William James Mesnard, MD
Rheumatology Physician · Millburn, NJ
William James Mesnard, MD is a rheumatology physician with a practice address in Millburn, New Jersey, and NPI 1467559617, issued on Sep 20, 2006. Check the license (New Jersey MA46581, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William James Mesnard
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- MA46581 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 116 Millburn Ave, Millburn, NJ 07041
- Phone
- (973) 375-2545
- Enumerated
- Sep 20, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (973) 467-4207
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 253 in New Jersey → Look up another NPI →
Also registered at 116 Millburn Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yatinder Bains, M.D.Gastroenterology Physician1205908118
- Mark Caplan, D.D.S.Orthodontics and Dentofacial Orthopedics Dentistry1639293632
- Tandeep Cheema, DDSDentist1467513283
- Rajendra Desai, MDCardiovascular Disease Physician1144338641
- Marc Goldman, DDSPeriodontics1922015361
- Lonnie Hanauer, M.D.Specialist1982618146
Verify William James Mesnard 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 MA46581Check 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 rheumatology physician in 2024
203 Medicare Part D claims for 90 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Prednisone40 claims
- Hydroxychloroquine Sulfate25 claims
- Methotrexate15 claims
- Allopurinol13 claims
- Sulfasalazine13 claims
- Nabumetone12 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.
William James Mesnard among 253 rheumatology physician records in New Jersey
William James Mesnard, MD is one of 253 rheumatology physician records with a practice address in New Jersey. 86% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 54% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 75% of these records are
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in New Jersey
There are 253 rheumatology physician records in New Jersey.
All 253 in New Jersey → Every provider in Millburn → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Yelena Chuzhin, M.D.Livingston, NJ 070391881691707
- Lee Kaufman, MDLivingston, NJ 070391528020591
- Jill Ritter, MDLivingston, NJ 070391043272479
- Michael Yellin, MDMontclair, NJ 070431164741641
- Flora Bai, MDVerona, NJ 070441740250141
- Frank Barbera, M.D.North Arlington, NJ 070311164478004
- Nicholas Cannarozzi, M.D.West Orange, NJ 070521194810259
- Andrew Weinberger, M.D.West Orange, NJ 070521871531533
Common questions
What is William James Mesnard, MD's NPI number?
William James Mesnard, MD's National Provider Identifier (NPI) is 1467559617, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William James Mesnard, MD located?
The NPPES record lists a practice address at 116 Millburn Ave, Millburn, NJ, 07041. Phone: (973) 375-2545. Providers update this record themselves, so call before visiting.
How can I verify William James Mesnard, MD's license?
NPPES lists New Jersey license number MA46581, 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 James Mesnard, MD prescribe under Medicare Part D?
In 2024, William James Mesnard, MD had 203 Medicare Part D claims for 90 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.