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

AHDAYSIA WILLIAMSON-MCALLISTER PA-C
NPI 1083435044
Physician Assistant in North Bethesda, MD

Active since October 22, 2024PECOS Enrolled
6000 EXECUTIVE BLVD STE 304, NORTH BETHESDA, MD 20852(301) 969-5673(240) 448-7737 Get Directions Write a Review

NPPES record last updated: August 21, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Aug 21, 2026, Apr 24, 2026 (2 updates tracked since 2026).

About Ahdaysia Williamson-mcallister Pa-c NPPES

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

AHDAYSIA WILLIAMSON-MCALLISTER PA-C (NPI 1083435044) is an individual physician assistant in North Bethesda, Maryland and active in the NPI registry since October 2024. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1083435044
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameAHDAYSIA WILLIAMSON-MCALLISTERCredential: PA-C
Location Address6000 EXECUTIVE BLVD STE 304North Bethesda, MD 20852-3875
Mailing Address402 Big Sam CirLoganville, GA 30052-8010 · (540) 841-6033
Fax(240) 448-7737
Sole ProprietorNo
Enumeration DateOctober 22, 2024
Last NPPES UpdateAugust 21, 20262 updates tracked since enumeration
NPPES CertifiedAugust 21, 2026
NPI 1083435044 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.
6000 EXECUTIVE BLVD STE 304, North Bethesda, MD 20852

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Ahdaysia Williamson-mcallister Pa-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20852 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

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

Dietitian, Registered (Nutrition, Obesity and Weight Management)
6000 EXECUTIVE BLVD STE 304
NORTH BETHESDA, MD 20852

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 Ahdaysia Williamson-mcallister's NPI number?

The NPI number for Ahdaysia Williamson-mcallister is 1083435044. It was assigned to this individual provider in the NPPES registry on October 22, 2024.

Where is Ahdaysia Williamson-mcallister located?

Ahdaysia Williamson-mcallister practices at 6000 Executive Blvd Ste 304, North Bethesda, MD 20852. The listed phone number is (301) 969-5673.

What is Ahdaysia Williamson-mcallister's specialty?

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

Is Ahdaysia Williamson-mcallister enrolled in Medicare?

Yes. Ahdaysia Williamson-mcallister is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ahdaysia Williamson-mcallister was last updated on August 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.