William E D Jantzen Jr., DDS
William E D Jantzen Jr. is a General Practice Dentistry provider (Dentist) practicing in Hingham, MA, registered in the NPPES registry with NPI 1619070042 since 2006. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1619070042 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William E D Jantzen Jr. |
| Credential | DDS |
| Sex | Male |
| Practice address | 160 OLD DERBY ST, Hingham, MA, 02043 |
| Phone | 7817498606 |
| Fax | 7817498607 |
| Enumeration date | 2006-09-07 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 14223 | MA |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: William Jantzen, DDS NPI: 1619070042 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 160 OLD DERBY ST, Hingham, MA, 02043
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1225006042 | Katherine Flagg | Individual | Clinical Psychologist | Hingham, MA |
| 1174841282 | Marie Woollacott | Individual | Acupuncturist | Hingham, MA |
| 1063979250 | Nbwn, LLC | Organization | Community/Behavioral Health Agency | Hingham, MA |
| 1962161463 | Cms Advocates, LLC | Organization | Psychiatric/Mental Health Nurse Practitioner | Hingham, MA |
| 1760118947 | Michael Pascale | Individual | Psychiatric/Mental Health Nurse Practitioner | Hingham, MA |
Verify this record
Cross-check NPI 1619070042 against the authoritative CMS record: view William E D Jantzen Jr. 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
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Where does William Jantzen practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.