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

Mark Duane Merrick, LMFT

Mental Health Counselor in Myrtle Creek, OR · enumerated 2017.

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

National Provider Identifier

1588174932

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Registry record

Entity type Individual (Type 1)

Name Mark Duane Merrick

Credential LMFT

Sex Male

Practice address Myrtle Creek, OR, 97457

Phone (541) 839-2220

Enumeration date Oct 11, 2017

Last updated in NPPES Oct 11, 2017

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License LMFT80920 (CA) Secondary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License T1064 (OR) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

Other identifiers

Identifier	Type	State	Issuer
LMFT80920	Other	CA	LMFT
T1064	Other	OR	LMFT

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

What specialty is Mark Merrick?

Mark Merrick is registered in NPPES with the primary taxonomy of Mental Health Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-11.