Stephen C. Kwasniewski, PA
- Medicare patients, 2024
- 122
- Part D claims, 2024
- 298
- MIPS score, 2024
- 81
- Hospital affiliations
- 2
- Industry payments
- $23
- Practice address
- 2500 Morris Ave, Union, NJ 07083
- Practice phone
- Call (738) 906-9600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Redefine Healthcare
Union, New Jersey
Find Stephen Kwasniewski'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.
Stephen C. Kwasniewski is a physician assistant in Union, New Jersey
Stephen Kwasniewski practices at Redefine Healthcare in Union, New Jersey.
Stephen Kwasniewski's NPI, 1639265408, was assigned on October 5, 2006. Stephen Kwasniewski holds New Jersey license 25MP00107800.
- NPI
- 1639265408NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739072927
- NPI enumeration date
- October 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (738) 906-9600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Stephen C. Kwasniewski practices at Redefine Healthcare in Union, New Jersey
Stephen Kwasniewski's primary practice is Redefine Healthcare, at 2500 Morris Ave, Union, NJ 07083 in Union County. The practice phone is (738) 906-9600.
- Redefine Healthcare2500 Morris Ave, Union, NJ 07083 · Union CountyPhone(738) 906-9600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Stephen C. Kwasniewski is affiliated with 7 sites of care and 4 medical groups
Stephen Kwasniewski's primary practice is Redefine Healthcare in Union, New Jersey. Stephen Kwasniewski is also affiliated with Hospital of the University of Pennsylvania. The medical group on file is Redefine Healthcare. Dmand AI also links Stephen Kwasniewski to 1 more hospital, 4 group practices and clinics and 3 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Stephen C. Kwasniewski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephen Kwasniewski practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Redefine Healthcare | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Stephen C. Kwasniewski is one of 2,975 physician assistants in New Jersey
Physician assistant is Stephen Kwasniewski's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Stephen Kwasniewski is licensed in New Jersey.
Specialties and state licenses
- Physician assistant, New JerseyPrimary
Physician assistants near Stephen Kwasniewski
Counts of physician assistants 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
Stephen C. Kwasniewski treated 122 Medicare patients in 2024, average age 74
CMS counts 122 Medicare patients who saw Stephen Kwasniewski in 2024. The largest group is 65 to 74, with 61 patients. 75% of them have arthritis, and 75% have high cholesterol. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Stephen Kwasniewski's median patient age at 55, with 55% women.
Stephen Kwasniewski's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Stephen Kwasniewski's Medicare patients by sex, 2024
- Women8670%
- Men3630%
Chronic conditions among Stephen Kwasniewski's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure71%
- Anxiety37%
- Ischemic heart disease32%
- Mood disorders30%
- Depression27%
- Osteoporosis27%
Share of Medicare patients with each condition. A patient can have several.
Stephen Kwasniewski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Stephen C. Kwasniewski wrote 298 Medicare Part D claims in 2024
In 2024, Stephen Kwasniewski wrote 298 Medicare Part D claims for 165 patients. 98% of them were for generic drugs.
Stephen Kwasniewski's Part D claims by kind of drug, 2024
- Generic292 claims98%
- Brand-name and other6 claims2%
Drug classes CMS tracks in Stephen Kwasniewski's Part D claims, 2024
- Opioids17%51 of 298 claims
- Antibiotics10%29 of 298 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
Stephen C. Kwasniewski scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Stephen Kwasniewski for performance year 2024, reported as part of a group. Stephen Kwasniewski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Stephen Kwasniewski's MIPS scores, performance year 2024
- 81of 100Final score
- 62.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Stephen C. Kwasniewski received $23 in industry payments in 2025
CMS Open Payments shows 1 general payment to Stephen Kwasniewski from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Radius Health, Inc. paid the most, $23.
Companies that paid Stephen Kwasniewski 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 Stephen C. Kwasniewski'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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 Stephen C. Kwasniewski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Stephen C. Kwasniewski's NPI number?
Stephen C. Kwasniewski's NPI number is 1639265408. It was assigned on October 5, 2006, and it is active in the NPI Registry.
What does Stephen C. Kwasniewski specialize in?
Stephen C. Kwasniewski is a physician assistant in Union, New Jersey. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Stephen C. Kwasniewski practice?
Stephen Kwasniewski practices at 2500 Morris Ave, Union, NJ 07083. Stephen Kwasniewski's primary practice is Redefine Healthcare in Union, New Jersey. Dmand AI also links Stephen Kwasniewski to 1 hospital, 4 group practices and clinics and 3 medical groups.
What is Stephen C. Kwasniewski's office phone number?
The practice phone on file for Stephen Kwasniewski is (738) 906-9600.
What is Stephen C. Kwasniewski's medical license number?
Stephen Kwasniewski holds New Jersey license 25MP00107800.
Which hospitals is Stephen C. Kwasniewski affiliated with?
Stephen Kwasniewski is affiliated with Hospital of the University of Pennsylvania. Dmand AI links Stephen Kwasniewski to 1 more hospital.
What medical group is Stephen C. Kwasniewski part of?
Stephen Kwasniewski is linked to Redefine Healthcare. Dmand AI links Stephen Kwasniewski to 3 more medical groups.
Does Stephen C. Kwasniewski accept Medicare?
Yes. CMS lists Stephen Kwasniewski as accepting Medicare assignment.
What is Stephen C. Kwasniewski's MIPS score?
Stephen Kwasniewski's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
How many Medicare patients does Stephen C. Kwasniewski see?
CMS counts 122 Medicare patients who saw Stephen Kwasniewski in 2024, with an average age of 74.
Has Stephen C. Kwasniewski received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Stephen Kwasniewski from 1 company from 2025 to 2025. The largest total came from Radius Health, Inc.
How long has Stephen C. Kwasniewski been practicing?
Stephen Kwasniewski graduated from medical school in 2003, 23 years ago.
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