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

Kristin Mersereau Isaacson

Student in an Organized Health Care Education/Training Program in San Rafael, CA · enumerated 2011.

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

National Provider Identifier

1609161264

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Registry record

Entity type Individual (Type 1)

Name Kristin Mersereau Isaacson

Sex Female

Practice address San Rafael, CA, 94901

Phone (415) 459-5999

Enumeration date Jun 12, 2011

Last updated in NPPES Jun 21, 2011

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

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Kristin Isaacson?

The National Provider Identifier (NPI) for Kristin Isaacson is 1609161264, a Type 1 (individual) record in the CMS NPPES registry.

Where does Kristin Isaacson practice?

The practice location on file with NPPES is in San Rafael, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-21.