NPPES file of Aug 9, 2026

Specialist in Illinois

1,154 NPPES records list specialist with a practice address in Illinois, 9 per 100,000 residents, the 35th highest rate of 51. Chicago and Evanston have the most; each record links to the provider's NPI and the Illinois license search. Page 16 of 24.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 174400000X · 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, 231

  1. Chicago231
  2. Evanston36
  3. Rockford21
  4. Freeport20
  5. Naperville20

Specialist records in Illinois

  1. Victor OdarczenkoPalatine, IL 600741366489932
  2. Annabelle Ogerio, PTBloomington, IL 617041508172099
  3. Raymond Ogren, A.T.C.Naperville, IL 605641902882640
  4. Jacek Olejniczak, CSAElk Grove Village, IL 600071629145834
  5. Timothy Olenek, D.O.Tinley Park, IL 604771720073000
  6. Brian OlsbergHampshire, IL 601401588080071
  7. Caroline Olson, M.D.Hoffman Estates, IL 601951609996131
  8. Shannon Olson, L.C.S.W.Schaumburg, IL 601941326234576
  9. Gregorio Orbeta, M.D.West Chicago, IL 601851750492401
  10. Alejandra OrtizChicago, IL 606341184283806
  11. Assunta Osterholt, IBCLCChicago Heights, IL 604111497960421
  12. Brianna Overbey, P.T.A.Alton, IL 620021134358633
  13. Kara Owens, RN-C,MS,WHNPPekin, IL 615541831269216
  14. Suzanne Pachtman, DPT, MS, HWCGlenview, IL 600251730244195
  15. Christine Pacocha, CRNASt Charles, IL 601751528248945
  16. Anjali Padhye, PTJoliet, IL 604361629387808
  17. Prem Pahwa, M.D.Chicago, IL 606221649361791
  18. Daniel Palmer, MDPeoria, IL 616031225145196
  19. Melissa Paolino, MSChicago, IL 606111457763831
  20. Andreas Papakostas, LATC, LMTPlainfield, IL 605441609832518
  21. David Papez, M.S.,A.T.,C.Arlington Heights, IL 600041306813175
  22. Deborah PappasWestchester, IL 601541164458337
  23. Carla Parch, PTWarrenville, IL 605551508810706
  24. Yogin Parikh, M.D.Coal Valley, IL 612401578542304
  25. Youngsook Park, M.D.Westchester, IL 601541831285691
  26. Anne ParkerLa Grange Park, IL 605261861677049
  27. Paul Parmet, M.D.Skokie, IL 600761336139161
  28. Maria Pasillas, M.S.Chicago, IL 606291205033776
  29. Laura Paszyna, MPTLa Grange, IL 605251356498968
  30. Ambalal Patel, MDChicago Heights, IL 604111730193905
  31. Disha Patel, MPTOrland Park, IL 604621730411232
  32. Gavish Patel, M.D.Peoria, IL 616141821080078
  33. Teresita Patino, DEVELOPMENTAL THERAPNaperville, IL 605641174574909
  34. Aurelia Peera, M.D.Chicago, IL 606461003812876
  35. Don Pellegrini, DNChicago, IL 606571689727844
  36. Judith PennChicago, IL 606521811471808
  37. Jay Pensler, M.D.Chicago, IL 606111003831322
  38. Betsy Pepper, MDChicago, IL 606141437141223
  39. Reid Perlman, M.D.Evanston, IL 602011316036825
  40. Jack Perlmutter, M.D.Lake Barrington, IL 600101578559019
  41. Kristen PerryBreese, IL 622301154162188
  42. Brittany Peshoff, MS, OTR/LGlenview, IL 600261598017998
  43. Jerry Petasnick, M.D.Chicago, IL 606121316905201
  44. Mark Peterson, NAPRAPATHRockford, IL 611081558481366
  45. Brenda Petticrew, LMTShannon, IL 610781568810331
  46. Daniel Piazza, M.D.Arlington Heights, IL 600051609964568
  47. Kathleen PicciFreeport, IL 610321164639746
  48. Angeliki Pieropoulos, PTWarrenville, IL 605551982658845
  49. Holly Pignotti, OTRLMokena, IL 604481164573572
  50. Michael Pins, M.D.Park Ridge, IL 600681639155328

Source: CMS NPPES, primary taxonomy 174400000X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 35 of 51 per resident

  1. Wyoming9
  2. Nebraska9
  3. Virginia9
  4. Illinois9
  5. Idaho9
  6. Vermont9
  7. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 174400000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

19.1% of these records appear in a Medicare file, against 17.0% 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. Illinois19.1%
  2. United States17.0%

Specialist records in Illinois, measured

  • In a Medicare file220 of 1,154 · 19.1% here, 17.0% nationally
  • In the CMS Doctors and Clinicians file127 · 11.0% here, 11.1% nationally
  • Not updated in five years or more968 · 83.9% here, 77.3% nationally
  • Median graduation year1988 · the 127 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 174400000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,154 NPPES records list specialist (174400000X) as their primary taxonomy with a practice address in Illinois: 9 per 100,000 residents against 18 nationally (50 states and D.C.). Chicago has 231 of them (20%).

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. Colorado1,105
  2. Massachusetts1,096
  3. Oregon1,085
  4. New Hampshire1,010

States with a similar rate per 100,000

  1. Virginia9.2
  2. Nebraska9.3
  3. Idaho9.0
  4. Wyoming9.4

The largest states

  1. New York22,636
  2. California5,749
  3. Florida2,685
  4. Washington2,609
  5. Pennsylvania2,031

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.