Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

MRS. MAHLIA JOY HARNISS PA-C
NPI 1750293056
Physician Assistant in Renton, WA

Active since September 21, 2026
400 S 43RD ST, RENTON, WA 98055(253) 661-4661(425) 690-9549 Get Directions Write a Review

NPPES record added: September 21, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Mrs. Mahlia Joy Harniss Pa-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. MAHLIA JOY HARNISS PA-C (NPI 1750293056) is an individual physician assistant in Renton, Washington and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1750293056
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMRS. MAHLIA JOY HARNISSCredential: PA-C
Location Address400 S 43RD STRenton, WA 98055-5714
Mailing Address400 S 43rd StRenton, WA 98055-5714 · (253) 661-4661 · Fax (425) 690-9549
Fax(425) 690-9549
Sole ProprietorNo
Enumeration DateSeptember 21, 2026
NPPES CertifiedSeptember 21, 2026
✔ NPI 1750293056 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
400 S 43RD ST, Renton, WA 98055

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Speech-Language Pathologist
400 S 43RD ST
RENTON, WA 98055
Physical Therapist
400 S 43RD ST
RENTON, WA 98055
Internal Medicine
400 S 43RD ST, RM 3H-1-053
RENTON, WA 98055
Hospitalist
400 S 43RD ST
RENTON, WA 98055
Student in an Organized Health Care Education/Training Program
400 S 43RD ST
RENTON, WA 98055
Physical Therapist
400 S 43RD ST
RENTON, WA 98055
Pharmacist
400 S 43RD ST
RENTON, WA 98055
Hospitalist
400 S 43RD ST
RENTON, WA 98055

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mahlia Harniss's NPI number?

The NPI number for Mahlia Harniss is 1750293056. It was assigned to this individual provider in the NPPES registry on September 21, 2026.

Where is Mahlia Harniss located?

Mahlia Harniss practices at 400 S 43rd St, Renton, WA 98055. The listed phone number is (253) 661-4661.

What is Mahlia Harniss's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for Mahlia Harniss was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.