DR. TERESA D WILLIAMS MD
NPI 1306827399
Allergy & Immunology in Winchester, VA

Q: What is Teresa Williams's NPI number?

The NPI number for Teresa Williams is 1306827399. It was assigned to this individual provider in the NPPES registry on November 8, 2005. The provider is also known as Dr. Teresa Dawn Nesselroad MD.

Q: What is Teresa Williams's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Teresa Williams was last updated on October 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 November 08, 2005PECOS EnrolledAccepts Medicare Assignment

1828 PLAZA DR, WINCHESTER, VA 22601(540) 662-9115(540) 665-0411 Get Directions Write a Review

NPPES record last updated: October 31, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 31, 2023, Apr 28, 2022, Jul 6, 2021 and 2 more (5 updates tracked since 2017).

On this page

About Dr. Teresa D Williams Md NPPES

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

DR. TERESA D WILLIAMS MD (NPI 1306827399) is an individual allergy & immunology provider in Winchester, Virginia, licensed in Virginia (0101267695) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with Winchester Medical Center, and is a graduate of University Of Pittsburgh School Of Medicine (1998).

NPPES Registry Identity

NPI1306827399

Entity TypeIndividualFemale

Primary Taxonomy207K00000X

Provider Legal NameDR. TERESA D WILLIAMSCredential: MD

Location Address1828 PLAZA DRWinchester, VA 22601-6365

Mailing AddressPo Box 603725Charlotte, NC 28260-3725 · (828) 575-2625 · Fax (828) 350-2174

Phone(540) 662-9115

Fax(540) 665-0411

Sole ProprietorNo

Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 1998

Enumeration DateNovember 8, 2005

Last NPPES UpdateOctober 31, 20235 updates tracked since enumeration

NPPES CertifiedOctober 31, 2023

✔ NPI 1306827399 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in VA · 0101267695

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

1828 PLAZA DR, Winchester, VA 22601

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Other Names 1

Former Name (1)Dr. Teresa Dawn Nesselroad Md

Other Identifiers 3

OtherVVW678F103VA · Ptan

Medicaid1306827399VA

Medicaid1306827399WV

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, Highmark Blue Cross Blue Shield West Virginia, Oscar Health Plan of North Carolina, Inc and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Teresa D Williams Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3779765409

PECOS Enrollment IDI20191104001763

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.

Medicare Billing Reassignment

Medicare enrollment records show Teresa Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Allergy Partners, PLLC

Same address

Allergy & Immunology

1828 W PLAZA DR
Winchester, VA 22601

Reassigned Medicare billing, Virginia enrollment
23 clinicians in this Medicare group

NPI 1427435759 (540) 662-9115

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

3,897 services75 patients

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

610 services25 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

378 services25 patients

Professional service for single injection of allergen 95115

A single allergen injection is a procedure where a small amount of a specific allergen is injected into your body. This is done to test your body's reaction to the allergen or to help your immune system become less sensitive to it, reducing allergic symptoms.

164 services12 patients

Administration and interpretation of patient-focused health risk assessment 96160

This procedure involves a detailed evaluation of your health to identify potential risks. It includes analyzing your medical history, lifestyle habits, and family health history. The results are interpreted to provide a personalized plan to improve your health and prevent future issues.

142 services125 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

121 services121 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Winchester Medical Center

Acute Care Hospitals · Winchester, VA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490005

Location1840 Amherst StWinchester, VA 22601 · Winchester City County

Emergency services Birthing friendly

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Ambulatory infusion pump, mechanical, reusable, for infusion 8 hours or greater E0779

DME-Other DME · category DE000N

1 supplier11 claims11 services$11.88 avg. paid by Medicare

Injection, immune globulin (hizentra), 100 mg J1559

Treatment-Injections and Infusions (nononcologic) · category RI008N

1 supplier13 claims2,600 services$9.52 avg. paid by Medicare

Injection, immune globulin/hyaluronidase, (hyqvia), 100 mg immuneglobulin J1575

Treatment-Injections and Infusions (nononcologic) · category RI008N

2 suppliers11 claims3,850 services$12.28 avg. paid by Medicare

Supplies for external non-insulin drug infusion pump, syringe type cartridge, sterile, each K0552

DME-Other DME · category DE000N

3 suppliers21 claims47 services$2.37 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

REBECCA L DAWLEY PA-C

Physician Assistant

1828 PLAZA DR
WINCHESTER, VA 22601

Winchester City (540) 662-9115

MS. NANCY D MYERS MPA, PA-C

Physician Assistant

1828 PLAZA DR
WINCHESTER, VA 22601

Winchester City (540) 662-9115

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 Teresa Williams's NPI number?

The NPI number for Teresa Williams is 1306827399. It was assigned to this individual provider in the NPPES registry on November 8, 2005. The provider is also known as Dr. Teresa Dawn Nesselroad MD.

Where is Teresa Williams located?

Teresa Williams practices at 1828 Plaza Dr, Winchester, VA 22601. The listed phone number is (540) 662-9115.

What is Teresa Williams's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Teresa Williams enrolled in Medicare?

Yes. Teresa Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Teresa Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Teresa Williams reassigns Medicare benefits to Allergy Partners, PLLC (Winchester, VA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Teresa Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Teresa Williams accept?

Health plans from CareSource, Highmark Blue Cross Blue Shield West Virginia, Oscar Health Plan of North Carolina, Inc and UnitedHealthcare list Teresa Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Teresa Williams affiliated with any hospitals?

According to CMS data, Teresa Williams is affiliated with Winchester Medical Center.

When was this NPI record last updated?

The NPPES record for Teresa Williams was last updated on October 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.