Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM T GRIESSER PA-C
NPI 1699071415
Physician Assistant in Apo, AP

Active since January 27, 2011
51ST MEDICAL GROUP, UNIT 2060, APO, AP 96278(315) 784-8717 Get Directions Write a Review

NPPES record last updated: September 14, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 14, 2026, Sep 8, 2025 (2 updates tracked since 2025).

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 Apo, AP 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 Address51ST MEDICAL GROUP, UNIT 2060Apo, AP 96278-2060
Mailing Address51st Medical Group, Unit 2060Apo, AP 96278-2060
Sole ProprietorNo
Enumeration DateJanuary 27, 2011
Last NPPES UpdateSeptember 14, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 14, 2026
✔ 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 20

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

Physician Assistant
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Physical Therapist
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Social Worker (Clinical)
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Military Health Care Provider (Independent Duty Medical Technicians)
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Dentist
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Emergency Medicine
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Family Medicine
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278
Nurse Practitioner (Family)
51ST MEDICAL GROUP, UNIT 2060
APO, AP 96278

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 51st Medical Group Unit 2060, Apo, AP 96278. The listed phone number is (315) 784-8717.

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 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.