Gregory S. Doren, M.D.
Ophthalmology Physician · Chicago, IL
Gregory S. Doren, M.D. is an ophthalmology physician with a practice address in Chicago, Illinois, and NPI 1851411847, issued on Mar 31, 2007. Check the license (Illinois 036079629, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gregory S. Doren
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 036079629 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3000 N Halsted St, Chicago, IL 60657
- Phone
- (773) 935-2800
- Enumerated
- Mar 31, 2007
- Record last updated
- Dec 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (773) 935-2861
- Medicaid ID
- 036079629 IL
- Medicare enrollment
- Enrolled (PECOS I20060118000193); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1985
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 3000 N Halsted St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory S. Doren 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 036079629Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% more Medicare Part D claims than the average ophthalmology physician in 2024
2,069 Medicare Part D claims for 448 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Latanoprost678 claims
- Prednisolone Acetate228 claims
- Dorzolamide Hcl188 claims
- Erythromycin166 claims
- Timolol Maleate165 claims
- Ketorolac Tromethamine117 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.
Gregory S. Doren among 898 ophthalmology physician records in Illinois
Gregory S. Doren, M.D. is one of 898 ophthalmology physician records with a practice address in Illinois. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 36% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1985 · median 1999 among the 551 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Illinois
There are 898 ophthalmology physician records in Illinois.
All 898 in Illinois → Every provider in Chicago → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Ema AvdagicChicago, IL 606571497287148
- Andrea Birnbaum, MD, PHDChicago, IL 606571912171364
- Kelley Bohm, M.D.Chicago, IL 606571609238443
- Joseph Garber, MDChicago, IL 606571306910542
- Barry Herst, MDChicago, IL 606571295809259
- Brian Herst, M.D.Chicago, IL 606571801235734
- Gina Rogers, M.D.Chicago, IL 606571609042902
- Bryan Traubert, MDChicago, IL 606571336213495
Common questions
What is Gregory S. Doren, M.D.'s NPI number?
Gregory S. Doren, M.D.'s National Provider Identifier (NPI) is 1851411847, issued on Mar 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Doren, M.D. located?
The NPPES record lists a practice address at 3000 N Halsted St, Chicago, IL, 60657. Phone: (773) 935-2800. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Doren, M.D.'s license?
NPPES lists Illinois license number 036079629, 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 Gregory S. Doren, M.D. prescribe under Medicare Part D?
In 2024, Gregory S. Doren, M.D. had 2,069 Medicare Part D claims for 448 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
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.