WILLIAM T GRIESSER PA-C
NPI 1699071415
Physician Assistant in Washington, DC

Active since January 27, 2011
1600 PENNSYLVANIA AVE, EEOB ROOM 94, WASHINGTON, DC 20500(202) 757-2499 Get Directions Write a Review

NPPES record last updated: September 8, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William T Griesser Pa-c NPPES

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

WILLIAM T GRIESSER PA-C (NPI 1699071415) is an individual physician assistant in Washington, District Of Columbia and active in the NPI registry since January 2011.

NPPES Registry Identity

NPI1699071415
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameWILLIAM T GRIESSERCredential: PA-C
Location Address1600 PENNSYLVANIA AVE, EEOB ROOM 94Washington, DC 20500
Mailing Address1600 Pennsylvania Ave NwWashington, DC 20500-0005 · (202) 757-2499
Sole ProprietorNo
Enumeration DateJanuary 27, 2011
Last NPPES UpdateSeptember 8, 2025
NPPES CertifiedSeptember 8, 2025
NPI 1699071415 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.

Other Providers at the Same Location NPPES

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

Family Medicine
1600 PENNSYLVANIA AVE, EEOB ROOM 94
WASHINGTON, DC 20500

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 William Griesser's NPI number?

The NPI number for William Griesser is 1699071415. It was assigned to this individual provider in the NPPES registry on January 27, 2011.

Where is William Griesser located?

William Griesser practices at 1600 Pennsylvania Ave Eeob Room 94, Washington, DC 20500. The listed phone number is (202) 757-2499.

What is William Griesser'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 William Griesser was last updated on September 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.