Ronald J. Glas, MD
Family Medicine Physician · Naperville, IL
Ronald J. Glas, MD is a family medicine physician with a practice address in Naperville, Illinois, and NPI 1720075484, issued on Sep 28, 2005. Check the license (Illinois 036098149, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ronald J. Glas
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036098149 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1247 Rickert Dr, Naperville, IL 60540
- Phone
- (630) 357-7979
- Enumerated
- Sep 28, 2005
- Record last updated
- Feb 23, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (630) 357-1047
- Medicaid ID
- 036098149 1 IL
- Medicare enrollment
- Enrolled (PECOS I20100416000797); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1247 Rickert Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan GibsonFamily Medicine Physician1740579820
- Lori Gilmour, R. PH.Pharmacist1093087199
- Scott Kaszuba, MDOtolaryngology Physician1518994508
- Andrew LunardiniPharmacist1154694149
- Alyssa Papuga, DOFamily Medicine Physician1144665654
- Megan Roake, AUD.Audiologist1609150358
Verify Ronald J. Glas 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 036098149Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average family medicine physician in 2024
7,242 Medicare Part D claims for 518 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 267 claims were for opioids.
Most prescribed
- Atorvastatin Calcium606 claims
- Levothyroxine Sodium280 claims
- Losartan Potassium274 claims
- Rosuvastatin Calcium206 claims
- Lisinopril190 claims
- Amlodipine Besylate189 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).
Bills Medicare through one group practice
- Endeavor Health Medical GroupEvanston, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
86 family medicine physician records list a practice address in Naperville
They are 86 of the 4,634 NPPES records with a practice address in Naperville, and 6,215 family medicine physician records in Illinois.
All 86 in Naperville → All 6,215 in Illinois → Every provider in Naperville →
Other family medicine physician records in Illinois
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- Nikka Abaricia, MDChicago, IL1790366342
- Mohemmed AbbasChicago, IL1609612522
- Muhammad AbbasAlton, IL1588341556
- Syed AbbasWest Dundee, IL1972733103
- Stefanie AbbottMaywood, IL1861137457
- Roann Abdeladl, MDEvanston, IL1437087103
- Ahmed Abdelkader, MDChicago, IL1659104230
- Guy Abderholden, MDAntioch, IL1902899792
Common questions
What is Ronald J. Glas, MD's NPI number?
Ronald J. Glas, MD's National Provider Identifier (NPI) is 1720075484, issued on Sep 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Glas, MD located?
The NPPES record lists a practice address at 1247 Rickert Dr, Naperville, IL, 60540. Phone: (630) 357-7979. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Glas, MD's license?
NPPES lists Illinois license number 036098149, 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 Ronald J. Glas, MD prescribe under Medicare Part D?
In 2024, Ronald J. Glas, MD had 7,242 Medicare Part D claims for 518 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Ronald J. Glas, MD'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.