Sean Seosap Ryan, M.D.
Hospitalist Physician · Chicago, IL
Sean Seosap Ryan, M.D. is a hospitalist physician with a practice address in Chicago, Illinois, and NPI 1841584992, issued on Jun 7, 2011. Check the license (Illinois 036-099387, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Sean Seosap Ryan
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 036-099387 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1653 W Congress Pkwy, Chicago, IL 60612
- Phone
- (312) 942-4200
- Enumerated
- Jun 7, 2011
- Record last updated
- Apr 11, 2022
- Fax
- (312) 942-3568
- Medicaid ID
- 891229A NC
- Medicare enrollment
- Enrolled (PECOS I20111006000404); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →
Also registered at 1653 W Congress Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sean Seosap Ryan 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 036-099387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average hospitalist physician in 2024
126 Medicare Part D claims for 67 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 24 claims were for opioids.
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.
Bills Medicare through one group practice
- Rush University Medical GroupChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Seosap Ryan among 1,535 hospitalist physician records in Illinois
Sean Seosap Ryan, M.D. is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 35% of them.
- NPI issued2011 · 35% of these records are older, 60% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated1991 · median 2013 among the 1,339 with a school on file
- Record last updated2022 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Illinois
There are 1,535 hospitalist physician records in Illinois.
All 1,535 in Illinois → Every provider in Chicago → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Catherine Dimou, M.D.Chicago, IL 606121073615076
- Ann Goh, M.D.Chicago, IL 606121013019728
- Dorian Guerra, M.D.Chicago, IL 606121053590430
- Scott Hasler, M.D.Chicago, IL 606121619079282
- Syed Hassan, M.D.Chicago, IL 606121902014962
- Richard Huh, M.D.Chicago, IL 606121487742409
- Jisu Kim, M.D.Chicago, IL 606121275645871
- Rudolf Kumapley, MBCHBChicago, IL 606121932138922
Common questions
What is Sean Seosap Ryan, M.D.'s NPI number?
Sean Seosap Ryan, M.D.'s National Provider Identifier (NPI) is 1841584992, issued on Jun 7, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Sean Seosap Ryan, M.D. located?
The NPPES record lists a practice address at 1653 W Congress Pkwy, Chicago, IL, 60612. Phone: (312) 942-4200. Providers update this record themselves, so call before visiting.
How can I verify Sean Seosap Ryan, M.D.'s license?
NPPES lists Illinois license number 036-099387, 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 Sean Seosap Ryan, M.D. prescribe under Medicare Part D?
In 2024, Sean Seosap Ryan, M.D. had 126 Medicare Part D claims for 67 beneficiaries; the average among hospitalist physician prescribers was 521. 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.