Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark C Johnson, PHD

Clinical Psychologist in White River Junction, VT · enumerated 2006.

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

National Provider Identifier

1801961214

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Registry record

Entity type Individual (Type 1)

Name Mark C Johnson

Credential PHD

Sex Male

Practice address 2456 Christian Street, Suite 204, White River Junction, VT, 05001

Phone (802) 296-3030

Fax (802) 296-8407

Enumeration date Nov 21, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 280 (VT) Primary

PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
1002039	Medicaid	VT	—

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 Mark Johnson's NPI record?

Cross-check NPI 1801961214 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1801961214 active?

Yes — as of the latest NPPES snapshot, NPI 1801961214 is active (record last updated 2007-07-08).

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