NPPES file of Aug 9, 2026

Stephen Richard Katz, D.D.S.

Dentist · Riverside, CT

Stephen Richard Katz, D.D.S. is a dentist with a practice address in Riverside, Connecticut, and NPI 1417109414, issued on Oct 21, 2008. Check the license (Connecticut 4221, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1417109414
Name
Stephen Richard Katz
Credential
D.D.S.
Primary taxonomy
Dentist 122300000X
License numbers
4221 CT
027578 NY
Self-reported in NPPES; status is on the state search
Practice location
10 Lake Dr S, Riverside, CT 06878
Phone
(203) 637-5521
Enumerated
Oct 21, 2008
Record last updated
Oct 10, 2012 (not updated in 14 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify Stephen Richard Katz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
    Search for license 4221
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Connecticut license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $37.50

1 payment: food and beverage; the largest payer was Solventum Corporation. The 31,974 providers of this specialty with any payment received $540.36 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Stephen Katz$37.50
  2. Specialty average$540.36

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Stephen Richard Katz among 862 dentist records in Connecticut

Stephen Richard Katz, D.D.S. is one of 862 dentist records with a practice address in Connecticut. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 45% of them.

  • NPI issued2008 · 45% of these records are older, 48% newer
  • In a Medicare fileYes · 61% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2012 · 75% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

2 dentist records list a practice address in Riverside

They are 2 of the 86 NPPES records with a practice address in Riverside, and 862 dentist records in Connecticut.

The 8 dentist records with the nearest ZIP codes

  1. Hochan Hwang, DDSRiverside, CT 068781104348960
  2. Ashfaq Ahmad, DMDRidgefield, CT 068771164734372
  3. Randall Baldwin, DMDRidgefield, CT 068771043556046
  4. Dana Bergenfeld, DDSRidgefield, CT 068771033888938
  5. Cheryl Doumar, DMDRidgefield, CT 068771902015571
  6. Kelsey Flanagan, DDSRidgefield, CT 068771962902221
  7. Josephine Franzese, D.M.D.Ridgefield, CT 068771033306006
  8. Jamar Jackson, DMDRidgefield, CT 068771356694897

Common questions

What is Stephen Richard Katz, D.D.S.'s NPI number?

Stephen Richard Katz, D.D.S.'s National Provider Identifier (NPI) is 1417109414, issued on Oct 21, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Richard Katz, D.D.S. located?

The NPPES record lists a practice address at 10 Lake Dr S, Riverside, CT, 06878. Phone: (203) 637-5521. Providers update this record themselves, so call before visiting.

How can I verify Stephen Richard Katz, D.D.S.'s license?

NPPES lists Connecticut license number 4221, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

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.