Clinic 21 of Connecticut LLC
NPI 1730580325 · Emergency Medicine Physician · Norwalk, CT
Clinic 21 of Connecticut LLC is a Emergency Medicine Physician organization in Norwalk, CT (NPI 1730580325).
Provider details
- NPI number
- 1730580325
- Entity type
- Organization
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Thomas Zyniewicz, President(330) 493-4443
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
11 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
- 2014-09-15
- Last updated
- 2015-05-20
Frequently asked questions
- What is Clinic 21 of Connecticut LLC's NPI number?
- Clinic 21 of Connecticut LLC's National Provider Identifier (NPI) is 1730580325, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clinic 21 of Connecticut LLC?
- Clinic 21 of Connecticut LLC is classified in the NPPES registry as Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clinic 21 of Connecticut LLC located?
- Clinic 21 of Connecticut LLC's practice location on file with NPPES is 497 Westport Ave, Norwalk, CT 06851-4411.
- What is Clinic 21 of Connecticut LLC's phone number?
- The practice phone number listed in the NPPES registry for Clinic 21 of Connecticut LLC is (203) 276-4888.
- Who is the authorized official for Clinic 21 of Connecticut LLC?
- The authorized official listed on Clinic 21 of Connecticut LLC's NPPES record is Thomas Zyniewicz, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clinic 21 of Connecticut LLC's NPI active?
- Yes — Clinic 21 of Connecticut LLC's NPI (1730580325) is active in the NPPES registry as of the last update on 2015-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.