Katelyn Pennisi Williar, P.A.
Medical Physician Assistant · Washington, DC
Katelyn Pennisi Williar, P.A. is a medical physician assistant with a practice address in Washington, District of Columbia, and NPI 1891029260, issued on Oct 1, 2009. Check the license with the District of Columbia board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katelyn Pennisi Williar
- Credential
- P.A.
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 0110003165 VA
Self-reported in NPPES; status is on the state search - Practice location
- 5255 Loughboro RD., NW, Washington, DC 20016
- Phone
- (240) 537-4088
- Enumerated
- Oct 1, 2009
- Record last updated
- Mar 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (240) 537-4588
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 210 in District of Columbia → Look up another NPI →
Verify Katelyn Pennisi Williar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich District of Columbia board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $146.06
7 payments; by number, the most common kind was food and beverage; the largest payer was Verrica Pharmaceuticals Inc. The 16,165 providers of this specialty with any payment received $1,055.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Katelyn Pennisi Williar among 210 medical physician assistant records in District of Columbia
Katelyn Pennisi Williar, P.A. is one of 210 medical physician assistant records with a practice address in District of Columbia. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 32% of them.
- NPI issued2009 · 32% of these records are older, 63% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · 44% of these records are
- Record last updated2020 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in District of Columbia
There are 210 medical physician assistant records in District of Columbia.
All 210 in District of Columbia → Every provider in Washington → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Ashleigh EbreneyinWashington, DC 200161235872375
- Karis Kellner, PA-C, CAQ-EMWashington, DC 200161386116226
- Alisa Kuznetsova, PHYSICIAN ASSISTANTWashington, DC 200161932826922
- Nneka Motanya, PA-CWashington, DC 200161730482035
- Dennis Siracusa, PA-CWashington, DC 200151982905048
- Harry Teitelbaum, PA-CWashington, DC 200171376503706
- Angela Swann, PACWashington, DC 200181861457731
- Danielle Fernandes, PA-CWashington, DC 200191447778006
Common questions
What is Katelyn Pennisi Williar, P.A.'s NPI number?
Katelyn Pennisi Williar, P.A.'s National Provider Identifier (NPI) is 1891029260, issued on Oct 1, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Katelyn Pennisi Williar, P.A. located?
The NPPES record lists a practice address at 5255 Loughboro RD., NW, Washington, DC, 20016. Phone: (240) 537-4088. Providers update this record themselves, so call before visiting.
How can I verify Katelyn Pennisi Williar, P.A.'s license?
Search the District of Columbia board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.