Dr. Mark Chrostowski, MD
- Medicare services, 2024
- 95
- Medicare patients, 2024
- 252
- Hospital affiliations
- 1
- Industry payments
- $1,388
- Medical group
- 1
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Mark Chrostowski is an anesthesiologist in Greenwich, Connecticut
Dr. Chrostowski practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Chrostowski's NPI, 1558317040, was assigned on May 26, 2006. Dr. Chrostowski graduated from JS Weill Medical College, Cornell University in 2004. Dr. Chrostowski holds Massachusetts license 228369.
- NPI
- 1558317040NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648375410
- NPI enumeration date
- May 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Chrostowski practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Chrostowski's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Dr. Mark Chrostowski is affiliated with 1 site of care and 1 medical group
Dr. Chrostowski's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Greenwich Anesthesiology Associates.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Chrostowski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chrostowski practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Chrostowski is one of 654 anesthesiologists in Connecticut
Anesthesiology is Dr. Chrostowski's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Chrostowski is licensed in Massachusetts.
Specialties and state licenses
- Anesthesiology, MassachusettsPrimary
Anesthesiologists near Dr. Chrostowski
Counts of anesthesiologists 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
Dr. Mark Chrostowski billed Medicare for 95 services in 2024
CMS data shows 95 Medicare services from Dr. Chrostowski across 4 procedure codes in 2024, for 252 Medicare patients. Medicare paid $7,420 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chrostowski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 902024: 956%
- Imaging
- 2023: 112024: 0100%
- Surgery
- 2023: 372024: 0100%
Dr. Chrostowski compared with the Connecticut median for anesthesiologists, 2024
- Dr. Chrostowski
- Connecticut median
- Medicare services
- 95vs 897% above
- Medicare patients
- 252vs 16057% above
Medians across 636 anesthesiologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Chrostowski'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.
Need commercial claims for Dr. Chrostowski?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chrostowski and other anesthesiologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Chrostowski treated 252 Medicare patients in 2024, average age 77
CMS counts 252 Medicare patients who saw Dr. Chrostowski in 2024. The largest group is 75 to 84, with 104 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chrostowski's median patient age at 55, with 74% women.
Dr. Chrostowski's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chrostowski's Medicare patients by sex, 2024
- Women14758%
- Men10542%
Chronic conditions among Dr. Chrostowski's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis61%
- Ischemic heart disease28%
- Atrial fibrillation27%
- Cancer23%
- Heart failure21%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chrostowski'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
- Women74%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Mark Chrostowski takes part in Medicare
Dr. Chrostowski 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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Dr. Mark Chrostowski received $1,388 in industry payments from 2016 to 2024
CMS Open Payments shows 16 general payments to Dr. Chrostowski from 3 drug and device companies from 2016 to 2024. Travel and lodging make up the largest share, 50% of the total. Pacira Pharmaceuticals Incorporated paid the most, $1,302.
General payments to Dr. Chrostowski by program year, 2016 to 2024
General payments to Dr. Chrostowski by kind, 2016 to 2024
- Travel and lodging$69650%
- Food and beverage$69350%
Companies that paid Dr. Chrostowski the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Chrostowski graduated from JS Weill Medical College, Cornell University
Dr. Chrostowski graduated from JS Weill Medical College, Cornell University in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Chrostowski'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) |
| 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 Dr. Mark Chrostowski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Chrostowski's NPI number?
Dr. Mark Chrostowski's NPI number is 1558317040. It was assigned on May 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Chrostowski?
Dr. Mark Chrostowski is an anesthesiologist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark Chrostowski practice?
Dr. Chrostowski practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Chrostowski's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
What is Dr. Mark Chrostowski's office phone number?
The practice phone on file for Dr. Chrostowski is (203) 863-3000.
What is Dr. Mark Chrostowski's medical license number?
Dr. Chrostowski holds Massachusetts license 228369.
Which hospitals is Dr. Mark Chrostowski affiliated with?
Dr. Chrostowski practices at Greenwich Hospital in Greenwich, Connecticut.
What medical group is Dr. Mark Chrostowski part of?
Dr. Chrostowski is linked to Greenwich Anesthesiology Associates.
Does Dr. Mark Chrostowski accept Medicare?
Yes. CMS data shows Dr. Chrostowski billed Medicare for 95 services in 2024, and Dr. Chrostowski accepts Medicare assignment.
How many Medicare patients does Dr. Mark Chrostowski see?
CMS counts 252 Medicare patients who saw Dr. Chrostowski in 2024, with an average age of 77.
What services does Dr. Mark Chrostowski bill to Medicare?
In 2024, Dr. Chrostowski's most billed Medicare services were anesthesia (00142), anesthesia (01214) and anesthesia (00811).
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Where did Dr. Mark Chrostowski go to medical school?
Dr. Chrostowski graduated from JS Weill Medical College, Cornell University in 2004.
Has Dr. Mark Chrostowski received payments from drug or device companies?
CMS Open Payments shows $1,388 in general payments to Dr. Chrostowski from 3 companies from 2016 to 2024. The largest total came from Pacira Pharmaceuticals Incorporated.
How long has Dr. Mark Chrostowski been practicing?
Dr. Chrostowski graduated from medical school in 2004, 22 years ago.
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