Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Joseph J Mattern III, MD

Individual provider Family Medicine Physician · NPI 1023060423

Joseph J Mattern III, MD is a Family Practice in Port Townsend, Washington. Qualified in 2000, 26 years ago. Practices with Jefferson County Public Hospital District No 2, a 150-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
26
Licensed in
WA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

915 Sheridan St Ste B103
Port Townsend, WA 98368-2931
Phone: (360) 379-8031
Fax: (360) 385-0418
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD00042614 (WA)

Record details

NPI number1023060423
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 16, 2006
Last updated in NPPESSeptember 2, 2011
Mailing address915 Sheridan St, Suite B103, Port Townsend, WA 98368-2931

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Also practisesOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Jefferson County Public Hospital District No 2 — 150 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Port Townsend