Dr. John A Guerrieri, DDS
Dr. John A Guerrieri is a General Practice Dentistry provider (Dentist) practicing in Itasca, IL, registered in the NPPES registry with NPI 1225247000 since 2007. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1225247000 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John A Guerrieri |
| Credential | DDS |
| Sex | Male |
| Practice address | 421 W IRVING PARK RD, Itasca, IL, 60143 |
| Phone | 8472505394 |
| Fax | 8472505393 |
| Enumeration date | 2007-05-21 |
| Last updated in NPPES | 2016-06-23 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 19-021812 | IL |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: John Guerrieri, DDS NPI: 1225247000 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 421 W IRVING PARK RD, Itasca, IL, 60143
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1376562959 | Joseph Sperlazzo | Individual | General Practice Dentistry | Itasca, IL |
| 1134287733 | Leonidas Ragas | Individual | General Practice Dentistry | Itasca, IL |
| 1033276654 | John A. Guerrieri D.D.S. Ltd | Organization | General Practice Dentistry | Itasca, IL |
| 1821263773 | Joseph R. Sperlazzo D.D.S., P.C. | Organization | Dental Clinic/Center | Itasca, IL |
Verify this record
Cross-check NPI 1225247000 against the authoritative CMS record: view Dr. John A Guerrieri on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What is the NPI number for John Guerrieri?
Where does John Guerrieri practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-06-23.