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ELIZABETH WILLIAMS-DRUEDING DO
NPI 1639589351
Internal Medicine in King Of Prussia, PA

Active since May 02, 2014Opted out of Medicare · through Dec 20, 2026
700 S HENDERSON RD STE 108, KING OF PRUSSIA, PA 19406(484) 923-9176(484) 873-1689 Get Directions Write a Review

NPPES record last updated: January 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jan 13, 2026, Mar 12, 2025, Feb 4, 2025 and 3 more (6 updates tracked since 2017).

About Elizabeth Williams-drueding Do NPPES

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

ELIZABETH WILLIAMS-DRUEDING DO (NPI 1639589351) is an individual internal medicine provider in King Of Prussia, Pennsylvania, licensed in Pennsylvania (OS023372) and active in the NPI registry since May 2014. She has opted out of Medicare through December 20, 2026 and remains eligible to order and refer, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of Philadelphia College Of Osteopathic Medicine (2014).

NPPES Registry Identity

NPI1639589351
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameELIZABETH WILLIAMS-DRUEDINGCredential: DO
Location Address700 S HENDERSON RD STE 108King Of Prussia, PA 19406-3530
Mailing Address700 S Henderson Rd Ste 108King Of Prussia, PA 19406-3530 · (484) 923-9176 · Fax (484) 873-1689
Phone(484) 923-9176
Fax(484) 873-1689
Sole ProprietorNo
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2014
Enumeration DateMay 2, 2014
Last NPPES UpdateJanuary 13, 20266 updates tracked since enumeration
NPPES CertifiedJanuary 13, 2026
✔ NPI 1639589351 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · OS023372
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
700 S HENDERSON RD STE 108, King Of Prussia, PA 19406
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Highmark Blue Cross Blue Shield Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Elizabeth Williams-drueding Do has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from December 20, 2024 through December 20, 2026.

Opt-Out Effective DateDecember 20, 2024
Opt-Out In Effect ThroughDecember 20, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 7

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
141 services126 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
63 services61 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
45 services34 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
38 services36 patients
Transitional care management services for problem of at least moderate complexity 99495
Transitional care management services focus on coordinating and managing your care after you leave the hospital. For moderate complexity problems, this involves managing your medications, arranging further treatments, and ensuring you have the necessary follow-ups.
13 services13 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
12 services12 patients

Hospital Affiliations CMS Care Compare 2

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

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390111
Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County
Emergency services Birthing friendly

Bryn Mawr Hospital

Acute Care Hospitals · Bryn Mawr, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390139
Location130 South Bryn Mawr AveBryn Mawr, PA 19010 · Montgomery County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19406 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
$137.17 typical visit price
range $59.88 – $180.99
Typical copayment $34.29 (range $14.97 – $45.24)
Most-billed visit code 99204
Established Patient
$105.21 typical visit price
range $19.30 – $147.29
Typical copayment $26.30 (range $4.82 – $36.82)
Most-billed visit code 99214
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 2

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

ELYSE SARAH ROSENTHAL D.O.
Internal Medicine
700 S HENDERSON RD STE 108
KING OF PRUSSIA, PA 19406
Montgomery County (484) 207-5624
LISA ANNE MCGOVERN RN, FNP-C
Nurse Practitioner (Family)
700 S HENDERSON RD STE 108
KING OF PRUSSIA, PA 19406
Montgomery County (267) 699-3900

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 Elizabeth Williams-drueding's NPI number?

The NPI number for Elizabeth Williams-drueding is 1639589351. It was assigned to this individual provider in the NPPES registry on May 2, 2014.

Where is Elizabeth Williams-drueding located?

Elizabeth Williams-drueding practices at 700 S Henderson Rd Ste 108, King Of Prussia, PA 19406. The listed phone number is (484) 923-9176.

What is Elizabeth Williams-drueding's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Elizabeth Williams-drueding enrolled in Medicare?

No. Elizabeth Williams-drueding has opted out of Medicare through December 20, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Elizabeth Williams-drueding accept?

Health plans from Highmark Blue Cross Blue Shield Delaware list Elizabeth Williams-drueding 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 Elizabeth Williams-drueding affiliated with any hospitals?

According to CMS data, Elizabeth Williams-drueding is affiliated with Hospital Of Univ Of Pennsylvania and Bryn Mawr Hospital.

When was this NPI record last updated?

The NPPES record for Elizabeth Williams-drueding was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.