Ryan Donald McQuillen, M.D.
Internal Medicine Physician · Chicago, IL
Ryan Donald McQuillen, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1770826612, issued on Mar 28, 2013. Check the license (Illinois 125069859, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ryan Donald McQuillen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 125069859 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2525 S Michigan Ave, Chicago, IL 60616
- Phone
- (312) 567-2000
- Enumerated
- Mar 28, 2013
- Record last updated
- Apr 20, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170501002035); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 2525 S Michigan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ryan Donald McQuillen 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 125069859Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
28 Medicare Part D claims for 12 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $88.89
4 payments; by number, the most common kind was food and beverage; the largest payer was Csl Behring. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Usacs Integrated Acute Care Services OF Ohio LLCSpringfield, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Donald McQuillen among 7,238 internal medicine physician records in Illinois
Ryan Donald McQuillen, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 57% of them.
- NPI issued2013 · 57% of these records are older, 41% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2013 · median 2003 among the 3,580 with a school on file
- Record last updated2018 · 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Edward Bleier, MDChicago, IL 606161649256744
- Danny Choy, D.OChicago, IL 606161376526954
- Linus Ema, DOChicago, IL 606161891728010
- Juhyun Ha, M.D.Chicago, IL 606161811913395
Common questions
What is Ryan Donald McQuillen, M.D.'s NPI number?
Ryan Donald McQuillen, M.D.'s National Provider Identifier (NPI) is 1770826612, issued on Mar 28, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Donald McQuillen, M.D. located?
The NPPES record lists a practice address at 2525 S Michigan Ave, Chicago, IL, 60616. Phone: (312) 567-2000. Providers update this record themselves, so call before visiting.
How can I verify Ryan Donald McQuillen, M.D.'s license?
NPPES lists Illinois license number 125069859, 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 Ryan Donald McQuillen, M.D. prescribe under Medicare Part D?
In 2024, Ryan Donald McQuillen, M.D. had 28 Medicare Part D claims for 12 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.