taxonomy code does not map to a Medicare specialty code in the current crosswalk.
It is a Level II - Classification code in the NUCC Health Care Provider Taxonomy set.
Use the "Providers by state" directory on this page to open the list of electrodiagnostic medicine providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 26.0. Provider counts from NPPES. See nucc.org.