NPI registry status
Active
2026 NPPES data Prosthodontics NPI 1285767632 DDS
Verify on CMS → Stephen Kowalczyk, DDS
Prosthodontics in Danbury, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,510 in Prosthodontics, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
132
Medicare Part D claims · 71 beneficiaries · Prosthodontics avg: 85
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Stephen Kowalczyk, DDS filed 132 Medicare Part D claims in 2023 as a Prosthodontics in Danbury, Connecticut.
- 132
- Part D claims, 2023
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Stephen Kowalczyk, DDS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
132 35th percentile higher than 35% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Stephen Kowalczyk, DDS?
Quality data not reportedPrimary specialty
Prosthodontics
Medicare Part D claims
132 55% vs specialty avg
Specialty distribution in Connecticut
How Prosthodontics compares to other specialties among Connecticut providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Prosthodontics. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Stephen Kowalczyk, DDS appears in the CMS NPPES registry as a Prosthodontics provider holding DDS credentials at 57 NORTH ST STE 121, Danbury, CT, 06810, with a listed phone of (203) 744-7310. NPI 1285767632 was issued on 03/14/2007.
Medicare Part D records for calendar year 2023 show 132 prescription claims written by this provider, covering 71 Medicare beneficiaries and totaling roughly $545 in drug spend.
Prosthodontics is a narrow specialty nationwide, with 3,510 enrolled providers across 51 states and an average of 85 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1285767632 |
|---|---|
| Specialty | Prosthodontics |
| Credentials | DDS |
| Gender | Male |
| NPI Issued | 03/14/2007 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
132
Total Claims
$545
Total Drug Cost
71
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 136
- Total Day Supply
- 1,329
- Generic Drug Cost
- $476
- Antibiotic Claims
- 96
Patient Demographics
- Average Patient Age
- 78.5 years
- Avg HCC Risk Score
- 1.22
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Amoxicillin | 83 |
| Chlorhexidine Gluconate | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Prosthodontics Overview
How Stephen Kowalczyk, DDS fits within the Prosthodontics landscape nationally.
3,510
Prosthodontics Providers in US
51
States with Prosthodontics
85
Avg Claims per Provider
Stephen Kowalczyk, DDS's 132 claims are above the specialty average of 85.
Nearby Prosthodontics Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Kowalczyk.
Dr. John Agar
DDS
Farmington, CT
Dr. Jean Amara
D.M.D., M.SC.D.
Rocky Hill, CT
Dr. Marjorie Barndt
D.M.D., MDSC
Waterford, CT
Dr. Avinash Bidra
BDS, MS, FACP
Glastonbury, CT
Dr. Ervin Braun
DMD
Darien, CT
Compare Prosthodontics nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Prosthodontics peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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How to Find a Doctor
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Connecticut
Frequently Asked Questions
What is Stephen Kowalczyk, DDS's specialty? ▼
Stephen Kowalczyk, DDS specializes in Prosthodontics and practices in Danbury, Connecticut. Credentials: DDS.
How much does Stephen Kowalczyk, DDS prescribe under Medicare Part D? ▼
In 2023, Stephen Kowalczyk, DDS wrote 132 Medicare Part D claims totaling $545 in drug costs for 71 beneficiaries.
Where is Stephen Kowalczyk, DDS located? ▼
Stephen Kowalczyk, DDS is located at 57 NORTH ST STE 121, Danbury, CT, 06810. Phone: (203) 744-7310.
What is Stephen Kowalczyk, DDS's NPI number? ▼
Stephen Kowalczyk, DDS's National Provider Identifier (NPI) is 1285767632, issued on 03/14/2007.
How many Prosthodontics providers are there in the US? ▼
There are 3,510 Prosthodontics providers across 51 states in the US. The average Prosthodontics provider writes 85 Medicare Part D claims per year.
What drugs does Stephen Kowalczyk, DDS prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephen Kowalczyk, DDS's most frequently prescribed drugs include Amoxicillin, Chlorhexidine Gluconate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Kowalczyk, DDS accept Medicare? ▼
Stephen Kowalczyk, DDS appears in CMS Medicare data with 132 Part D claims and 71 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Kowalczyk, DDS's credentials? ▼
Stephen Kowalczyk, DDS's NPI is 1285767632 with credentials DDS. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.