What is Stuart Chassen's NPI number?

Stuart Chassen's National Provider Identifier (NPI) is 1326137555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Stuart Chassen's specialty?

Stuart Chassen is listed in the NPPES registry with a primary specialty of Endodontics (Dental Providers).

Where is Stuart Chassen located?

Stuart Chassen's practice location on file with NPPES is 3443 213th St, Bayside, NY 11361-1554.

What is Stuart Chassen's phone number?

The practice phone number listed in the NPPES registry for Stuart Chassen is (718) 229-6600.

Is Stuart Chassen's NPI active?

Yes — Stuart Chassen's NPI (1326137555) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

Stuart Chassen

NPI 1326137555 · Endodontics · Bayside, NY

Stuart Chassen is a Endodontics provider in Bayside, NY (NPI 1326137555).

Provider details

NPI number: 1326137555
Entity type: Individual
Primary specialty: EndodonticsDental Providers
Sex: Male
Sole proprietor: No
License: 033951 (NY)

Practice location

3443 213th St

Bayside, NY 11361-1554

Phone: (718) 229-6600

Fax: (718) 224-4955

Street-level locationGet directions

More NY providers

Mailing address

3443 213th St

Bayside, NY 11361-1554

Specialties & taxonomies

EndodonticsPrimary1223E0200XLicense 033951 (NY)
Dental Providers

Profile Score

Detailed profile(92/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure33% of score
20 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.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Penicillin V Potassium	41	37
Clindamycin Hcl	14	13
Amoxicillin	11	—

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$51 across 2 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.

Enumerated: 2006-10-12
Last updated: 2007-07-08

Frequently asked questions

What is Stuart Chassen's NPI number?: Stuart Chassen's National Provider Identifier (NPI) is 1326137555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Stuart Chassen's specialty?: Stuart Chassen is listed in the NPPES registry with a primary specialty of Endodontics (Dental Providers).
Where is Stuart Chassen located?: Stuart Chassen's practice location on file with NPPES is 3443 213th St, Bayside, NY 11361-1554.
What is Stuart Chassen's phone number?: The practice phone number listed in the NPPES registry for Stuart Chassen is (718) 229-6600.
Is Stuart Chassen's NPI active?: Yes — Stuart Chassen's NPI (1326137555) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Frequently asked questions