NPI Portal NPI Lookup & Verification

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

Dr. Xihua Sun, M.D. ,M.S.

Specialist in San Jose, CA · enumerated 2006 · practices at Lofton & Tong, LLC.

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

National Provider Identifier

1851326672

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Registry record

Entity type Individual (Type 1)
Name Dr. Xihua Sun
Credential M.D. ,M.S.
Sex Male
Practice address San Jose, CA, 95128
Phone (408) 557-0550
Fax (408) 248-4591
Enumeration date Jul 11, 2006
Last updated in NPPES Aug 12, 2008

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A55886 (CA) 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
00A558861 Other CA MEDICARE ID

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 Xihua Sun?
The National Provider Identifier (NPI) for Xihua Sun is 1851326672, a Type 1 (individual) record in the CMS NPPES registry.
Where does Xihua Sun practice?
The practice location on file with NPPES is in San Jose, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-12.