John Oppenheimer, M.D., PLLC
NPI 1780956441 · Geriatric Medicine (Internal Medicine) Physician · Sag Harbor, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Oppenheimer, M.D., PLLC is a Geriatric Medicine (Internal Medicine) Physician organization in Sag Harbor, NY (NPI 1780956441).
Provider details
- NPI number
- 1780956441
- Entity type
- Organization
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- John Oppenheimer, Physican(631) 725-4600
- License
- 150853 (NY)
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
14 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
- 2012-01-27
- Last updated
- 2012-01-27
Frequently asked questions
- What is John Oppenheimer, M.D., PLLC's NPI number?
- John Oppenheimer, M.D., PLLC's National Provider Identifier (NPI) is 1780956441, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is John Oppenheimer, M.D., PLLC?
- John Oppenheimer, M.D., PLLC is classified in the NPPES registry as Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Oppenheimer, M.D., PLLC located?
- John Oppenheimer, M.D., PLLC's practice location on file with NPPES is 60 Bay St, Sag Harbor, NY 11963-3106.
- What is John Oppenheimer, M.D., PLLC's phone number?
- The practice phone number listed in the NPPES registry for John Oppenheimer, M.D., PLLC is (621) 725-4600.
- Does John Oppenheimer, M.D., PLLC accept Medicare?
- John Oppenheimer, M.D., PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for John Oppenheimer, M.D., PLLC?
- The authorized official listed on John Oppenheimer, M.D., PLLC's NPPES record is John Oppenheimer, Physican. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is John Oppenheimer, M.D., PLLC's NPI active?
- Yes — John Oppenheimer, M.D., PLLC's NPI (1780956441) is active in the NPPES registry as of the last update on 2012-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.