Stephen Mark Chrzanowski, PhD
- Part D claims, 2024
- 175
- Industry payments
- $4,479
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2018
- Practice address
- 55 North Ave, Mendon, MA 01756
- Practice phone
- Call (508) 334-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Umass Memorial Medical Center
Mendon, Massachusetts
Find Stephen Chrzanowski'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 Mark Chrzanowski is a neurologist in Mendon, Massachusetts
Stephen Chrzanowski practices at Umass Memorial Medical Center in Mendon, Massachusetts.
Stephen Chrzanowski's NPI, 1427552835, was assigned on March 20, 2018. Stephen Chrzanowski graduated from University of Florida College of Medicine in 2018. Stephen Chrzanowski holds Massachusetts license 291047.
- NPI
- 1427552835NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274078670
- NPI enumeration date
- March 20, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (508) 334-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Stephen Mark Chrzanowski practices at Umass Memorial Medical Center in Mendon, Massachusetts
Stephen Chrzanowski's primary practice is Umass Memorial Medical Center, at 55 North Ave, Mendon, MA 01756 in Worcester County. The practice phone is (508) 334-1000.
- Umass Memorial Medical Center55 North Ave, Mendon, MA 01756 · Worcester CountyPhone(508) 334-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Stephen Mark Chrzanowski is affiliated with 1 site of care and 1 medical group
Stephen Chrzanowski's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. The medical group on file is UMass Memorial Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Stephen Mark Chrzanowski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephen Chrzanowski practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Umass Memorial Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Stephen Mark Chrzanowski is one of 806 neurologists in Massachusetts
Neurology is Stephen Chrzanowski's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Stephen Chrzanowski is licensed in Massachusetts.
Specialties and state licenses
- Neurology, MassachusettsPrimary
Neurologists near Stephen Chrzanowski
Counts of neurologists 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 Mark Chrzanowski's patients have a median age of 18
Across all payers, Dmand AI patient panel data puts Stephen Chrzanowski's median patient age at 18, with 4% women.
Stephen Chrzanowski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 18
Patient panel by sex, all payers
- Women4%
- Men91%
Source: Dmand AI Patient Panel Data
Stephen Mark Chrzanowski wrote 175 Medicare Part D claims in 2024
In 2024, Stephen Chrzanowski wrote 175 Medicare Part D claims for 26 patients. 82% of them were for generic drugs. CMS names the drug for 100 of them, across 4 drugs with 11 or more claims each, at $3,020 in total drug cost. In 2021, CMS named 11 claims across 1 drug.
Stephen Chrzanowski's Part D claims by kind of drug, 2024
- Generic143 claims82%
- Brand-name32 claims18%
Stephen Chrzanowski's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2024
- 2021
- 2024
- Claims for drugs CMS names
- 2021: 112024: 100809%
Drugs named by CMS: 4 in 2024, 1 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Stephen Mark Chrzanowski takes part in Medicare
Stephen Chrzanowski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Stephen Mark Chrzanowski received $4,479 in industry payments from 2024 to 2025
CMS Open Payments shows 11 general payments to Stephen Chrzanowski from 4 drug and device companies from 2024 to 2025. Consulting fees make up the largest share, 78% of the total. ITF Therapeutics LLC paid the most, $4,199.
General payments to Stephen Chrzanowski by program year, 2024 to 2025
General payments to Stephen Chrzanowski by kind, 2024 to 2025
- Consulting fees$3,51078%
- Travel and lodging$56913%
- Food and beverage$4009%
Companies that paid Stephen Chrzanowski the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Stephen Mark Chrzanowski graduated from University of Florida College of Medicine
Stephen Chrzanowski graduated from University of Florida College of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Stephen Mark Chrzanowski'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 Mark Chrzanowski
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 Mark Chrzanowski's NPI number?
Stephen Mark Chrzanowski's NPI number is 1427552835. It was assigned on March 20, 2018, and it is active in the NPI Registry.
What does Stephen Mark Chrzanowski specialize in?
Stephen Mark Chrzanowski is a neurologist in Mendon, Massachusetts. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Stephen Mark Chrzanowski practice?
Stephen Chrzanowski practices at 55 North Ave, Mendon, MA 01756. Stephen Chrzanowski's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts.
What is Stephen Mark Chrzanowski's office phone number?
The practice phone on file for Stephen Chrzanowski is (508) 334-1000.
What is Stephen Mark Chrzanowski's medical license number?
Stephen Chrzanowski holds Massachusetts license 291047.
What medical group is Stephen Mark Chrzanowski part of?
Stephen Chrzanowski is linked to UMass Memorial Medical Group.
Does Stephen Mark Chrzanowski accept Medicare?
Yes. CMS lists Stephen Chrzanowski as accepting Medicare assignment.
Where did Stephen Mark Chrzanowski go to medical school?
Stephen Chrzanowski graduated from University of Florida College of Medicine in 2018.
What drugs does Stephen Mark Chrzanowski prescribe most?
In 2024 Medicare Part D data, Stephen Chrzanowski's most prescribed drugs by claims were Prednisone, Mycophenolate Mofetil and Pyridostigmine Bromide.
Has Stephen Mark Chrzanowski received payments from drug or device companies?
CMS Open Payments shows $4,479 in general payments to Stephen Chrzanowski from 4 companies from 2024 to 2025. The largest total came from ITF Therapeutics LLC.
How long has Stephen Mark Chrzanowski been practicing?
Stephen Chrzanowski graduated from medical school in 2018, 8 years ago.
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