Denis J. Oconnell, DO
Family Medicine Physician · Hoffman Estates, IL
Denis J. Oconnell, DO is a family medicine physician with a practice address in Hoffman Estates, Illinois, and NPI 1902981970, issued on Oct 26, 2006. Check the license (Illinois 036060648, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Denis J. Oconnell
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036060648 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1555 Barrington RD, Hoffman Estates, IL 60169
- Phone
- (847) 519-7602
- Enumerated
- Oct 26, 2006
- Record last updated
- Jan 9, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (847) 519-7604
- Medicaid ID
- 036060648 IL
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 1555 Barrington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Denis J. Oconnell 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 036060648Check 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 family medicine physician in 2024
23 Medicare Part D claims, against an average of 3,544 among the 117,163 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.
Denis J. Oconnell among 6,215 family medicine physician records in Illinois
Denis J. Oconnell, DO is one of 6,215 family medicine physician records with a practice address in Illinois. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2012 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 family medicine physician records list a practice address in Hoffman Estates
They are 23 of the 1,293 NPPES records with a practice address in Hoffman Estates, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Hoffman Estates → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sonia Abraham, MDHoffman Estates, IL 601691881824704
- Laura Baber, MDHoffman Estates, IL 601691134192636
- David Barnes, DOHoffman Estates, IL 601691275526741
- Calvin Fischer, D.O.Hoffman Estates, IL 601691932227725
- Roseann Gager, M.D.Hoffman Estates, IL 601691053569327
- Regeni George-Brown, M.D.Hoffman Estates, IL 601691912104340
- Shruti Gupta, MDHoffman Estates, IL 601691811256399
- Janice Ko, M.D.Hoffman Estates, IL 601691124348339
Common questions
What is Denis J. Oconnell, DO's NPI number?
Denis J. Oconnell, DO's National Provider Identifier (NPI) is 1902981970, issued on Oct 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Denis J. Oconnell, DO located?
The NPPES record lists a practice address at 1555 Barrington RD, Hoffman Estates, IL, 60169. Phone: (847) 519-7602. Providers update this record themselves, so call before visiting.
How can I verify Denis J. Oconnell, DO's license?
NPPES lists Illinois license number 036060648, 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 Denis J. Oconnell, DO prescribe under Medicare Part D?
In 2024, Denis J. Oconnell, DO had 23 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.