Electrodiagnostic Medicine Physician providers in the U.S.
17 NPPES records list electrodiagnostic medicine physician as their primary taxonomy; Arkansas and California have the most per resident. 7 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 204R00000X means
204R00000X is the National Uniform Claim Committee code for Electrodiagnostic Medicine, in the grouping Allopathic & Osteopathic Physicians. 17 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
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.
Source: NUCC Health Care Provider Taxonomy code set, definition as NUCC publishes it (nucc.org); counts from CMS NPPES.
Most per resident: the 8 highest
Source: CMS NPPES, primary taxonomy 204R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
Fayetteville has the most, 2
Source: CMS NPPES, primary taxonomy 204R00000X by practice city, file of Aug 9, 2026.
All 13 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| Arkansas | 2 | 0.1 |
| California | 2 | 0.0 |
| Connecticut | 1 | 0.0 |
| Florida | 1 | 0.0 |
| Kentucky | 1 | 0.0 |
| Michigan | 1 | 0.0 |
| Missouri | 2 | 0.0 |
| State | Records | Per 100,000 |
|---|---|---|
| New Jersey | 1 | 0.0 |
| New Mexico | 1 | 0.0 |
| New York | 1 | 0.0 |
| Texas | 1 | 0.0 |
| Washington | 2 | 0.0 |
| Wisconsin | 1 | 0.0 |
In federal data
- NUCC code204R00000X · Electrodiagnostic Medicine
- Size rank647th of 688 specialties by records (0% of all)
- Part D prescribers7 (41.2% of records)
- Part D claims413 a year per prescriber, on average (188th of 496)
- Industry payments3 physicians paid $418 in 2024, $139 each on average
- Concentration5 states hold half of all records
Source: CMS NPPES; Medicare Part D Prescriber PUF; CMS Open Payments 2024. Presence in these files is not a quality judgment.
A sample of electrodiagnostic medicine physician records
- Miles Johnson, M.D.Fayetteville, AR1811928013
- Tyler Estes, MDFayetteville, AR1912586454
- Adam OesterleSan Francisco, CA1508182239
- Carmen Hering, D.O.Albany, CA1407256993
- Muhammad Umair Nawaz, M.D.Derby, CT1891439329
- Mikaela Devaux, M.D.Orlando, FL1053727735
- William StaufferFrankfort, KY1306264189
- Mark Ziadeh, MDFarmington Hills, MI1649352543
- Amy Belville, DOSaint Joseph, MO1578594800
- Chrissa McClellan, M.D.Columbia, MO1497067250
- Ashish Shukla, M.D., M.P.H, F.A.C.CFreehold, NJ1366674889
- Lori Padilla, CNCTAlamogordo, NM1679297139
Registry order, not a ranking. Search by name to find one provider.
Common questions
Why is Electrodiagnostic Medicine Physician a thin NUCC code in NPPES?
Only 17 NPIs list Electrodiagnostic Medicine Physician as primary taxonomy across 13 states (peak Arkansas, 2). That is 647th of 688 NUCC codes by headcount. Thin codes are still searchable by NPI; do not treat the low count as a quality signal.
Do the few Electrodiagnostic Medicine Physician NPIs in Open Payments look unusual?
CMS Open Payments 2024 lists 3 paid Electrodiagnostic Medicine Physician physicians totaling $418 (10 payments; average $139, 387th of 470 by average). Presence is not a quality judgment; thin specialties often have sparse payment rows.
How much Part D prescribing does this specialty do?
Among Electrodiagnostic Medicine Physician NPIs, 7 appear in the Medicare Part D Prescriber PUF (average 413 claims and $143K drug cost per prescriber; 188th of 496 specialties by average claims). Non-prescribing clinicians in the same NUCC code are still in NPPES.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy (nucc.org); Medicare Part D Prescriber PUF; CMS Open Payments 2024. Counts are self-designated primary taxonomy, not board certification.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.