Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Megan C. Merriwether, PH.D., CDP

Clinical Psychologist in Mill Creek, WA · enumerated 2008.

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

National Provider Identifier

1225209190

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Registry record

Entity type Individual (Type 1)

Name Mrs. Megan C. Merriwether

Credential PH.D., CDP

Sex Female

Practice address 15418 Main St, Suite 303, Mill Creek, WA, 98012

Phone (425) 339-5453

Fax (425) 225-8028

Enumeration date Mar 18, 2008

Last updated in NPPES Jan 2, 2014

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CP00005868 (WA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PY 00003905 (WA) 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.

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Frequently asked questions

How do I verify Megan Merriwether's NPI record?

Cross-check NPI 1225209190 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1225209190 active?

Yes, as of the latest NPPES snapshot, NPI 1225209190 is active (record last updated 2014-01-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-02.