Louis Ostrowsky
- Medicare services, 2024
- 36
- Medicare patients, 2024
- 14
- Publications
- 1
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 1493 Cambridge Street, Cambridge, MA 02139
- Practice phone
- Call (617) 665-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Louis Ostrowsky'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.
Louis Ostrowsky is a psychiatrist in Cambridge, Massachusetts
Louis Ostrowsky practices at CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
Louis Ostrowsky's NPI, 1306135082, was assigned on April 1, 2011. Louis Ostrowsky graduated from Northwestern University Feinberg Medical School in 2011. Louis Ostrowsky holds Massachusetts license 257561.
- NPI
- 1306135082NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880994128
- NPI enumeration date
- April 1, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 665-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Louis Ostrowsky practices at CHA Cambridge Hospital in Cambridge, Massachusetts
Louis Ostrowsky's primary practice is CHA Cambridge Hospital, at 1493 Cambridge Street, Cambridge, MA 02139 in Middlesex County. The practice phone is (617) 665-1000.
- CHA Cambridge Hospital1493 Cambridge Street, Cambridge, MA 02139 · Middlesex CountyPhone(617) 665-1000
Source: Dmand AI Affiliation Data
Louis Ostrowsky is affiliated with 1 site of care and 1 medical group
Louis Ostrowsky's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. The medical group on file is Cambridge Health Alliance. Louis Ostrowsky's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Louis Ostrowsky's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Louis Ostrowsky practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CHA Cambridge 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 Cambridge Health Alliance and 6.2K+ hospitals, with verified contacts in the same login.
Louis Ostrowsky is one of 1,857 psychiatrists in Massachusetts
Psychiatry is Louis Ostrowsky's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Louis Ostrowsky is licensed in Massachusetts.
Specialties and state licenses
- Psychiatry, MassachusettsPrimary
Psychiatrists near Louis Ostrowsky
Counts of psychiatrists 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
Louis Ostrowsky billed Medicare for 36 services in 2024
CMS data shows 36 Medicare services from Louis Ostrowsky across 1 procedure code in 2024, for 14 Medicare patients. Medicare paid $1,524 for them. Every service was in a facility, such as a hospital, rather than an office.
Louis Ostrowsky's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 652024: 3645%
Louis Ostrowsky compared with the Massachusetts median for psychiatrists, 2024
- Louis Ostrowsky
- Massachusetts median
- Medicare services
- 36vs 17279% below
- Medicare patients
- 14vs 4267% below
Medians across 2,056 psychiatrists in Massachusetts with Dmand AI profiles that report each measure.
Louis Ostrowsky's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Louis Ostrowsky and other psychiatrists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Louis Ostrowsky treated 14 Medicare patients in 2024, average age 74
CMS counts 14 Medicare patients who saw Louis Ostrowsky in 2024. 75% of them have high blood pressure, and 75% have schizophrenia and other psychoses. Their average risk score is 1.94, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Louis Ostrowsky's median patient age at 22, with 43% women.
Chronic conditions among Louis Ostrowsky's Medicare patients, 2024
- High blood pressure75%
- Schizophrenia and other psychoses75%
Share of Medicare patients with each condition. A patient can have several.
Louis Ostrowsky's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 22
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Louis Ostrowsky scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Louis Ostrowsky for performance year 2024, reported as part of a group. Louis Ostrowsky accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Louis Ostrowsky's MIPS scores, performance year 2024
- 91of 100Final score
- 77.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 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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Louis Ostrowsky has 1 publication on record
Dmand AI links 1 paper to Louis Ostrowsky in 2017. Louis Ostrowsky's most frequent co-authors are Elisa Kuo-Min Cheng, MD and Margaret Spottswood, MD.
Louis Ostrowsky's most frequent co-authors
Recent publications by Louis Ostrowsky
See who Louis Ostrowsky researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Louis Ostrowsky works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Louis Ostrowsky received $100 in industry payments in 2022
CMS Open Payments shows 1 general payment to Louis Ostrowsky from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. ITI, Inc. paid the most, $100.
Companies that paid Louis Ostrowsky the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Louis Ostrowsky graduated from Northwestern University Feinberg Medical School
Louis Ostrowsky graduated from Northwestern University Feinberg Medical School in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Louis Ostrowsky'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Louis Ostrowsky
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Louis Ostrowsky's NPI number?
Louis Ostrowsky's NPI number is 1306135082. It was assigned on April 1, 2011, and it is active in the NPI Registry.
What does Louis Ostrowsky specialize in?
Louis Ostrowsky is a psychiatrist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Louis Ostrowsky practice?
Louis Ostrowsky practices at 1493 Cambridge Street, Cambridge, MA 02139. Louis Ostrowsky's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
What is Louis Ostrowsky's office phone number?
The practice phone on file for Louis Ostrowsky is (617) 665-1000.
What is Louis Ostrowsky's medical license number?
Louis Ostrowsky holds Massachusetts license 257561.
Which hospitals is Louis Ostrowsky affiliated with?
Louis Ostrowsky practices at CHA Cambridge Hospital in Cambridge, Massachusetts.
What medical group is Louis Ostrowsky part of?
Louis Ostrowsky is linked to Cambridge Health Alliance.
Does Louis Ostrowsky accept Medicare?
Yes. CMS data shows Louis Ostrowsky billed Medicare for 36 services in 2024, and Louis Ostrowsky accepts Medicare assignment.
What is Louis Ostrowsky's MIPS score?
Louis Ostrowsky's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Louis Ostrowsky see?
CMS counts 14 Medicare patients who saw Louis Ostrowsky in 2024, with an average age of 74.
Show 6 more questionsShow fewer questions
What services does Louis Ostrowsky bill to Medicare?
In 2024, Louis Ostrowsky's most billed Medicare services were hospital inpatient care (99231).
Where did Louis Ostrowsky go to medical school?
Louis Ostrowsky graduated from Northwestern University Feinberg Medical School in 2011.
Has Louis Ostrowsky received payments from drug or device companies?
CMS Open Payments shows $100 in general payments to Louis Ostrowsky from 1 company from 2022 to 2022. The largest total came from ITI, Inc.
How long has Louis Ostrowsky been practicing?
Louis Ostrowsky graduated from medical school in 2011, 15 years ago.
Does Louis Ostrowsky do research?
Dmand AI links 1 publication to Louis Ostrowsky.
Who does Louis Ostrowsky publish with?
Louis Ostrowsky's most frequent co-authors are Elisa Kuo-Min Cheng, MD (1 shared paper) and Margaret Spottswood, MD (1 shared paper).
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