Dr. Marc S. Kowalsky, MD
- Medicare services, 2024
- 5,778
- Medicare patients, 2024
- 455
- Part D claims, 2024
- 477
- Publications
- 12
- MIPS score, 2024
- 84
- Practice address
- 200 First Stamford Place, Suite 210, Stamford, CT 06902
- Practice phone
- Call (203) 252-5400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stamford ASC
Surgery Center - Medicare-Certified · Stamford, Connecticut
Find Dr. Kowalsky'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.
Dr. Marc S. Kowalsky is an orthopedic surgeon in Stamford, Connecticut
Dr. Kowalsky practices at Stamford ASC in Stamford, Connecticut.
Dr. Kowalsky's NPI, 1699941823, was assigned on May 7, 2008. Dr. Kowalsky graduated from Tufts University School Of Medicine in 2003. Dr. Kowalsky holds Connecticut license 50484.
- NPI
- 1699941823NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7113070020
- NPI enumeration date
- May 7, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 252-5400
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marc S. Kowalsky practices at Stamford ASC in Stamford, Connecticut
Dr. Kowalsky's primary practice is Stamford ASC, at 200 First Stamford Place, Suite 210, Stamford, CT 06902. The practice phone is (203) 252-5400.
- Stamford ASC200 First Stamford Place, Suite 210, Stamford, CT 06902Phone(203) 252-5400
Source: Dmand AI Affiliation Data
Dr. Marc S. Kowalsky is affiliated with 7 sites of care and 3 medical groups
Dr. Kowalsky's primary practice is Stamford ASC in Stamford, Connecticut. Dr. Kowalsky is also affiliated with Greenwich Hospital. The medical group on file is Orthopaedic and Neurosurgery Specialists. Dmand AI also links Dr. Kowalsky to 1 more hospital, 3 group practices and clinics, 2 medical groups and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marc S. Kowalsky's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kowalsky practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stamford ASC | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marc S. Kowalsky is one of 300 orthopedic surgeons in Connecticut
Orthopaedic surgery is Dr. Kowalsky's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Kowalsky is licensed in Connecticut.
Specialties and state licenses
- Orthopaedic surgery, ConnecticutPrimary
Orthopedic surgeons near Dr. Kowalsky
Counts of orthopedic surgeons 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. Marc S. Kowalsky billed Medicare for 5,778 services in 2024
CMS data shows 5,778 Medicare services from Dr. Kowalsky across 19 procedure codes in 2024, for 455 Medicare patients. Medicare paid $121,563 for them.
Dr. Kowalsky's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2522024: 4,0381502%
- Office and hospital visits
- 2023: 6302024: 6463%
- Imaging
- 2023: 4662024: 4844%
- Tests and treatments
- 2023: 1,2152024: 39967%
- Surgery
- 2023: 2112024: 211No change
Where Dr. Kowalsky's Medicare services took place, 2024
- In an office5,74599%
- In a facility331%
Dr. Kowalsky compared with the Connecticut median for orthopedic surgeons, 2024
- Dr. Kowalsky
- Connecticut median
- Medicare services
- 5,778vs 8646.7 times
- Medicare patients
- 455vs 2072.2 times
- Part D claims
- 436vs 1223.6 times
Medians across 297 orthopedic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Kowalsky'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 Dr. Kowalsky and other orthopedic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marc S. Kowalsky treated 455 Medicare patients in 2024, average age 75
CMS counts 455 Medicare patients who saw Dr. Kowalsky in 2024. The largest group is 65 to 74, with 226 patients. 75% of them have high cholesterol, and 70% have arthritis. 3% are also on Medicaid. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kowalsky's median patient age at 54, with 44% women.
Dr. Kowalsky's Medicare patients by age, 2024
Dr. Kowalsky's Medicare patients by sex, 2024
- Women26358%
- Men19242%
Chronic conditions among Dr. Kowalsky's Medicare patients, 2024
- High cholesterol75%
- Arthritis70%
- High blood pressure63%
- Anxiety24%
- Ischemic heart disease23%
- Mood disorders22%
- Osteoporosis22%
- Cancer20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kowalsky's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women44%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marc S. Kowalsky wrote 477 Medicare Part D claims in 2024
In 2024, Dr. Kowalsky wrote 477 Medicare Part D claims for 263 patients. 100% of them were for generic drugs. CMS names the drug for 436 of them, across 5 drugs with 11 or more claims each, at $2,528 in total drug cost. In 2023, CMS named 403 claims across 5 drugs.
Dr. Kowalsky'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.
Drug classes CMS tracks in Dr. Kowalsky's Part D claims, 2024
- Opioids4%17 of 477 claims
- Antibiotics3%12 of 477 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4032024: 4368%
Drugs named by CMS: 5 in 2024, 5 in 2023.
