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

Mr. Darren M Mertz, RPH

Pharmacist in Tacoma, WA · enumerated 2007.

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

National Provider Identifier

1659583508

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Registry record

Entity type Individual (Type 1)

Name Mr. Darren M Mertz

Credential RPH

Sex Male

Practice address Tacoma, WA, 98402

Phone (253) 495-2740

Fax (253) 590-0211

Enumeration date May 4, 2007

Last updated in NPPES Dec 3, 2010

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

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License PH00039768 (WA) Primary

183500000X Pharmacist Pharmacy Service Providers · License 11281 (AZ) Secondary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

Other identifiers

Identifier	Type	State	Issuer
PH00039768	Other	WA	PHARMACIST LICENCE NUMBER

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 Darren Mertz's NPI record?

Cross-check NPI 1659583508 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659583508 active?

Yes, as of the latest NPPES snapshot, NPI 1659583508 is active (record last updated 2010-12-03).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-03.