Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marc Romney Williamson, CRNA

Certified Registered Nurse Anesthetist in Mcpherson, KS · enumerated 2006.

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

National Provider Identifier

1225008279

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Registry record

Entity type Individual (Type 1)

Name Marc Romney Williamson

Credential CRNA

Sex Male

Practice address 1000 Hospital Dr, Mcpherson, KS, 67460

Phone (620) 241-2250

Enumeration date Jan 24, 2006

Last updated in NPPES May 12, 2011

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 54084 (KS) 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 Marc Williamson practice?

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

What is the NPI number for Marc Williamson?

The National Provider Identifier (NPI) for Marc Williamson is 1225008279, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-12.