Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Kristine L. Jessen-Mather, NP #NPF4647

Pediatric Nurse Practitioner in Grass Valley, CA · enumerated 2006.

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

National Provider Identifier

1942307673

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Registry record

Entity type Individual (Type 1)

Name Ms. Kristine L. Jessen-Mather

Credential NP #NPF4647

Sex Female

Practice address 140 Litton Dr. #100, Grass Valley, CA, 95945

Phone (530) 477-4016

Fax (530) 477-4018

Enumeration date Sep 17, 2006

Last updated in NPPES Feb 5, 2020

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP 4647 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
NP 4647	Other	CA	NURSE PRACT. CERTIFICATIO

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 1942307673 active?

Yes, as of the latest NPPES snapshot, NPI 1942307673 is active (record last updated 2020-02-05).

How do I verify Kristine Jessen-Mather's NPI record?

Cross-check NPI 1942307673 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 2020-02-05.