NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Johnsen, DO

Family Medicine Physician in Santa Rosa, CA · enumerated 2006 · practices at Sutter Medical Group of the Redwoods.

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

National Provider Identifier

1801830724

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Catherine Johnsen
Credential DO
Sex Female
Practice address 4700 Hoen Ave, Santa Rosa, CA, 95405
Phone (707) 526-3360
Fax (707) 526-0554
Enumeration date Jun 15, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License ZOA7468 (CA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
00AX74680 Medicaid CA -

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

How do I verify Catherine Johnsen's NPI record?
Cross-check NPI 1801830724 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1801830724 active?
Yes, as of the latest NPPES snapshot, NPI 1801830724 is active (record last updated 2007-07-08).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.