Dennis John Ryan, M.D.
Emergency Medicine Physician · Oak Lawn, IL
Dennis John Ryan, M.D. is an emergency medicine physician with a practice address in Oak Lawn, Illinois, and NPI 1083626378, issued on Aug 13, 2006. Check the license (Illinois 036113502, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Dennis John Ryan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036113502 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4440 W 95TH St, Oak Lawn, IL 60453
- Phone
- (708) 684-8000
- Enumerated
- Aug 13, 2006
- Record last updated
- Jun 2, 2022
- Medicaid ID
- 36113502 IL
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 4440 W 95TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nadia Abdessalam, FNP-BCFamily Nurse Practitioner1356888283
- Akram Abdoue, M.D.Anesthesiology Physician1992752489
- Ahmad Abdulla, MDEmergency Medicine Physician1467202556
- Joseph Abraham, CRNACertified Registered Nurse Anesthetist1831653401
- Katherine Absalon, MOT, OTR/LOccupational Therapist1457753436
- Tassneem Abu-Rezeq, DNP, APRN, CPNP-ACPediatric Nurse Practitioner1831904663
Verify Dennis John 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 036113502Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average emergency medicine physician in 2024
33 Medicare Part D claims for 25 beneficiaries, against an average of 226 among the 54,106 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.
Dennis John Ryan among 3,291 emergency medicine physician records in Illinois
Dennis John Ryan, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
163 emergency medicine physician records list a practice address in Oak Lawn
They are 163 of the 2,993 NPPES records with a practice address in Oak Lawn, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Oak Lawn → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- R. Altman, M.D.Oak Lawn, IL 604531285640862
- Adele Cobbs, M.D.Oak Lawn, IL 604531295750669
- Steve Delis, MDOak Lawn, IL 604531720095920
- Mila Felder, M.D., M.S.Oak Lawn, IL 604531265440929
- Shayla Garrett-Hauser, MDOak Lawn, IL 604531457368896
- Robert Harwood, M.D.Oak Lawn, IL 604531194733220
- Abhishek Katiyar, M.D.Oak Lawn, IL 604531346219565
- Anna Kiernicki Sklar, MDOak Lawn, IL 604531467447920
Common questions
What is Dennis John Ryan, M.D.'s NPI number?
Dennis John Ryan, M.D.'s National Provider Identifier (NPI) is 1083626378, issued on Aug 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dennis John Ryan, M.D. located?
The NPPES record lists a practice address at 4440 W 95TH St, Oak Lawn, IL, 60453. Phone: (708) 684-8000. Providers update this record themselves, so call before visiting.
How can I verify Dennis John Ryan, M.D.'s license?
NPPES lists Illinois license number 036113502, 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 Dennis John Ryan, M.D. prescribe under Medicare Part D?
In 2024, Dennis John Ryan, M.D. had 33 Medicare Part D claims for 25 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.