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

Mr. Irving Oi-Ling Mok

Marriage & Family Therapist in San Francisco, CA · enumerated 2006 · practices at City and Couny of San Francisco.

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

National Provider Identifier

1649352196

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Registry record

Entity type Individual (Type 1)

Name Mr. Irving Oi-Ling Mok

Sex Male

Practice address San Francisco, CA, 94108

Phone (415) 392-4453

Enumeration date Oct 20, 2006

Last updated in NPPES Mar 7, 2014

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License LMFT49179 (CA) Primary

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

How do I verify Irving Mok's NPI record?

Cross-check NPI 1649352196 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1649352196 active?

Yes, as of the latest NPPES snapshot, NPI 1649352196 is active (record last updated 2014-03-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-07.