Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Julia Isen

Family Nurse Practitioner in Mill Valley, CA · enumerated 2008.

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

National Provider Identifier

1427222967

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Registry record

Entity type Individual (Type 1)

Name Julia Isen

Sex Female

Practice address 645 Northern Ave, Mill Valley, CA, 94941

Phone (415) 888-2211

Enumeration date Apr 16, 2008

Last updated in NPPES Mar 29, 2010

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License T20080426 (MD) 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

Is NPI 1427222967 active?

Yes, as of the latest NPPES snapshot, NPI 1427222967 is active (record last updated 2010-03-29).

How do I verify Julia Isen's NPI record?

Cross-check NPI 1427222967 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-29.