NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Francis Marfizo, D.M.D.

Dentist in Harrisburg, PA · enumerated 2009.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1801129804

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name William Francis Marfizo
Credential D.M.D.
Sex Male
Practice address 4002 Linglestown Rd, Harrisburg, PA, 17112
Phone (717) 657-0934
Fax (717) 657-3918
Enumeration date Sep 9, 2009
Last updated in NPPES Sep 9, 2009

Taxonomy & licenses

122300000X Dentist Dental Providers · License DS 015176 L (PA) Primary
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for William Marfizo?
The National Provider Identifier (NPI) for William Marfizo is 1801129804, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Marfizo practice?
The practice location on file with NPPES is in Harrisburg, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-09.