Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Claus Henner Janssen, M.D.

Family Medicine Physician in Port Townsend, WA · enumerated 2006 · practices at Jefferson County Public Hospital District No 2.

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

National Provider Identifier

1992758312

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Registry record

Entity type Individual (Type 1)

Name Claus Henner Janssen

Credential M.D.

Sex Male

Practice address 1010 Sheridan St, Suite 101, Port Townsend, WA, 98368

Phone (360) 385-3500

Fax (360) 385-5496

Enumeration date May 18, 2006

Last updated in NPPES Nov 15, 2024

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD00031036 (WA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1084391	Medicaid	WA	-

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 Claus Janssen?

The National Provider Identifier (NPI) for Claus Janssen is 1992758312, a Type 1 (individual) record in the CMS NPPES registry.

Where does Claus Janssen practice?

The practice location on file with NPPES is in Port Townsend, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-15.