William Prosniewski, DMD
General Practice Dentistry · Bartlett, IL
William Prosniewski, DMD is a general practice dentistry with a practice address in Bartlett, Illinois, and NPI 1205405685, issued on Jun 21, 2021. Check the license (Illinois 019033158, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Prosniewski
- Credential
- DMD
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 019033158 IL
Self-reported in NPPES; status is on the state search - Practice location
- 116 W Bartlett Ave, Bartlett, IL 60103
- Phone
- (630) 837-2779
- 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 general practice dentistry records → All 5,276 in Illinois → Look up another NPI →
Also registered at 116 W Bartlett Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Prosniewski, DDSGeneral Practice Dentistry1760572861
Verify William Prosniewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019033158Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average general practice dentistry in 2024
21 Medicare Part D claims for 15 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin14 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.
Industry payments in 2024: $13.22
1 payment: food and beverage; the largest payer was Dentsply Sirona Inc. The 41,669 providers of this specialty with any payment received $597.01 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.
William Prosniewski among 5,276 general practice dentistry records in Illinois
William Prosniewski, DMD is one of 5,276 general practice dentistry 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 85% of them.
- NPI issued2021 · 85% of these records are older, 12% 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 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 general practice dentistry records list a practice address in Bartlett
They are 17 of the 384 NPPES records with a practice address in Bartlett, and 5,276 general practice dentistry records in Illinois.
All 5,276 in Illinois → Every provider in Bartlett → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- David Ascher, DDSBartlett, IL 601031538389994
- Rosanne Derango, DMDBartlett, IL 601031336315035
- James Economos, D.D.S.Bartlett, IL 601031437226669
- Umberto Ficarella, D.D.S.,P.C.Bartlett, IL 601031962569285
- Dan Hilo, D.D.S.Bartlett, IL 601031316145501
- Albert Mategrano, DDS.Bartlett, IL 601031194061481
- Nishi ParikhBartlett, IL 601031700560711
- Kunal Patel, D.D.S.Bartlett, IL 601031316271380
Common questions
What is William Prosniewski, DMD's NPI number?
William Prosniewski, DMD's National Provider Identifier (NPI) is 1205405685, issued on Jun 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is William Prosniewski, DMD located?
The NPPES record lists a practice address at 116 W Bartlett Ave, Bartlett, IL, 60103. Phone: (630) 837-2779. Providers update this record themselves, so call before visiting.
How can I verify William Prosniewski, DMD's license?
NPPES lists Illinois license number 019033158, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does William Prosniewski, DMD prescribe under Medicare Part D?
In 2024, William Prosniewski, DMD had 21 Medicare Part D claims for 15 beneficiaries; the average among general practice dentistry prescribers was 83. 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.