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

Mr. Dowie J. Vanderwerff, CRNA

Certified Registered Nurse Anesthetist in Worland, WY · enumerated 2006.

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

National Provider Identifier

1558398867

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Registry record

Entity type Individual (Type 1)

Name Mr. Dowie J. Vanderwerff

Credential CRNA

Sex Male

Practice address Worland, WY, 82401

Phone (307) 347-5723

Enumeration date Jun 26, 2006

Last updated in NPPES Dec 31, 2018

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

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 27722.1028 (WY) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA credential

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

Where does Dowie Vanderwerff practice?

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

What is the NPI number for Dowie Vanderwerff?

The National Provider Identifier (NPI) for Dowie Vanderwerff is 1558398867, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-31.