Cynthia Y. Williams, NP
Nurse Practitioner · Wilmington, DE
Cynthia Y. Williams, NP is a nurse practitioner with a practice address in Wilmington, Delaware, and NPI 1023200318, issued on Aug 10, 2007. Check the license (Delaware APN-0001403, as entered in NPPES) with the Delaware board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cynthia Y. Williams
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- APN-0001403 DE
Self-reported in NPPES; status is on the state search - Practice location
- 1400 N Washington St, Wilmington, DE 19801
- Phone
- (302) 255-1300
- Enumerated
- Aug 10, 2007
- Record last updated
- Aug 10, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (302) 255-1374
- Medicare enrollment
- Enrolled (PECOS I20110304000442); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 545 in Delaware → Look up another NPI →
Also registered at 1400 N Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher James, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1376807685
- William Mazur, M.D.Infectious Disease Physician1518250828
- Sharon MinerPrimary Care Nurse Practitioner1336540657
- Janice Nevin, MDFamily Medicine Physician1487625117
- Lee Preininger, PHARMDPharmacist1477642221
Verify Cynthia Y. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Delaware board licenses this profession
Search for license APN-0001403Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average nurse practitioner in 2024
115 Medicare Part D claims for 11 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 62% of claims.
Most prescribed
- Biktarvy56 claims
- Amlodipine Besylate12 claims
- Carvedilol11 claims
- Juluca11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Christiana Care Health Services IncWilmington, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia Y. Williams among 545 nurse practitioner records in Delaware
Cynthia Y. Williams, NP is one of 545 nurse practitioner records with a practice address in Delaware. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 20% of them.
- NPI issued2007 · 20% of these records are older, 74% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2007 · median 2017 among the 291 with a school on file
- Record last updated2007 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
196 nurse practitioner records list a practice address in Wilmington
They are 196 of the 6,291 NPPES records with a practice address in Wilmington, and 545 nurse practitioner records in Delaware.
All 545 in Delaware → Every provider in Wilmington → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Dawn Brown, NPWilmington, DE 198011043476690
- Nancy Ann Cleary, CRNPWilmington, DE 198011922232685
- Ginger Cowell, NPWilmington, DE 198011023079084
- Tina Cubeta, APN, BCWilmington, DE 198011184907743
- Nadine Fiske, APNWilmington, DE 198011922321124
- Patricia Gibbons, ANPWilmington, DE 198011265458285
- Barbara Harrison, FNPWilmington, DE 198011184820458
- Janice Heinssen, FNPWilmington, DE 198011457331118
Common questions
What is Cynthia Y. Williams, NP's NPI number?
Cynthia Y. Williams, NP's National Provider Identifier (NPI) is 1023200318, issued on Aug 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Y. Williams, NP located?
The NPPES record lists a practice address at 1400 N Washington St, Wilmington, DE, 19801. Phone: (302) 255-1300. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Y. Williams, NP's license?
NPPES lists Delaware license number APN-0001403, as entered by the provider. Search the Delaware board that licenses this profession; the NPPES record confirms identity only.
How much does Cynthia Y. Williams, NP prescribe under Medicare Part D?
In 2024, Cynthia Y. Williams, NP had 115 Medicare Part D claims for 11 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.