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

Mr. Mark Lewis Anstadt, ARNP

Individual provider Nurse Practitioner · NPI 1144414145

Mr. Mark Lewis Anstadt, ARNP is a Nurse Practitioner in Seattle, Washington. Graduated from University of Washington School of Medicine in 2007, 19 years ago. Practices with The Polyclinic PLLC, a 366-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
19
Trained at
University of Washington School of Medicine
Licensed in
WA
In the registry since
2007
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

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Practice location Address checks out

904 7th Ave
Seattle, WA 98104
Phone: (206) 860-5603
Fax: (206) 720-7459
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence AP30007837 (WA)

Record details

NPI number1144414145
Entity typeIndividual (Type 1)
GenderMale
Credentials ARNP
Sole proprietorNo
NPI enumeratedSeptember 1, 2007
Last updated in NPPESJune 29, 2026
Certification dateJune 29, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice The Polyclinic Pllc — 366 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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