William W. Kessler, MD
Medical Oncology Physician · Elizabeth, NJ
William W. Kessler, MD is a medical oncology physician with a practice address in Elizabeth, New Jersey, and NPI 1083710842, issued on Sep 16, 2006. Check the license (New Jersey MA033567, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William W. Kessler
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- MA033567 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 225 Williamson St, Elizabeth, NJ 07202
- Phone
- (908) 355-9177
- Enumerated
- Sep 16, 2006
- Record last updated
- Mar 26, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (908) 355-9583
- Medicaid ID
- 0563706 NJ
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 140 in New Jersey → Look up another NPI →
Also registered at 225 Williamson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Osemwingie Aghedo, MDInternal Medicine Physician1942786785
- Murielle Ahawo, MDPsychiatry Physician1003497504
Verify William W. Kessler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license MA033567Check 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 medical oncology physician in 2024
67 Medicare Part D claims for 13 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Eliquis12 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.
Industry payments in 2024: $471.01
26 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
William W. Kessler among 140 medical oncology physician records in New Jersey
William W. Kessler, MD is one of 140 medical oncology physician records with a practice address in New Jersey. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2013 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in New Jersey
There are 140 medical oncology physician records in New Jersey.
All 140 in New Jersey → Every provider in Elizabeth → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Vincent Salerno, MDElizabeth, NJ 072021881634202
- Jacob Zeffren, MDNutley, NJ 071101053584185
- Damanjit Ghuman, MDJersey City, NJ 073061649366832
- Andrea Ruiz, MDJersey City, NJ 073061699877845
- Raymond Warrell, M.D.Westfield, NJ 070901578830774
- Bhavna Gupta, M.D.Union City, NJ 070871801074455
- Frederick Cohen, MDSouth Orange, NJ 070791942361969
- Lillian Pliner, M.D.Short Hills, NJ 070781518059351
Common questions
What is William W. Kessler, MD's NPI number?
William W. Kessler, MD's National Provider Identifier (NPI) is 1083710842, issued on Sep 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William W. Kessler, MD located?
The NPPES record lists a practice address at 225 Williamson St, Elizabeth, NJ, 07202. Phone: (908) 355-9177. Providers update this record themselves, so call before visiting.
How can I verify William W. Kessler, MD's license?
NPPES lists New Jersey license number MA033567, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William W. Kessler, MD prescribe under Medicare Part D?
In 2024, William W. Kessler, MD had 67 Medicare Part D claims for 13 beneficiaries; the average among medical oncology physician prescribers was 703. 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.