Stephen J. Kowalczyk, DDS
Prosthodontics · Danbury, CT
Stephen J. Kowalczyk, DDS is a prosthodontics with a practice address in Danbury, Connecticut, and NPI 1285767632, issued on Mar 14, 2007. Check the license (Connecticut 9122, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephen J. Kowalczyk
- Credential
- DDS
- Primary taxonomy
- Prosthodontics 1223P0700X
- License number
- 9122 CT
Self-reported in NPPES; status is on the state search - Practice location
- 57 North St Ste 121, Danbury, CT 06810
- Phone
- (203) 744-7310
- Enumerated
- Mar 14, 2007
- Record last updated
- Apr 9, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest prosthodontics records → All 62 in Connecticut → Look up another NPI →
Also registered at 57 North St Ste 121
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Arcadipane, D.M.D.General Practice Dentistry1871638858
Verify Stephen J. Kowalczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 9122Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average prosthodontics in 2024
127 Medicare Part D claims for 71 beneficiaries, against an average of 90 among the 1,779 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin74 claims
- Chlorhexidine Gluconate27 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Stephen J. Kowalczyk among 62 prosthodontics records in Connecticut
Stephen J. Kowalczyk, DDS is one of 62 prosthodontics records with a practice address in Connecticut. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 24% of them.
- NPI issued2007 · 24% of these records are older, 39% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileNo · 2% of these records are
- Record last updated2018 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0700X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Prosthodontics providers in Connecticut
There are 62 prosthodontics records in Connecticut.
All 62 in Connecticut → Every provider in Danbury → Prosthodontics nationwide →
The 8 prosthodontics records with the nearest ZIP codes
- Benjanin Frank, D.D.S.Danbury, CT 068101063802221
- Ervin Braun, DMDDarien, CT 068201326268020
- Michael Nishi, DDSDarien, CT 068201275547341
- Steven Rothenberg, D.M.D.Darien, CT 068201841404290
- Pablo Cuevas, DDSFairfield, CT 068241295954469
- Paul Dengelegi, DMDFairfield, CT 068241093877946
- Min-Sung Yoon, D.D.S.Fairfield, CT 068241619997004
- Gary Horblitt, MAXILLOPROSTHODONTISFairfield, CT 068251366651663
Common questions
What is Stephen J. Kowalczyk, DDS's NPI number?
Stephen J. Kowalczyk, DDS's National Provider Identifier (NPI) is 1285767632, issued on Mar 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen J. Kowalczyk, DDS located?
The NPPES record lists a practice address at 57 North St Ste 121, Danbury, CT, 06810. Phone: (203) 744-7310. Providers update this record themselves, so call before visiting.
How can I verify Stephen J. Kowalczyk, DDS's license?
NPPES lists Connecticut license number 9122, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Stephen J. Kowalczyk, DDS prescribe under Medicare Part D?
In 2024, Stephen J. Kowalczyk, DDS had 127 Medicare Part D claims for 71 beneficiaries; the average among prosthodontics prescribers was 90. Part D covers Medicare prescriptions 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.