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
Dr. Marc S. Kowalsky scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Kowalsky for performance year 2024, reported as part of a group. Dr. Kowalsky accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 17 procedures of upper limb (arm) arthroscopy (minimally invasive joint repair) by Dr. Kowalsky, more than 58% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Kowalsky's MIPS scores, performance year 2024
- 84of 100Final score
- 82.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 65of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Kowalsky ranks in Medicare procedure volume
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 58th percentile17 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Marc S. Kowalsky has 12 publications on record
Dmand AI links 12 papers to Dr. Kowalsky, published from 2011 to 2024. 2023 was the busiest year, with 3. The most frequent topics are Arthroscopy, Radiography and Range of Motion, Articular. Dr. Kowalsky has published most often in Arthrosc Sports Med Rehabil. Dr. Kowalsky's most frequent co-authors are Paul M. Sethi, MD, Katherine Bardzik Vadasdi, MD and Jay Donovan Keener, MD.
Dr. Kowalsky's papers by year, 2011 to 2024
Topics Dr. Kowalsky writes about most
- Arthroscopy
- Radiography
- Range of Motion, Articular
- Recovery of Function
- Shoulder Joint
Dr. Kowalsky's most frequent co-authors
- Paul M. Sethi, MD7 shared papers
- Katherine Bardzik Vadasdi, MD3 shared papers
- Jay Donovan Keener, MD2 shared papers
Recent publications by Dr. Kowalsky
J Shoulder Elbow Surg
See who Dr. Kowalsky researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kowalsky works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Marc S. Kowalsky received $10,158 in industry payments from 2016 to 2025
CMS Open Payments shows 46 general payments to Dr. Kowalsky from 12 drug and device companies from 2016 to 2025. Education make up the largest share, 40% of the total. Arthrex, Inc. paid the most, $5,103.
General payments to Dr. Kowalsky by program year, 2016 to 2025
General payments to Dr. Kowalsky by kind, 2016 to 2025
- Education$4,02840%
- Travel and lodging$3,63636%
- Food and beverage$2,49425%
Companies that paid Dr. Kowalsky the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marc S. Kowalsky graduated from Tufts University School Of Medicine
Dr. Kowalsky graduated from Tufts University School Of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marc S. Kowalsky'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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Dr. Marc S. Kowalsky
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. Marc S. Kowalsky's NPI number?
Dr. Marc S. Kowalsky's NPI number is 1699941823. It was assigned on May 7, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Marc S. Kowalsky?
Dr. Marc S. Kowalsky is an orthopedic surgeon in Stamford, Connecticut. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Marc S. Kowalsky practice?
Dr. Kowalsky practices at 200 First Stamford Place, Suite 210, Stamford, CT 06902. Dr. Kowalsky's primary practice is Stamford ASC in Stamford, Connecticut. Dmand AI also links Dr. Kowalsky to 1 hospital, 3 group practices and clinics, 2 medical groups and 1 home health agency.
What is Dr. Marc S. Kowalsky's office phone number?
The practice phone on file for Dr. Kowalsky is (203) 252-5400.
What is Dr. Marc S. Kowalsky's medical license number?
Dr. Kowalsky holds Connecticut license 50484.
Which hospitals is Dr. Marc S. Kowalsky affiliated with?
Dr. Kowalsky is affiliated with Greenwich Hospital. Dmand AI links Dr. Kowalsky to 1 more hospital.
What medical group is Dr. Marc S. Kowalsky part of?
Dr. Kowalsky is linked to Orthopaedic and Neurosurgery Specialists. Dmand AI links Dr. Kowalsky to 2 more medical groups.
Does Dr. Marc S. Kowalsky accept Medicare?
Yes. CMS data shows Dr. Kowalsky billed Medicare for 5,778 services in 2024, and Dr. Kowalsky accepts Medicare assignment.
What is Dr. Marc S. Kowalsky's MIPS score?
Dr. Kowalsky's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Marc S. Kowalsky see?
CMS counts 455 Medicare patients who saw Dr. Kowalsky in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Marc S. Kowalsky bill to Medicare?
In 2024, Dr. Kowalsky's most billed Medicare services were injected or infused drug (J1010), office visit, established patient (99213) and diagnostic imaging (73030).
Where did Dr. Marc S. Kowalsky go to medical school?
Dr. Kowalsky graduated from Tufts University School Of Medicine in 2003.
What drugs does Dr. Marc S. Kowalsky prescribe most?
In 2024 Medicare Part D data, Dr. Kowalsky's most prescribed drugs by claims were Meloxicam, Celecoxib and Methylprednisolone.
Has Dr. Marc S. Kowalsky received payments from drug or device companies?
CMS Open Payments shows $10,158 in general payments to Dr. Kowalsky from 12 companies from 2016 to 2025. The largest total came from Arthrex, Inc.
How long has Dr. Marc S. Kowalsky been practicing?
Dr. Kowalsky graduated from medical school in 2003, 23 years ago.
Does Dr. Marc S. Kowalsky do research?
Dmand AI links 12 publications to Dr. Kowalsky, published from 2011 to 2024.
Who does Dr. Marc S. Kowalsky publish with?
Dr. Kowalsky's most frequent co-authors are Paul M. Sethi, MD (7 shared papers), Katherine Bardzik Vadasdi, MD (3 shared papers) and Jay Donovan Keener, MD (2 shared papers).
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