William C. Oppenheim, M.D.
Orthopaedic Surgery Physician · Millburn, NJ
William C. Oppenheim, M.D. is an orthopaedic surgery physician with a practice address in Millburn, New Jersey, and NPI 1649376310, issued on Sep 16, 2006. Check the license (New Jersey MA2618, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William C. Oppenheim
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- MA2618 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 225 Millburn Ave, Millburn, NJ 07041
- Phone
- (973) 379-1991
- Enumerated
- Sep 16, 2006
- Record last updated
- May 12, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (973) 467-8647
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 690 in New Jersey → Look up another NPI →
Also registered at 225 Millburn Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yetunde Adeola, MDPsychiatry Physician1033314299
- Bella Baum, PA-CSurgical Physician Assistant1902046444
- Mubashir Billah, M.D.Urology Physician1235587478
- Michael Bilof, M.D.Surgery Physician1891723136
- Amy Block, LCSWClinical Social Worker1104275650
- Wendy Bond, LCSWClinical Social Worker1033366471
Verify William C. Oppenheim 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 MA2618Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
13 Medicare Part D claims, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D.
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.
The MIPS final score for 2023 (Medicare payment program): 93.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
William C. Oppenheim among 690 orthopaedic surgery physician records in New Jersey
William C. Oppenheim, M.D. is one of 690 orthopaedic surgery physician records with a practice address in New Jersey. 80% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in New Jersey
There are 690 orthopaedic surgery physician records in New Jersey.
All 690 in New Jersey → Every provider in Millburn → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Howard Blank, MDMillburn, NJ 070411992763999
- Ronald Daly, MDMillburn, NJ 070411124122866
- Andrew Levy, MDMillburn, NJ 070411386712032
- Joseph Bellapianta, MDMontclair, NJ 070421588823165
- Louis Day, M.D.Montclair, NJ 070421922532647
- Siddharth Mahure, MD, MBAMontclair, NJ 070421346696499
- John Mendes, M.D.Montclair, NJ 070421558434803
- Cornelius Nicoll, M.D.Montclair, NJ 070421548364581
Common questions
What is William C. Oppenheim, M.D.'s NPI number?
William C. Oppenheim, M.D.'s National Provider Identifier (NPI) is 1649376310, issued on Sep 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William C. Oppenheim, M.D. located?
The NPPES record lists a practice address at 225 Millburn Ave, Millburn, NJ, 07041. Phone: (973) 379-1991. Providers update this record themselves, so call before visiting.
How can I verify William C. Oppenheim, M.D.'s license?
NPPES lists New Jersey license number MA2618, 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 C. Oppenheim, M.D. prescribe under Medicare Part D?
In 2024, William C. Oppenheim, M.D. had 13 Medicare Part D claims; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is William C. Oppenheim, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.