Quick answers
- Does Teresa D. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Teresa D. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Teresa D. Williams see?
- In 2024, CMS data shows 256 Original Medicare patients and 8,051 services for Teresa D. Williams. This counts Original Medicare only and measures volume, not quality.
- What is Teresa D. Williams's NPI number?
- 1306827399. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Teresa D. Williams, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 256 |
|---|---|
| Services billed to Medicare | 8,051 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Test for allergy using allergenic extract (95004)3,897 services
- Professional service for preparation and provision of 1 or more antigens (95165)610 services
- Professional service for multiple injections of allergen (95117)378 services
- Professional service for single injection of allergen (95115)164 services
- Administration and interpretation of patient-focused health risk assessment (96160)142 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure70%
- Arthritis49%
- Asthma33%
- Anxiety27%
- Diabetes24%
Hospitals where Teresa D. Williams works
Medicare's Facility Affiliation Data lists Teresa D. Williams at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Winchester Medical CenterWinchester, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490005
Practice locations
Addresses where Teresa D. Williams is enrolled with Medicare (CMS data updated October 2, 2026).
- 1828 W Plaza DrWinchester, VA 22601 (540) 662‑9115
Group practices
Medicare enrollment lists Teresa D. Williams as a member of this group (CMS data updated October 2, 2026).
- Allergy Partners PLLC143 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Other clinicians in Allergy Partners PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Pittsburgh School Of Medicine |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306827399 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians