Derek Leo Oconnor, DDS
Dentist · Bourbonnais, IL
Derek Leo Oconnor, DDS is a dentist with a practice address in Bourbonnais, Illinois, and NPI 1376112698, issued on Jun 21, 2021. Check the license (Illinois 019033232, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Derek Leo Oconnor
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 019033232 IL
Self-reported in NPPES; status is on the state search - Practice location
- 801 Main St NW, Bourbonnais, IL 60914
- Phone
- (815) 932-3516
- Enumerated
- Jun 21, 2021
- Record last updated
- Jun 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 4,522 in Illinois → Look up another NPI →
Verify Derek Leo Oconnor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019033232Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average dentist in 2024
70 Medicare Part D claims for 54 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin33 claims
- Sodium Fluoride13 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.
Derek Leo Oconnor among 4,522 dentist records in Illinois
Derek Leo Oconnor, DDS is one of 4,522 dentist records with a practice address in Illinois. 64% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 82% of them.
- NPI issued2021 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 64% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2021 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 dentist records list a practice address in Bourbonnais
They are 16 of the 547 NPPES records with a practice address in Bourbonnais, and 4,522 dentist records in Illinois.
All 4,522 in Illinois → Every provider in Bourbonnais → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Ajay Das, DDSBourbonnais, IL 609141891002994
- Scott Fogel, DDSBourbonnais, IL 609141679818835
- Thomas George, DDSBourbonnais, IL 609141346372695
- Armin Haghighi, DDSBourbonnais, IL 609141982083655
- Jordan HoangBourbonnais, IL 609141679293211
- Brandi KanerBourbonnais, IL 609141275706301
- Bartlomiej Lakomy, DDSBourbonnais, IL 609141528683430
- Jerry Lebeda, DDSBourbonnais, IL 609141609922863
Common questions
What is Derek Leo Oconnor, DDS's NPI number?
Derek Leo Oconnor, DDS's National Provider Identifier (NPI) is 1376112698, issued on Jun 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Derek Leo Oconnor, DDS located?
The NPPES record lists a practice address at 801 Main St NW, Bourbonnais, IL, 60914. Phone: (815) 932-3516. Providers update this record themselves, so call before visiting.
How can I verify Derek Leo Oconnor, DDS's license?
NPPES lists Illinois license number 019033232, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Derek Leo Oconnor, DDS prescribe under Medicare Part D?
In 2024, Derek Leo Oconnor, DDS had 70 Medicare Part D claims for 54 beneficiaries; the average among dentist prescribers was 86. 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.