Walter Kostrzewski, DMD
- Part D claims, 2024
- 73
- Industry payments
- $24
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Practice address
- 76 Stony Hill Rd, Bethel, CT 06801-3055
- Practice phone
- Call (203) 744-0033
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stony Hill Dental Care
Dental practice · Bethel, Connecticut
Find Walter Kostrzewski's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Walter Kostrzewski is a dentist in Danbury, Connecticut
Walter Kostrzewski practices at Stony Hill Dental Care in Bethel, Connecticut.
Walter Kostrzewski's NPI, 1649458910, was assigned on February 8, 2008. Walter Kostrzewski holds Connecticut license 7929.
- NPI
- 1649458910NPI Registry (opens in a new tab)
- NPI enumeration date
- February 8, 2008
- NPI status
- Active
- Practice phone
- (203) 744-0033
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Walter Kostrzewski practices in Bethel and Danbury
Walter Kostrzewski's primary practice is Stony Hill Dental Care, at 76 Stony Hill Rd, Bethel, CT 06801-3055. The practice phone is (203) 744-0033. The NPI Registry lists Walter Kostrzewski's practice address as 84 North St, Danbury, CT 06810.
- Stony Hill Dental CarePrimary76 Stony Hill Rd, Bethel, CT 06801-3055Phone(203) 744-0033
- NPI Registry address84 North St, Danbury, CT 06810 · Western Ct County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Walter Kostrzewski is affiliated with 2 sites of care and 1 medical group
Walter Kostrzewski's primary practice is Stony Hill Dental Care in Bethel, Connecticut. Dmand AI also links Walter Kostrzewski to 1 physician office and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Walter Kostrzewski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Walter Kostrzewski practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stony Hill Dental Care | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Walter Kostrzewski is one of 340 dentists in Connecticut
Dentist is Walter Kostrzewski's primary specialty in the NPI Registry, under taxonomy code 122300000X. Walter Kostrzewski is licensed in Connecticut.
Specialties and state licenses
- Dentist, ConnecticutPrimary
Dentists near Walter Kostrzewski
Counts of dentists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Walter Kostrzewski's patients have a median age of 23
Across all payers, Dmand AI patient panel data puts Walter Kostrzewski's median patient age at 23, with 100% women.
Walter Kostrzewski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 23
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Walter Kostrzewski wrote 73 Medicare Part D claims in 2024
In 2024, Walter Kostrzewski wrote 73 Medicare Part D claims for 38 patients. 71% of them were for generic drugs.
Walter Kostrzewski's Part D claims by kind of drug, 2024
- Generic52 claims71%
- Other21 claims29%
Drug classes CMS tracks in Walter Kostrzewski's Part D claims, 2024
- Antibiotics42%31 of 73 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Walter Kostrzewski received $24 in industry payments in 2025
CMS Open Payments shows 1 general payment to Walter Kostrzewski from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Dentsply Sirona Inc paid the most, $24.
Companies that paid Walter Kostrzewski the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Walter Kostrzewski's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Walter Kostrzewski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Walter Kostrzewski's NPI number?
Walter Kostrzewski's NPI number is 1649458910. It was assigned on February 8, 2008, and it is active in the NPI Registry.
What does Walter Kostrzewski specialize in?
Walter Kostrzewski is a dentist in Danbury, Connecticut. The primary specialty in the NPI Registry is Dentist (taxonomy code 122300000X).
Where does Walter Kostrzewski practice?
Walter Kostrzewski practices at 76 Stony Hill Rd, Bethel, CT 06801-3055. Walter Kostrzewski also practices at 84 North St, Danbury, CT 06810. Walter Kostrzewski's primary practice is Stony Hill Dental Care in Bethel, Connecticut. Dmand AI also links Walter Kostrzewski to 1 physician office and 1 medical group.
What is Walter Kostrzewski's office phone number?
The practice phone on file for Walter Kostrzewski is (203) 744-0033.
What is Walter Kostrzewski's medical license number?
Walter Kostrzewski holds Connecticut license 7929.
Has Walter Kostrzewski received payments from drug or device companies?
CMS Open Payments shows $24 in general payments to Walter Kostrzewski from 1 company from 2025 to 2025. The largest total came from Dentsply Sirona Inc.
How long has Walter Kostrzewski been practicing?
Walter Kostrzewski's NPI was assigned in 2008.
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