James Benjamin Grossweiner, M.D.
Dermatology Physician · Naperville, IL
James Benjamin Grossweiner, M.D. is a dermatology physician with a practice address in Naperville, Illinois, and NPI 1437114907, issued on Apr 19, 2006. Check the license (Illinois 036-074040, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- James Benjamin Grossweiner
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 036-074040 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1220 Hobson RD Ste 116, Naperville, IL 60540
- Phone
- (630) 355-6660
- Enumerated
- Apr 19, 2006
- Record last updated
- Jul 18, 2022
- Fax
- (630) 527-2856
- Medicaid ID
- 036074040 IL
- Medicare enrollment
- Enrolled (PECOS I20101223000162); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1985
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 647 in Illinois → Look up another NPI →
Also registered at 1220 Hobson RD Ste 116
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wayne Blaszak, M.D.Dermatology Physician1245294008
Verify James Benjamin Grossweiner 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 036-074040Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average dermatology physician in 2024
732 Medicare Part D claims for 281 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Triamcinolone Acetonide72 claims
- Mometasone Furoate56 claims
- Fluocinonide45 claims
- Clindamycin Phosphate44 claims
- Desonide44 claims
- Metronidazole44 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).
James Benjamin Grossweiner among 647 dermatology physician records in Illinois
James Benjamin Grossweiner, M.D. is one of 647 dermatology physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 65% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1985 · median 2008 among the 440 with a school on file
- Record last updated2022 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Illinois
There are 647 dermatology physician records in Illinois.
All 647 in Illinois → Every provider in Naperville → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Juliana Basko-Plluska, M.D.Naperville, IL 605401295086742
- Wayne Blaszak, M.D.Naperville, IL 605401245294008
- Maria EspinosaNaperville, IL 605401114506573
- Andia Renz, MDNaperville, IL 605401578191391
- Sophia Welykyj, MDRiverside, IL 605461619985355
- Jessie Cheung, MDWillowbrook, IL 605271760598759
- Eden Lake, M.D.La Grange Park, IL 605261578904892
- Shelley Halper, M.D.La Grange Highlands, IL 605251922034065
Common questions
What is James Benjamin Grossweiner, M.D.'s NPI number?
James Benjamin Grossweiner, M.D.'s National Provider Identifier (NPI) is 1437114907, issued on Apr 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Benjamin Grossweiner, M.D. located?
The NPPES record lists a practice address at 1220 Hobson RD Ste 116, Naperville, IL, 60540. Phone: (630) 355-6660. Providers update this record themselves, so call before visiting.
How can I verify James Benjamin Grossweiner, M.D.'s license?
NPPES lists Illinois license number 036-074040, 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 Benjamin Grossweiner, M.D. prescribe under Medicare Part D?
In 2024, James Benjamin Grossweiner, M.D. had 732 Medicare Part D claims for 281 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is James Benjamin Grossweiner, 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.