NPPES file of Aug 9, 2026

Obstetrics & Gynecology Physician in Illinois

2,062 NPPES records list obstetrics & gynecology physician with a practice address in Illinois, 16 per 100,000 residents, the 8th highest rate of 51. Chicago and Springfield have the most; each record links to the provider's NPI and the Illinois license search. Page 35 of 42.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207V00000X · 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, 700

  1. Chicago700
  2. Springfield68
  3. Park Ridge56
  4. Naperville48
  5. Maywood40

Obstetrics & Gynecology Physician records in Illinois

  1. Kenneth Siegel, MDBloomingdale, IL 601081902874266
  2. Don Sielaff, M.D.Lincoln, IL 626561144320839
  3. Jacqueline Sieros, MD, MPHBannockburn, IL 600151699012526
  4. Carlos Sierra-Rodriguez, M.D.Mattoon, IL 619381700865268
  5. Whitney Sigala, M.D.Orland Park, IL 604671124373295
  6. Jennifer Silk, DONaperville, IL 605401255890414
  7. Gayle Simmons, MDDowners Grove, IL 605161154482024
  8. Stephanie Simmons, M.D.Aurora, IL 605041346236585
  9. Charla Simon, MDLincolnwood, IL 607121700890969
  10. Julia Simon, M.D.Chicago, IL 606371609139393
  11. Melissa Simon, MDChicago, IL 606111861580383
  12. Sherrone Simon, M.D.Melrose Park, IL 601601992840094
  13. Linda Simon-PriceChicago, IL 606081659484871
  14. Jon Simonelli, M.D.Chicago, IL 606571750391132
  15. Leslie Simonton-Smith, M.D.Mount Vernon, IL 628641417023284
  16. Raven Simpson, DNP, WHNP-BCNew Lenox, IL 604511861341968
  17. Kalpana Singh, MDChicago, IL 606091073697934
  18. Sevgi Sipahi, M.D.Park Ridge, IL 600681093132235
  19. Katherine Sisco, MDChicago, IL 606221497969935
  20. Claudia SittlerChicago, IL 606121710060835
  21. Colleen Skay, MD, MA, BS, BALombard, IL 601481669767174
  22. Stephanie Skelly, MDWaterloo, IL 622981649274382
  23. Gordon SkeochChicago, IL 606181457858094
  24. Jodi Sklansky, D.O.Des Plaines, IL 600161548553399
  25. Brian Sklar, M.D.Downers Grove, IL 605151740270024
  26. Kimberly SladekMaywood, IL 601531396484564
  27. Stuart Slaw, M.D.Lake Forest, IL 600451700821154
  28. Sara Slezak, D.O.Chicago, IL 606081285128926
  29. Barry Slotky, MDBloomington, IL 617011932194834
  30. Kathleen Slugocki, D.O.Mokena, IL 604481619157526
  31. Bruce Smith, M.D.Streator, IL 613641063437150
  32. Carrie SmithChicago, IL 606371477664456
  33. Jamiere Smith, M.D.Chicago, IL 606281720042922
  34. Michael Smith, M.D.Champaign, IL 618201952319667
  35. Pamela Smith, MDChicago, IL 606231821060039
  36. Richard Smith, MDBarrington, IL 600101346223179
  37. Tamara Smith, D.O.Macomb, IL 614551932118239
  38. Zhana SmithChicago, IL 606371851979678
  39. Karlie SneadChicago, IL 606571265174056
  40. Julie Snow, M.D.Des Plaines, IL 600161154348720
  41. Jenna Sobczyk, MDMaywood, IL 601531821936758
  42. Michael Socol, MDChicago, IL 606111104833219
  43. Irma Sodini, M.D.Chicago, IL 606571316956873
  44. Brianna Sohl, MDPark Ridge, IL 600681083293435
  45. Pekka Soini, M.D.Chicago, IL 606231225176639
  46. Ana-Maria Soleanicov, MDRockford, IL 611071508841701
  47. Michael Solotke Md, MDChicago, IL 606111790362978
  48. Jonathan Song, M.D.Geneva, IL 601341851452775
  49. Mia Song, MDChicago, IL 606021952367468
  50. Yevgeniya Sorokin, MDElk Grove Village, IL 600071497051239

Source: CMS NPPES, primary taxonomy 207V00000X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 8 of 51 per resident

  1. Michigan18
  2. New Hampshire17
  3. Maryland17
  4. Illinois16
  5. Alaska16
  6. New York16
  7. 50 states and D.C.14

Source: CMS NPPES, primary taxonomy 207V00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

72.4% of these records appear in a Medicare file, against 75.6% 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. Illinois72.4%
  2. United States75.6%

Obstetrics & Gynecology Physician records in Illinois, measured

  • In a Medicare file1,492 of 2,062 · 72.4% here, 75.6% nationally
  • In the CMS Doctors and Clinicians file1,168 · 56.6% here, 60.3% nationally
  • Not updated in five years or more1,043 · 50.6% here, 56.2% nationally
  • Median graduation year2006 · the 1,168 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207V00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,062 NPPES records list obstetrics & gynecology physician (207V00000X) as their primary taxonomy with a practice address in Illinois: 16 per 100,000 residents against 14 nationally (50 states and D.C.). Chicago has 700 of them (34%).

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. Pennsylvania1,974
  2. Michigan1,776
  3. Ohio1,572
  4. North Carolina1,548

States with a similar rate per 100,000

  1. Alaska16.2
  2. New York16.2
  3. Maryland16.7
  4. Massachusetts16.1

The largest states

  1. California5,088
  2. Texas3,524
  3. New York3,174
  4. Florida2,601
  5. Pennsylvania1,974

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.