Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sergio D Fefer, M.D.
Specialist in South Weymouth, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1053343574
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Registry record
Entity type Individual (Type 1)
Name Sergio D Fefer
Credential M.D.
Sex Male
Practice address 780 Main St, South Weymouth, MA, 02190
Phone (781) 331-4600
Fax (781) 337-5095
Enumeration date Jul 7, 2006
Last updated in NPPES Jan 4, 2016
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 |
|---|---|---|---|
| 3832495 | Other | MA | CIGNA |
| 0039435 | Other | MA | NEIGHBORHOOD HEALTH PLAN |
| 2123177 | Medicaid | MA | - |
| J40384 | Other | MA | BLUE SHIELD |
| 466687 | Other | MA | TUFTS HEALTH PLAN |
| 117694 | Other | MA | FALLON |
| AA69245 | 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
How do I verify Sergio Fefer's NPI record?
Cross-check NPI 1053343574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1053343574 active?
Yes, as of the latest NPPES snapshot, NPI 1053343574 is active (record last updated 2016-01-04).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-04.