Eileen L Williams , FNP-C
Nurse Practitioner • Newark, DE
537 Stanton Christiana Rd, Suite 201
Newark, DE 197132146
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Eileen Williams is listed in NPPES under Nurse Practitioner.
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NPI assigned on August 30, 2006; this date does not establish years in practice.
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Published CMS data list 401 Medicare Part D prescriptions, including refills, in 2015.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015. Published rows only; this is not a quality measure.
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Published Part D records, 2015:
- Atripla (Efavirenz/Emtricitab/Tenofovir) — 75 prescription fills, including refills.
- Truvada (Emtricitabine/Tenofovir) — 69 prescription fills, including refills.
- Norvir (Ritonavir) — 65 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 11 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 1,279 in 2013 to 401 in 2015.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2015.
Practice Location & Contact Primary Location
537 Stanton Christiana Rd
Suite 201
Newark, DE 197132146
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
411 standardized 30-day fills in 2015
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$852,780 in 2015
The total cost of these prescriptions in 2015, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Newark and Delaware
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Eileen Williams are from 2015.
113 active clinicians are listed under Nurse Practitioner with a practice address in Newark, DE (547 in Delaware).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Newark
13.3% of these 113 clinicians have the CMS telehealth indicator.
59.3% of these 113 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 69% from 1,279 in 2013 to 401 in 2015.
- 2013: 1,279
- 2014: 1,538
- 2015: 401
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30-day fills
30-day fills decreased 70% from 1,359 in 2013 to 411 in 2015.
- 2013: 1,359
- 2014: 1,651
- 2015: 411
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Part D drug cost
Part D drug cost decreased 35% from $1,312,129 in 2013 to $852,780 in 2015.
- 2013: $1,312,129
- 2014: $3,218,100
- 2015: $852,780
Sources: CMS Medicare Part D Prescribers (2015), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2015.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atripla | Efavirenz/Emtricitab/Tenofovir | 75 | 2,250 | $164,841.75 | 19 |
| Truvada | Emtricitabine/Tenofovir | 69 | 2,130 | $94,436.76 | 16 |
| Norvir | Ritonavir | 65 | 2,107 | $21,565.72 | 20 |
| Prezista | Darunavir Ethanolate | 56 | 1,681 | $71,049.08 | 16 |
| Isentress | Raltegravir Potassium | 42 | 1,260 | $50,832.91 | — |
| Complera | Emtricitab/Rilpivirine/Tenofov | 30 | 900 | $64,130.73 | — |
| Reyataz | Atazanavir Sulfate | 15 | 487 | $20,670.65 | — |
| Ribavirin | Ribavirin | 14 | 420 | $3,315.76 | — |
| Kaletra | Lopinavir/Ritonavir | 12 | 360 | $10,060.74 | — |
| Sovaldi | Sofosbuvir | 12 | 336 | $339,788.50 | — |
| Epzicom | Abacavir Sulfate/Lamivudine | 11 | 307 | $12,087.38 | — |
Source: CMS Part D by Provider and Drug, 2015; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Certified Registered Nurse Practitioner
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Internal Medicine - Infectious Disease
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Career & Practice History
NPI enumerated August 30, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Nurse Practitioners in Newark
- Bonita Penn, FNP-C
- Rebecca Mcmillin, MSN, FNP-BC
- Alexandra Quinn, NURSE PRACTITIONER
- Susan Petrillo, NP
- Stacey Graves, MSN, CRNP
- Patricia Lewis, FNP-BC
Mailing Address
537 Stanton Christiana Rd, Suite 201
Newark, DE 197132146
Phone: 3029949692