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 28 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. Tammy Novak, MDArlington Hts, IL 600041376658682
  2. Mary Jane Nowak, M.D.Oak Lawn, IL 604531134430051
  3. Sasha NuhnPark Ridge, IL 600681063117109
  4. Kenneth NunesChicago, IL 606371861422503
  5. James Nunn, MDChicago, IL 606081295748242
  6. Elizabeth Nye, M.D.River Forest, IL 603051356356166
  7. Shai NyiPontiac, IL 617641073606323
  8. Amanda O'Brien, MDSpringfield, IL 627021184852162
  9. Jessica O'Connell, M.D.Chicago, IL 606111164784559
  10. Patricia O'Leary, MDGlenview, IL 600251629036983
  11. Charlotte O'Sullivan, MDHoffman Estates, IL 601691487455416
  12. Lorna O'Young, M.D.Belleville, IL 622231922287630
  13. Danielle Obiri, MD, MPHChicago, IL 606111548069743
  14. Jessica OcampoElk Grove Village, IL 600071619409067
  15. Daisy Oceguera, MDPark Ridge, IL 600681053105825
  16. Victoria Ochoa, DOMorris, IL 604501396907606
  17. Rebecca Ochs-MercerChicago, IL 606111124400643
  18. Therese Oconnor, MDDes Plaines, IL 600161114995800
  19. Stewart Odell, MDSt Charles, IL 601751407943053
  20. Nkechinyelum OguChicago, IL 606111760942189
  21. Bamidele Ogunleye, M.D.Bloomington, IL 617011831209584
  22. Elizabeth Oh, M.D.Lake Forest, IL 600451952322554
  23. Ayotomiwa Ojo, MD, MPPChicago, IL 606111568112456
  24. Jamilah Okoe, MDSouth Elgin, IL 601771871814061
  25. Philip Okwuje, MDChicago, IL 606081912958778
  26. Jeffrey Olejnik, MDJacksonville, IL 626501598727620
  27. Sarah Oliver, MDChicago, IL 606121679102453
  28. Rosanna Olofsson, DODekalb, IL 601151922093178
  29. Christopher Olson, MDNaperville, IL 605401265422448
  30. Kathryn Omalley, DOElgin, IL 601231306460860
  31. Brenda Onia, M.D.Chicago, IL 606301710936687
  32. Obioma Oparanozie, MDChicago, IL 606491255659751
  33. Vanessa Orlando CastellanosMaywood, IL 601531104685312
  34. Osaretin Oronsaye, M.D.Chicago, IL 606081093701575
  35. Fabio Ortega, M.D.Lincolnwood, IL 607121215053517
  36. Nicole Orwar, D.O.Mokena, IL 604481396989422
  37. Rebekah Osgood, M.D.Chicago, IL 606111013146596
  38. Leslie Oshin, M.D.Lake Forest, IL 600451326023698
  39. Aladeyemi Osho, MDEvergreen Park, IL 608051558941377
  40. Ismail Oshogwemoh, D.O.Urbana, IL 618011053626705
  41. Jennie Ou, MDSkokie, IL 600761972921401
  42. David Ouyang, MDEvanston, IL 602011821043944
  43. Larry Overcash, M.D.Peoria, IL 616141639136484
  44. Markel Owens, M.D.Maryville, IL 620621659572451
  45. Samantha Pace, MDChicago, IL 606371073845426
  46. Adelaide Packard, MDTinley Park, IL 604871437512811
  47. William Padgett, MDOlney, IL 624501225046253
  48. Vincenzo Padovano, MDLibertyville, IL 600481851376032
  49. Elizabeth Paganessi, MDMaywood, IL 601531548754518
  50. Cynthia Page, MDElmhurst, IL 601261295786366

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.