Single Specialty Group providers in the U.S.
18 NPPES records list single specialty group as their primary taxonomy; New York and Indiana have the most per resident. 9 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 193400000X means
193400000X is the National Uniform Claim Committee code for Single Specialty, in the grouping Group. 18 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
A business group of one or more individual practitioners, all of who practice with the same area of specialization.
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 193400000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
Staten Island has the most, 2
Source: CMS NPPES, primary taxonomy 193400000X by practice city, file of Aug 9, 2026.
All 13 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| Georgia | 1 | 0.0 |
| Indiana | 2 | 0.0 |
| Maryland | 2 | 0.0 |
| Massachusetts | 1 | 0.0 |
| Michigan | 1 | 0.0 |
| Missouri | 1 | 0.0 |
| New Jersey | 2 | 0.0 |
| State | Records | Per 100,000 |
|---|---|---|
| New Mexico | 1 | 0.0 |
| New York | 3 | 0.0 |
| North Carolina | 1 | 0.0 |
| Ohio | 1 | 0.0 |
| Oklahoma | 1 | 0.0 |
| Washington | 1 | 0.0 |
In federal data
- NUCC code193400000X · Single Specialty
- Size rank644th of 688 specialties by records (0% of all)
- Part D prescribers9 (50% of records)
- Part D claims549 a year per prescriber, on average (163rd of 496)
- Industry payments8 physicians paid $5K in 2024, $604 each on average
- Concentration4 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 single specialty group records
- James Cato, MDAugusta, GA1679681183
- Suhail Khadra, MDMunster, IN1487603239
- James Hayes, MDRichmond, IN1518075597
- Dermot Jinks, D.C.Peabody, MA1528161817
- Dustin Yoon, M.D., M.S.Germantown, MD1073839833
- Xiao-Chun Sharon Yang, MDSilver Spring, MD1932162278
- Archana Tiwari, DPTTroy, MI1760858229
- James LecluyseKansas City, MO1396099016
- Wayne Yang, MDCharlotte, NC1730319336
- Steven Greenstein, MDTeaneck, NJ1255627501
- William Sugarmann, M.D.Somerville, NJ1982717880
- Vivian Giudice, MDAlbuquerque, NM1174617542
Registry order, not a ranking. Search by name to find one provider.
Common questions
Why is Single Specialty Group a thin NUCC code in NPPES?
Only 18 NPIs list Single Specialty Group as primary taxonomy across 13 states (peak New York, 3). That is 644th 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 Single Specialty Group NPIs in Open Payments look unusual?
CMS Open Payments 2024 lists 8 paid Single Specialty Group physicians totaling $5K (113 payments; average $604, 272nd 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 Single Specialty Group NPIs, 9 appear in the Medicare Part D Prescriber PUF (average 549 claims and $86K drug cost per prescriber; 163rd 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.