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

Dr. William Matthew Marcil, PH.D., MS, OTR

Mechanotherapist in Virginia Beach, VA · enumerated 2010.

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

National Provider Identifier

1598076945

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Registry record

Entity type Individual (Type 1)

Name Dr. William Matthew Marcil

Credential PH.D., MS, OTR

Sex Male

Practice address Virginia Beach, VA, 23457

Phone (757) 421-7555

Enumeration date Jun 30, 2010

Last updated in NPPES Jun 30, 2010

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

Taxonomy & licenses

172M00000X Mechanotherapist Other Service Providers · License 0119000310 (VA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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 William Marcil practice?

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

What is the NPI number for William Marcil?

The National Provider Identifier (NPI) for William Marcil is 1598076945, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-30.