William T. Derosa, D.O.
Medical Oncology Physician · Morristown, NJ
William T. Derosa, D.O. is a medical oncology physician with a practice address in Morristown, New Jersey, and NPI 1902894991, issued on Oct 12, 2005. Check the license (New Jersey 25MB03927200, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William T. Derosa
- Credential
- D.O.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 25MB03927200 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 95 Madison Ave, Morristown, NJ 07960
- Phone
- (973) 538-5210
- Enumerated
- Oct 12, 2005
- Record last updated
- Apr 8, 2026
- Fax
- (973) 644-9657
- Medicaid ID
- 1092502 NJ
- Medicare enrollment
- Enrolled (PECOS I20101018000124); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 1980
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 140 in New Jersey → Look up another NPI →
Also registered at 95 Madison Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kenneth Adler, M.D,Hematology & Oncology Physician1922096916
- Carol Albers, CCC(A),FAAAAudiologist1326296054
- Valerie Allusson, MDInternal Medicine Physician1154386688
- Allison Armelino, AU.D.Audiologist1376228064
- Bruce Aronwald, D.O.Family Medicine Physician1154375467
- Sandra Berenhaus, M.A., CCC (A)Audiologist1982852265
Verify William T. Derosa 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 25MB03927200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average medical oncology physician in 2024
735 Medicare Part D claims for 114 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Eliquis67 claims
- Jakafi47 claims
- Sulfamethoxazole-Trimethoprim37 claims
- Famciclovir28 claims
- Acyclovir27 claims
- Hydroxyurea27 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
- Barnabas Health Medical Group PCBelleville, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William T. Derosa among 140 medical oncology physician records in New Jersey
William T. Derosa, D.O. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1980 · median 2001 among the 96 with a school on file
- Record last updated2026 · 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 Morristown → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Benjamin Freeman, M.D.Morristown, NJ 079601912206434
- Arielle Urman, MDMorristown, NJ 079601457918989
- Ranjana Tavorath, M.D.East Hanover, NJ 079361013251073
- Andrea Kay, M.D.Florham Park, NJ 079321609185602
- Samit Hirawat, M.D.Chatham, NJ 079281619102878
- Lisa Mills, M.D.Berkeley Heights, NJ 079221215052287
- Ephraim Casper, MDBasking Ridge, NJ 079201174503320
- Afsheen Iqbal, MDBasking Ridge, NJ 079201902061880
Common questions
What is William T. Derosa, D.O.'s NPI number?
William T. Derosa, D.O.'s National Provider Identifier (NPI) is 1902894991, issued on Oct 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William T. Derosa, D.O. located?
The NPPES record lists a practice address at 95 Madison Ave, Morristown, NJ, 07960. Phone: (973) 538-5210. Providers update this record themselves, so call before visiting.
How can I verify William T. Derosa, D.O.'s license?
NPPES lists New Jersey license number 25MB03927200, 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 T. Derosa, D.O. prescribe under Medicare Part D?
In 2024, William T. Derosa, D.O. had 735 Medicare Part D claims for 114 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.