Research Study Specialist providers in the U.S.
469 NPPES records list research study specialist as their primary taxonomy, about 0.1 per 100,000 residents; District of Columbia and Maryland have the most per resident. 12 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 1744R1102X means
1744R1102X is the National Uniform Claim Committee code for Specialist, Research Study, in the grouping Other Service Providers. 469 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
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 1744R1102X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
New York has the most, 15
Source: CMS NPPES, primary taxonomy 1744R1102X by practice city, file of Aug 9, 2026.
All 41 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| Alabama | 5 | 0.1 |
| Arizona | 11 | 0.1 |
| Arkansas | 2 | 0.1 |
| California | 82 | 0.2 |
| Colorado | 15 | 0.3 |
| Connecticut | 6 | 0.2 |
| Delaware | 3 | 0.3 |
| District of Columbia | 5 | 0.7 |
| Florida | 33 | 0.1 |
| Georgia | 10 | 0.1 |
| Hawaii | 1 | 0.1 |
| Idaho | 1 | 0.1 |
| Illinois | 12 | 0.1 |
| Indiana | 4 | 0.1 |
| Iowa | 8 | 0.2 |
| Kansas | 5 | 0.2 |
| Kentucky | 3 | 0.1 |
| Louisiana | 4 | 0.1 |
| Maryland | 31 | 0.5 |
| Massachusetts | 25 | 0.4 |
| Michigan | 6 | 0.1 |
| State | Records | Per 100,000 |
|---|---|---|
| Minnesota | 22 | 0.4 |
| Missouri | 10 | 0.2 |
| Montana | 1 | 0.1 |
| Nebraska | 2 | 0.1 |
| Nevada | 5 | 0.2 |
| New Jersey | 10 | 0.1 |
| New York | 25 | 0.1 |
| North Carolina | 16 | 0.1 |
| Ohio | 14 | 0.1 |
| Oklahoma | 4 | 0.1 |
| Oregon | 2 | 0.0 |
| Pennsylvania | 16 | 0.1 |
| Rhode Island | 1 | 0.1 |
| South Carolina | 1 | 0.0 |
| Tennessee | 5 | 0.1 |
| Texas | 33 | 0.1 |
| Utah | 5 | 0.1 |
| Virginia | 8 | 0.1 |
| Washington | 9 | 0.1 |
| Wisconsin | 3 | 0.1 |
In federal data
- NUCC code1744R1102X · Specialist
- Size rank343rd of 688 specialties by records (0.01% of all)
- In its family3rd of 5 Specialist codes, 0.7% of the family
- Part D prescribers12 (2.6% of records)
- Part D claims309 a year per prescriber, on average (224th of 496)
- Industry payments14 physicians paid $59K in 2024, $4K each on average
- Concentration7 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 research study specialist records
- Vicente Elorrieta Decombe, MDBirmingham, AL1528916335
- John Higginbotham, PHD, MPHTuscaloosa, AL1538411368
- John MillsDecatur, AL1750258091
- Alicia Williams, RMAHuntsville, AL1780355347
- Melanie Dumas, AMFrankville, AL1194302760
- Resat UnalLittle Rock, AR1053507053
- Yinan YangLittle Rock, AR1295055051
- Christopher Smith, PH.D.Phoenix, AZ1093145823
- Mariley Segrera-GrabaniaMesa, AZ1386421063
- Bruce GrantScottsdale, AZ1437342359
- Stanna CalderonScottsdale, AZ1528908241
- Despina HardyTempe, AZ1538439914
Registry order, not a ranking. Search by name to find one provider.
Common questions
How should I read Research Study Specialist's mid-pack national roster?
469 CMS-registered Research Study Specialist providers sit across 42 states; California leads with 82. Rank 343rd of 688 NUCC specialties by headcount.
How does Research Study Specialist show up in Open Payments mid-pack?
CMS Open Payments 2024 lists 14 Research Study Specialist physicians receiving $59K across 118 payments (average $4K; 102nd of 470 specialties). Not a quality score.
How much Part D prescribing does this specialty do?
Among Research Study Specialist NPIs, 12 appear in the Medicare Part D Prescriber PUF (average 309 claims and $940K drug cost per prescriber; 224th 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.