NPPES file of Aug 9, 2026

Doctors and health care providers in Ansonia, CT

203 individual NPPES records list a practice address in Ansonia, 74th of 200 Connecticut cities. The largest group is clinical social worker: 36, 18% of the city's records, against 9% across Connecticut. Page 5 of 5.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Ansonia

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Ansonia in Connecticut

  • Rank in Connecticut74th of 200 cities by records
  • Share of the state0.2% of Connecticut's records
  • Specialties present25 or more taxonomy codes
  • Top three groups35.5% of all records

Compared with Connecticut as a whole, Ansonia has 4× the state's share of pediatrics physician records.

Providers in Ansonia, alphabetically

  1. Cynthia Zafrin McCahill, LCSWClinical Social Worker1194955351
  2. Joel Zaretzky, M.D.Internal Medicine Physician1285621433
  3. Stacey ZirilliGeneral Practice Dentistry1598327173

The largest Connecticut cities

  1. New Haven9,793
  2. Hartford6,317
  3. Waterbury3,148
  4. Farmington2,993
  5. Bridgeport2,980

All of Connecticut →

How to read this directory

Ansonia, Connecticut appears in the CMS National Plan and Provider Enumeration System with 203 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Ansonia - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Ansonia practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Ansonia is weighted toward Clinical Social Worker (36 clinicians, followed by Professional Counselor with 19 and Pharmacist with 17). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Connecticut's population, Ansonia reports roughly 5.6 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Of Connecticut's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a Ansonia practice address, a coverage gap Ansonia patients typically fill by traveling to a larger nearby hub.

For Ansonia patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Ansonia, CT?

There are 203 registered healthcare providers in Ansonia, CT, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Ansonia?

The most common specialties in Ansonia are Clinical Social Worker, Professional Counselor, Pharmacist, Pediatrics Physician, Internal Medicine Physician. Clinical Social Worker has the most providers with 36.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.