NPI Portal NPI Lookup & Verification

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

Dr. Johnson Kar Tsun Wong, M.D.

Internal Medicine Physician in Sonora, CA · enumerated 2005 · practices at Solo Internal Medicine.

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

National Provider Identifier

1184875759

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Registry record

Entity type Individual (Type 1)
Name Dr. Johnson Kar Tsun Wong
Credential M.D.
Sex Male
Practice address Sonora, CA, 95370
Phone (209) 768-1217
Fax (209) 533-2061
Enumeration date Sep 23, 2005
Last updated in NPPES Oct 1, 2008

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G79608 (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
72-1325399 Other CA PROVIDER TAX ID#
ZZZ04982Z Other - GROUP ID#
00G796080 Medicaid CA -

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.

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Frequently asked questions

Where does Johnson Wong practice?
The practice location on file with NPPES is in Sonora, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Johnson Wong?
The National Provider Identifier (NPI) for Johnson Wong is 1184875759, 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 2008-10-01.