John Ostrominski
- Part D claims, 2024
- 213
- Hospital affiliations
- 1
- Industry payments
- $3,752
- State license
- 1
- Year NPI issued
- 2018
- Practice address
- 75 Francis Street, Boston, MA 02115
- Practice phone
- Call (617) 732-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Ostrominski'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.
John Ostrominski is a cardiologist in Concord, Massachusetts
John Ostrominski practices at Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
John Ostrominski's NPI, 1740770155, was assigned on May 11, 2018. John Ostrominski holds Massachusetts license 291118.
- NPI
- 1740770155NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709135957
- NPI enumeration date
- May 11, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 732-5500
- 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)
John Ostrominski practices in Boston and Concord
John Ostrominski's primary practice is Brigham and Women's Hospital, at 75 Francis Street, Boston, MA 02115 in Suffolk County. The practice phone is (617) 732-5500. The NPI Registry lists John Ostrominski's practice address as 133 Old Road To 9 Acre Cor, Concord, MA 01742.
- Brigham and Women's HospitalPrimary75 Francis Street, Boston, MA 02115 · Suffolk CountyPhone(617) 732-5500
- NPI Registry address133 Old Road To 9 Acre Cor, Concord, MA 01742 · Middlesex CountyPhone(617) 732-5500
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
John Ostrominski is affiliated with 1 site of care
John Ostrominski's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Ostrominski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Ostrominski practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Brigham and Women's Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
John Ostrominski is one of 840 cardiologists in Massachusetts
Cardiovascular disease is John Ostrominski's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. John Ostrominski is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near John Ostrominski
Counts of cardiologists 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
John Ostrominski's patients have a median age of 29
Across all payers, Dmand AI patient panel data puts John Ostrominski's median patient age at 29, with 100% women.
John Ostrominski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 29
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
John Ostrominski wrote 213 Medicare Part D claims in 2024
In 2024, John Ostrominski wrote 213 Medicare Part D claims for 55 patients. 63% of them were for generic drugs. CMS names the drug for 108 of them, across 7 drugs with 11 or more claims each, at $51,229 in total drug cost.
John Ostrominski's Part D claims by kind of drug, 2024
- Generic135 claims63%
- Brand-name78 claims37%
John Ostrominski'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.
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 John Ostrominski takes part in Medicare
John Ostrominski 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)
For MedTech and pharma teams
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John Ostrominski received $3,752 in industry payments in 2024
CMS Open Payments shows 22 general payments to John Ostrominski from 2 drug and device companies in 2024. Travel and lodging make up the largest share, 84% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $1,910.
General payments to John Ostrominski by kind, 2024 to 2024
- Travel and lodging$3,16184%
- Food and beverage$3168%
- Consulting fees$2757%
Companies that paid John Ostrominski the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John Ostrominski'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 DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| 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 John Ostrominski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Ostrominski's NPI number?
John Ostrominski's NPI number is 1740770155. It was assigned on May 11, 2018, and it is active in the NPI Registry.
What does John Ostrominski specialize in?
John Ostrominski is a cardiologist in Concord, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does John Ostrominski practice?
John Ostrominski practices at 75 Francis Street, Boston, MA 02115. John Ostrominski also practices at 133 Old Road To 9 Acre Cor, Concord, MA 01742. John Ostrominski's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
What is John Ostrominski's office phone number?
The practice phone on file for John Ostrominski is (617) 732-5500.
What is John Ostrominski's medical license number?
John Ostrominski holds Massachusetts license 291118.
Which hospitals is John Ostrominski affiliated with?
John Ostrominski practices at Brigham and Women's Hospital in Boston, Massachusetts.
Does John Ostrominski accept Medicare?
Yes. CMS lists John Ostrominski as accepting Medicare assignment.
What drugs does John Ostrominski prescribe most?
In 2024 Medicare Part D data, John Ostrominski's most prescribed drugs by claims were Rosuvastatin Calcium, Jardiance and Carvedilol.
Has John Ostrominski received payments from drug or device companies?
CMS Open Payments shows $3,752 in general payments to John Ostrominski from 2 companies from 2024 to 2024. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has John Ostrominski been practicing?
John Ostrominski's NPI was assigned in 2018.
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