James Stewart Nitti, M.D.
Obstetrics & Gynecology Physician · Oak Park, IL
James Stewart Nitti, M.D. is an obstetrics & gynecology physician with a practice address in Oak Park, Illinois, and NPI 1194106872, issued on Jun 17, 2015. Check the license (Illinois 036146394, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- James Stewart Nitti
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036146394 IL
Self-reported in NPPES; status is on the state search - Practice location
- 932 Lake St Ste 300, Oak Park, IL 60301
- Phone
- (331) 221-1700
- Enumerated
- Jun 17, 2015
- Record last updated
- Feb 23, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (331) 221-2729
- Medicare enrollment
- Enrolled (PECOS I20190910001709); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 932 Lake St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vasant Acharya, M.D.Obstetrics & Gynecology Physician1124035944
- Elaine Biester, M.D.Obstetrics & Gynecology Physician1841300464
- Lisa Chorzempa-Schainis, M.D.Obstetrics & Gynecology Physician1629085444
- Michael Palash, D.O.Family Medicine Physician1881048767
- Sandra Pena, MDFamily Medicine Physician1932563996
- Alison Sage, D.O.Family Medicine Physician1427495241
Verify James Stewart Nitti in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036146394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
55 Medicare Part D claims for 23 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 91.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,113.98
12 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Endeavor Health Medical GroupElmhurst, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Stewart Nitti among 2,062 obstetrics & gynecology physician records in Illinois
James Stewart Nitti, M.D. is one of 2,062 obstetrics & gynecology physician records with a practice address in Illinois. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 72% of them.
- NPI issued2015 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2015 · median 2006 among the 1,168 with a school on file
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Illinois
There are 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Oak Park → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Vasant Acharya, M.D.Oak Park, IL 603011124035944
- Elaine Biester, M.D.Oak Park, IL 603011841300464
- Lisa Chorzempa-Schainis, M.D.Oak Park, IL 603011629085444
- Ruth Dubyel, D.O.Oak Park, IL 603011134408446
- Kenneth Bray, MDOak Park, IL 603021740295161
- Monique Brotman, D.O.Oak Park, IL 603021447395108
- Devyani Chawla, MDOak Park, IL 603021861915969
- Bertha Lopez, MDOak Park, IL 603021578582979
Common questions
What is James Stewart Nitti, M.D.'s NPI number?
James Stewart Nitti, M.D.'s National Provider Identifier (NPI) is 1194106872, issued on Jun 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is James Stewart Nitti, M.D. located?
The NPPES record lists a practice address at 932 Lake St Ste 300, Oak Park, IL, 60301. Phone: (331) 221-1700. Providers update this record themselves, so call before visiting.
How can I verify James Stewart Nitti, M.D.'s license?
NPPES lists Illinois license number 036146394, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Stewart Nitti, M.D. prescribe under Medicare Part D?
In 2024, James Stewart Nitti, M.D. had 55 Medicare Part D claims for 23 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is James Stewart Nitti, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it 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.