John A. Guerrieri, DDS
General Practice Dentistry · Itasca, IL
John A. Guerrieri, DDS is a general practice dentistry with a practice address in Itasca, Illinois, and NPI 1225247000, issued on May 21, 2007. Check the license (Illinois 19-021812, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John A. Guerrieri
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 19-021812 IL
Self-reported in NPPES; status is on the state search - Practice location
- 421 W Irving Park RD, Itasca, IL 60143
- Phone
- (847) 250-5394
- Enumerated
- May 21, 2007
- Record last updated
- Jun 23, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (847) 250-5393
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 5,276 in Illinois → Look up another NPI →
Also registered at 421 W Irving Park RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leonidas Ragas, DDSGeneral Practice Dentistry1134287733
- Joseph Sperlazzo, D.D.S.General Practice Dentistry1376562959
Verify John A. Guerrieri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 19-021812Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average general practice dentistry in 2024
115 Medicare Part D claims for 61 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin54 claims
- Ibuprofen27 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.
John A. Guerrieri among 5,276 general practice dentistry records in Illinois
John A. Guerrieri, DDS 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 2007, is newer than 32% of them.
- NPI issued2007 · 32% of these records are older, 43% 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 updated2016 · 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).
4 general practice dentistry records list a practice address in Itasca
They are 4 of the 220 NPPES records with a practice address in Itasca, and 5,276 general practice dentistry records in Illinois.
All 5,276 in Illinois → Every provider in Itasca → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Daniel Homuth, DDSItasca, IL 601431124179601
- Leonidas Ragas, DDSItasca, IL 601431134287733
- Joseph Sperlazzo, D.D.S.Itasca, IL 601431376562959
- Shobhit BansalHuntley, IL 601421972918308
- Patricia Castor, D.D.SHuntley, IL 601421285650002
- John FaublHuntley, IL 601421831112994
- Laurita Lukas, D.D.S.Huntley, IL 601421497961601
- Phillip Sukel, DDSHuntley, IL 601421801999891
Common questions
What is John A. Guerrieri, DDS's NPI number?
John A. Guerrieri, DDS's National Provider Identifier (NPI) is 1225247000, issued on May 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John A. Guerrieri, DDS located?
The NPPES record lists a practice address at 421 W Irving Park RD, Itasca, IL, 60143. Phone: (847) 250-5394. Providers update this record themselves, so call before visiting.
How can I verify John A. Guerrieri, DDS's license?
NPPES lists Illinois license number 19-021812, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does John A. Guerrieri, DDS prescribe under Medicare Part D?
In 2024, John A. Guerrieri, DDS had 115 Medicare Part D claims for 61 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.