NPPES file of Aug 9, 2026

Research Study Specialist in Maryland

31 NPPES records list research study specialist with a practice address in Maryland, 0.5 per 100,000 residents, the 2nd highest rate of 41. Baltimore and Bethesda have the most; each record links to the provider's NPI and the Maryland 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).

Baltimore has the most, 9

  1. Baltimore9
  2. Bethesda8
  3. Rockville5
  4. Frederick2
  5. Largo2

Research Study Specialist records in Maryland

  1. Grace AdumanisaLargo, MD 207741104663145
  2. Konstantinia Almpani, DDS, MSCBethesda, MD 208141285113522
  3. Sam AnkrahBeltsville, MD 207051508279373
  4. James Battey, M.D.Bethesda, MD 208921104135540
  5. Rodney Berrios, MD, MPHBethesda, MD 208921083069710
  6. Chee Chia, M.D.Baltimore, MD 212251528128188
  7. Denise Clizbe, RN, CCRCFrederick, MD 217021073690020
  8. Robert Conley, M.D.Baltimore, MD 212281962524280
  9. Suk De Ravin, M.D., PHD.Bethesda, MD 208961629394333
  10. Mitchell Gail, M.D., PH.D.Rockville, MD 208501699183525
  11. David Goldstein, MD, PHDBethesda, MD 208921073638615
  12. Stephen Hoffman, M.D., D.T.M.H., CAPTRockville, MD 208501841597051
  13. Khurram Janjua, M.D.Rockville, MD 208521336657899
  14. Masaru Kaneko, MDBaltimore, MD 212011255611885
  15. Aparna Kishor, MD, PHDChevy Chase, MD 208151598183006
  16. Mark Knepper, MD, PHDKensington, MD 208951972935880
  17. Seungbok Lee, MD, MPHBaltimore, MD 212011841483401
  18. Robert Litman, M.D.Rockville, MD 208501114041274
  19. Jeremy MiddletonPrince Frederick, MD 206781538757877
  20. Louis Miller, MDRockville, MD 208521356611933
  21. Muhammad Mohiuddin, MBBSBaltimore, MD 212011497692404
  22. Kazzmine MosesGaithersburg, MD 208791144078411
  23. Bethany MundisBaltimore, MD 212011477659415
  24. Laura OfiaraLargo, MD 207741134951841
  25. Alen Ostojic, MDBethesda, MD 208921255975454
  26. Mikhail PletnikovBaltimore, MD 212871578335808
  27. Helene Rosenberg, M.D.Bethesda, MD 208921942448758
  28. Maryanne Sacco-Peterson, OTR/LBethesda, MD 208921053542316
  29. Tim Shi, MD, PHDFrederick, MD 217041396696902
  30. Ik Lin Tan, MBBSBaltimore, MD 212871053633388
  31. Bert Vogelstein, M.D.Baltimore, MD 212871801183959

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

Maryland ranks 2 of 41 per resident

  1. District of Columbia0.7
  2. Maryland0.5
  3. Minnesota0.4
  4. Massachusetts0.4
  5. 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.

9.7% 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. Maryland9.7%
  2. United States4.3%

Research Study Specialist records in Maryland, measured

  • In a Medicare file3 of 31 · 9.7% here, 4.3% nationally
  • In the CMS Doctors and Clinicians file0 · 0.0% here, 0.9% nationally
  • Not updated in five years or more23 · 74.2% 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

31 NPPES records list research study specialist (1744R1102X) as their primary taxonomy with a practice address in Maryland: 0.5 per 100,000 residents against 0.1 nationally (50 states and D.C.). Baltimore has 9 of them (29%).

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. Florida33
  2. Texas33
  3. Massachusetts25
  4. New York25

States with a similar rate per 100,000

  1. Minnesota0.4
  2. Colorado0.3
  3. California0.2
  4. Missouri0.2

The largest states

  1. California82
  2. Florida33
  3. Texas33
  4. Massachusetts25
  5. New York25

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.