KATELYN PENNISI WILLIAR P.A.
NPI 1891029260
Physician Assistant - Medical in Washington, DC

Q: What is Katelyn Williar's NPI number?

The NPI number for Katelyn Williar is 1891029260. It was assigned to this individual provider in the NPPES registry on October 1, 2009. The provider is also known as Katelyn N Pennisi.

Q: What is Katelyn Williar's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Katelyn Williar was last updated on March 24, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.

Active since October 01, 2009

5255 LOUGHBORO RD., NW, SIBLEY MEMORIAL HOSPITAL, WASHINGTON, DC 20016(240) 537-4088(240) 537-4588 Get Directions Write a Review

NPPES record last updated: March 24, 2020. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Katelyn Pennisi Williar P.a. NPPES

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

KATELYN PENNISI WILLIAR P.A. (NPI 1891029260) is an individual medical provider in Washington, District Of Columbia, licensed in Virginia (0110003165) and active in the NPI registry since October 2009.

NPPES Registry Identity

NPI1891029260

Entity TypeIndividualFemale

Primary Taxonomy363AM0700X

Provider Legal NameKATELYN PENNISI WILLIARCredential: P.A.

Location Address5255 LOUGHBORO RD., NW, SIBLEY MEMORIAL HOSPITALWashington, DC 20016

Mailing Address20010 Century Blvd, Suite 200 Emergency Medicine AssociatesGermantown, MD 20874 · (240) 686-2300 · Fax (240) 686-2330

Phone(240) 537-4088

Fax(240) 537-4588

Sole ProprietorNo

Enumeration DateOctober 1, 2009

Last NPPES UpdateMarch 24, 2020

NPPES CertifiedMarch 24, 2020

✔ NPI 1891029260 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in VA · 0110003165

5255 LOUGHBORO RD., NW, Washington, DC 20016

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Other Names 1

Former Name (1)Katelyn N Pennisi

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 Katelyn Williar's NPI number?

The NPI number for Katelyn Williar is 1891029260. It was assigned to this individual provider in the NPPES registry on October 1, 2009. The provider is also known as Katelyn N Pennisi.

Where is Katelyn Williar located?

Katelyn Williar practices at 5255 Loughboro Rd., NW Sibley Memorial Hospital, Washington, DC 20016. The listed phone number is (240) 537-4088.

What is Katelyn Williar's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

When was this NPI record last updated?

The NPPES record for Katelyn Williar was last updated on March 24, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.