William Oppenheim, M.D.
NPI 1649376310 · Orthopaedic Surgery Physician · Millburn, NJ
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Oppenheim, M.D. is a Orthopaedic Surgery Physician provider in Millburn, NJ (NPI 1649376310).
Provider details
- NPI number
- 1649376310
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MA2618 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-16
- Last updated
- 2016-05-12
Frequently asked questions
- What is William Oppenheim's NPI number?
- William Oppenheim's National Provider Identifier (NPI) is 1649376310, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Oppenheim's specialty?
- William Oppenheim is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is William Oppenheim located?
- William Oppenheim's practice location on file with NPPES is 225 Millburn Ave, Millburn, NJ 07041-1737.
- What is William Oppenheim's phone number?
- The practice phone number listed in the NPPES registry for William Oppenheim is (973) 379-1991.
- Does William Oppenheim accept Medicare?
- William Oppenheim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Oppenheim's NPI active?
- Yes — William Oppenheim's NPI (1649376310) is active in the NPPES registry as of the last update on 2016-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.