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 41 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. Herlanders Williams, MDOrland Park, IL 604671538160148
  2. Jackie Williams, M.D.Forest Park, IL 601301285071738
  3. Jeffrey Williams, D.O.New Lenox, IL 604511134328644
  4. Katherine Williams, MDSkokie, IL 600771396242053
  5. Margaret Williams, MDChicago, IL 606371346875481
  6. Rebecca Williamson, DONaperville, IL 605401144857590
  7. Roland Williby, M.D.Elgin, IL 601231235439514
  8. Lanny Wilson, MDHinsdale, IL 605211699726562
  9. Tiffany Wilson, M.D.Orland Park, IL 604671609193077
  10. Joel Winer, M.D.Evanston, IL 602011093162133
  11. Daniel Winkelman, MDElk Grove Village, IL 600071033284526
  12. Michelle Winter, MDDowners Grove, IL 605151932513066
  13. Sarah Winter, M.D.Urbana, IL 618011316258056
  14. William Winter, MDMaywood, IL 601531255081303
  15. Summer Wirth, M.D.Downers Grove, IL 605151932342466
  16. Sharon WiseChicago, IL 606111427255652
  17. Nicole Witte, MDSt Charles, IL 601741215936729
  18. Randy Wittman, MDWinfield, IL 601901023165644
  19. Kimberly Wojciechowski, MDChicago, IL 606081811947690
  20. Karen Wolowick, DODowners Grove, IL 605151760644090
  21. Sung Yun Won, MDChicago, IL 606251295720829
  22. Sarah Wong, MDVernon Hills, IL 600611972504306
  23. Deborah Woodard, M.D.Quincy, IL 623011740204528
  24. Carmen Woods, MDPark City, IL 600851962402065
  25. William Woods, MDPark City, IL 600851124028196
  26. Elliot Wool, M.D.Swansea, IL 622261043302011
  27. Therese Wos, M.D.Park Ridge, IL 600681053360610
  28. Lia Wrenn, MDChicago, IL 606121700128113
  29. Erin Wright, MDMaryville, IL 620621922307115
  30. Kimberly Wright, M.D.Lisle, IL 605321083784227
  31. Alison Wu, M.D.Chicago, IL 606111548422744
  32. Daniel Ing-Hsu Wu, M.D.Chicago, IL 606161821074246
  33. Saroja Yalamanchili, MDBourbonnais, IL 609141124077326
  34. Janeta Yancheva, DOChicago, IL 606571376393470
  35. Albert Yang, MDLibertyville, IL 600481902192230
  36. Linda Yang, MDChicago, IL 606111114974557
  37. Sen-Lian Yang, MDOak Lawn, IL 604531568573210
  38. Lawrence Yeager, M.D.Chicago, IL 606111508022104
  39. Walter Yee, D.O.Belleville, IL 622231376751529
  40. Esmond Yen, MDWoodridge, IL 605171285698100
  41. Elizabeth Yepez, MDOrland Park, IL 604671518108059
  42. Bahar Yilmaz, MDChicago, IL 606111972063683
  43. Ranae Yockey, DOArlington Heights, IL 600051073509451
  44. Sloane York, MDChicago, IL 606121457503682
  45. Sarah Young, MDChampaign, IL 618201477630523
  46. Casey Younkin, M.D.Springfield, IL 627021659352656
  47. Mario Yu, MDOak Brook, IL 605231629029061
  48. Abbey ZacharskiHoffman Estates, IL 601691639871163
  49. Rita Zafra, MDChicago, IL 606391003080847
  50. Ricca Zaino, MDWoodstock, IL 600981558418947

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.