Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Wc and G

Allergy Physician in San Francisco, CA · enumerated 2009 · authorized official Stephen Wong, President.

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

National Provider Identifier

1417189374

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Registry record

Entity type Organization (Type 2)

Legal business name Wc and G

Practice address 233 W Portal Ave, San Francisco, CA, 94127

Phone (415) 317-2945

Enumeration date Aug 11, 2009

Last updated in NPPES Aug 11, 2009

Taxonomy & classification

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License G51644 (CA) Primary

Authorized official

Name Stephen Wong

Title President

Phone (415) 317-2945

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

Where is Wc and G located?

The practice location on file with NPPES is in San Francisco, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2009-08-11. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-11.