Dr. Mark Richard Hammarlund, PHD

Dr. Mark Richard Hammarlund is a Adult Development & Aging Psychologist provider (Psychologist) practicing in Everett, WA, registered in the NPPES registry with NPI 1881768299 since 2006. The credential PHD stands for Doctor of Philosophy. Practices at Nancy Adler-Jones, Msw (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1881768299
Entity type	Individual (Type 1)
Name	Dr. Mark Richard Hammarlund
Credential	PHD
Sex	Male
Practice address	Everett, WA, 98201
Phone	4252584058
Enumeration date	2006-11-17
Last updated in NPPES	2010-07-02

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103TA0700X	Adult Development & Aging Psychologist	Primary	PY00000968	WA

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

Copy-ready billing details

Provider: Mark Hammarlund, PHD
NPI: 1881768299
Taxonomy: 103TA0700X (Adult Development & Aging Psychologist)
Address: Everett, WA, 98201

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1821201252	Nancy Adler-Jones, Msw	Organization	Clinical Social Worker	Everett, WA

Verify this record

Cross-check NPI 1881768299 against the authoritative CMS record: view Dr. Mark Richard Hammarlund on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

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.

What specialty is Mark Hammarlund?

Mark Hammarlund is registered in NPPES with the primary taxonomy of Adult Development & Aging Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2010-07-02.