NPPES file of Aug 9, 2026

Research Study Specialist in Illinois

12 NPPES records list research study specialist with a practice address in Illinois, 0.1 per 100,000 residents, the 26th highest rate of 41. Chicago and Arlington Heights have the most; each record links to the provider's NPI and the Illinois license search.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 1744R1102X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Chicago has the most, 10

  1. Chicago10
  2. Arlington Heights1
  3. Park Forest1

Research Study Specialist records in Illinois

  1. Yuanyuan Groves, M.D.Chicago, IL 606571710149489
  2. Spring HollandChicago, IL 606371023442811
  3. Margaret HollyChicago, IL 606371083048136
  4. Liang HongChicago, IL 606121700395084
  5. Cassandra HuertaChicago, IL 606111982552022
  6. Eugene Koprowski, M.D. (A.M.)Chicago, IL 606101720352511
  7. Malcolm Lee, MD, PHD(C), CLS(AAB)Park Forest, IL 604661659805521
  8. Arlet Nedeltcheva, MDChicago, IL 606121790560613
  9. Dilip Pandey, MBBS, MS, PHDChicago, IL 606121023624764
  10. Niraj PatelArlington Heights, IL 600051659024305
  11. Robert Schleimer, PH.D.Chicago, IL 606111710322516
  12. Glen SussmanChicago, IL 606111053734830

Source: CMS NPPES, primary taxonomy 1744R1102X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 26 of 41 per resident

  1. Nebraska0.1
  2. Oklahoma0.1
  3. Alabama0.1
  4. Illinois0.1
  5. Virginia0.1
  6. Rhode Island0.1
  7. 50 states and D.C.0.1

Source: CMS NPPES, primary taxonomy 1744R1102X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

0.0% of these records appear in a Medicare file, against 4.3% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Illinois0.0%
  2. United States4.3%

Research Study Specialist records in Illinois, measured

  • In a Medicare file0 of 12 · 0.0% here, 4.3% nationally
  • In the CMS Doctors and Clinicians file0 · 0.0% here, 0.9% nationally
  • Not updated in five years or more7 · 58.3% here, 66.7% nationally

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 1744R1102X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

12 NPPES records list research study specialist (1744R1102X) as their primary taxonomy with a practice address in Illinois: 0.1 per 100,000 residents against 0.1 nationally (50 states and D.C.). Chicago has 10 of them (83%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Arizona11
  2. Georgia10
  3. Missouri10
  4. New Jersey10

States with a similar rate per 100,000

  1. Texas0.1
  2. Ohio0.1
  3. Pennsylvania0.1
  4. New York0.1

The largest states

  1. California82
  2. Florida33
  3. Texas33
  4. Maryland31
  5. Massachusetts25

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

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.