NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William Robert Sonnenberg, MD

Family Medicine Physician in Titusville, PA · enumerated 2006.

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

National Provider Identifier

1932173366

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name William Robert Sonnenberg
Credential MD
Sex Male
Practice address Titusville, PA, 16354
Phone (814) 827-4665
Fax (814) 827-4667
Enumeration date Feb 14, 2006
Last updated in NPPES Jun 17, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD025681E (PA) Primary
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
0008981900003 Medicaid PA -

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 Sonnenberg?
The National Provider Identifier (NPI) for William Sonnenberg is 1932173366, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Sonnenberg practice?
The practice location on file with NPPES is in Titusville, 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 2008-06-17.