Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William R Helfrich Jr., MD
Specialist in South Weymouth, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1124017207
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Registry record
Entity type Individual (Type 1)
Name Dr. William R Helfrich Jr.
Credential MD
Sex Male
Practice address 780 Main St, South Weymouth, MA, 02190
Phone (781) 331-4600
Fax (781) 337-5095
Enumeration date Oct 20, 2005
Last updated in NPPES Jun 22, 2017
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1900042 | Other | MA | UNITED HEALTHCARE |
| 0011778 | Other | MA | NEIGHBORHOOD HEALTH PLAN |
| 032336 | Other | MA | TUFTS |
| 34748 | Other | MA | FALLON |
| 9718672 | Medicaid | MA | - |
| 0056854001 | Other | MA | CIGNA |
| 4294823 | Other | MA | US HEALTHCARE |
| 27740 | Other | MA | HARVARD PILGRIM |
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.
Frequently asked questions
Where does William Helfrich practice?
The practice location on file with NPPES is in South Weymouth, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Helfrich?
The National Provider Identifier (NPI) for William Helfrich is 1124017207, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-22.