Marc Fenster, D.M.D.
NPI 1821317223 · General Practice Dentistry · Smithtown, NY
Marc Fenster, D.M.D. is a General Practice Dentistry provider in Smithtown, NY (NPI 1821317223).
Provider details
- NPI number
- 1821317223
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- D.M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 047688 (NY)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
16 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$154 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-25
- Last updated
- 2010-05-25
Frequently asked questions
- What is Marc Fenster's NPI number?
- Marc Fenster's National Provider Identifier (NPI) is 1821317223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Fenster's specialty?
- Marc Fenster is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Marc Fenster located?
- Marc Fenster's practice location on file with NPPES is 50 Route 111 Ste 212, Smithtown, NY 11787-3700.
- What is Marc Fenster's phone number?
- The practice phone number listed in the NPPES registry for Marc Fenster is (631) 724-6960.
- Is Marc Fenster's NPI active?
- Yes — Marc Fenster's NPI (1821317223) is active in the NPPES registry as of the last update on 2010-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.