Dr. Harry Ma, MD, PhD
- Medicare services, 2024
- 3,257
- Medicare patients, 2024
- 425
- Part D claims, 2024
- 362
- Publications
- 7
- MIPS score, 2024
- 98
- Practice address
- 6 Research Dr, Shelton, CT 06484
- Practice phone
- Call (401) 315-9575
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The Vascular Experts - Rhode Island
Shelton, Connecticut
Find Dr. Ma'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. Harry Ma is a vascular surgeon in Shelton, Connecticut
Dr. Ma practices at The Vascular Experts - Rhode Island in Shelton, Connecticut.
Dr. Ma's NPI, 1174763957, was assigned on March 6, 2009. Dr. Ma graduated from Albert Einstein College of Medicine in 2004. Dr. Ma's Connecticut license number on file is 55618.
- NPI
- 1174763957NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911043351
- NPI enumeration date
- March 6, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (401) 315-9575
- 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 Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Harry Ma practices at The Vascular Experts - Rhode Island in Shelton, Connecticut
Dr. Ma's primary practice is The Vascular Experts - Rhode Island, at 6 Research Dr, Shelton, CT 06484 in Greater Bridgeport County. The practice phone is (401) 315-9575.
- The Vascular Experts - Rhode Island6 Research Dr, Shelton, CT 06484 · Greater Bridgeport CountyPhone(401) 315-9575
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Harry Ma is affiliated with 8 sites of care and 2 medical groups
Dr. Ma's primary practice is The Vascular Experts - Rhode Island in Shelton, Connecticut. Dr. Ma is also affiliated with Lawrence + Memorial Hospital. The medical group on file is The Vascular Experts. Dmand AI also links Dr. Ma to 4 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Harry Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Vascular Experts - Rhode Island | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Harry Ma is one of 82 vascular surgeons in Connecticut
Vascular surgery is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Dr. Ma is board certified in vascular surgery by the American Board of Surgery. Dmand AI has Dr. Ma's licenses on file in 5 states: Connecticut, Rhode Island, Oklahoma, Massachusetts and New York.
Specialties and state licenses
- Vascular surgery, ConnecticutPrimary
- Rhode Island license
- Oklahoma license
- Surgery, Massachusetts
- New York license
Clinical focus
Dmand AI lists amputation, arterial blot clot /embolism, blood vessel access for dialysis, carotid revascularization, chronic skin ulcer, heart device and aorta surgery, leg revascularization and lymphedema among the conditions Dr. Ma treats.
Vascular surgeons near Dr. Ma
Counts of vascular 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. Harry Ma billed Medicare for 3,257 services in 2024
CMS data shows 3,257 Medicare services from Dr. Ma across 25 procedure codes in 2024, for 425 Medicare patients. Medicare paid $300,133 for them.
Dr. Ma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 1,5602024: 1,83318%
- Tests and treatments
- 2023: 9762024: 63335%
- Office and hospital visits
- 2023: 4532024: 50311%
- Surgery
- 2023: 2262024: 15830%
- Imaging
- 2023: 1512024: 13014%
Where Dr. Ma's Medicare services took place, 2024
- In an office3,20999%
- In a facility481%
Dr. Ma compared with the Connecticut median for vascular surgeons, 2024
- Dr. Ma
- Connecticut median
- Medicare services
- 3,257vs 8553.8 times
- Medicare patients
- 425vs 27654% above
- Part D claims
- 332vs 913.6 times
Medians across 80 vascular surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Ma'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. Ma?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ma and other vascular surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harry Ma treated 425 Medicare patients in 2024, average age 75
CMS counts 425 Medicare patients who saw Dr. Ma in 2024. The largest group is 75 to 84, with 170 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 2.36, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ma's median patient age at 73, with 51% women.
Dr. Ma's Medicare patients by age, 2024
Dr. Ma's Medicare patients by sex, 2024
- Women21851%
- Men20749%
Chronic conditions among Dr. Ma's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Ischemic heart disease40%
- Chronic kidney disease39%
- Diabetes37%
- Anxiety32%
- Atrial fibrillation30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ma's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Harry Ma wrote 362 Medicare Part D claims in 2024
In 2024, Dr. Ma wrote 362 Medicare Part D claims for 122 patients. 51% of them were for generic drugs. CMS names the drug for 332 of them, across 7 drugs with 11 or more claims each, at $187,900 in total drug cost. In 2023, CMS named 264 claims across 6 drugs.
Dr. Ma's Part D claims by kind of drug, 2024
- Generic183 claims51%
- Brand-name179 claims49%
Dr. Ma'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. Ma's Part D claims, 2024
- Opioids10%35 of 362 claims
- Antibiotics4%16 of 362 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: 2642024: 33226%
Drugs named by CMS: 7 in 2024, 6 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. Harry Ma scored 98 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Ma for performance year 2024, reported as part of a group. Dr. Ma accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 33 procedures of leg revascularization (restoring blood flow) by Dr. Ma, more than 90% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Ma's MIPS scores, performance year 2024
- 98of 100Final score
- 88of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Ma ranks in Medicare procedure volume
- Varicose vein removal
- 74th percentile50 procedures
- Leg revascularization (restoring blood flow)
- 90th percentile33 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 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. Harry Ma has 7 publications on record
Dmand AI links 7 papers to Dr. Ma, published from 2012 to 2017. 2017 was the busiest year, with 2. The most frequent topics are Angioplasty, Balloon, Intermittent Claudication and Ischemia. Dr. Ma has published most often in Ann Vasc Surg. Dr. Ma's most frequent co-authors are John Blebea, MD, Mark David Iafrati, MD and Rafael Demarchi Malgor, MD.
Dr. Ma's papers by year, 2012 to 2017
Topics Dr. Ma writes about most
- Angioplasty, Balloon
- Intermittent Claudication
- Ischemia
- Stents
Dr. Ma's most frequent co-authors
- John Blebea, MD3 shared papers
- Mark David Iafrati, MD2 shared papers
- Rafael Demarchi Malgor, MD2 shared papers
Recent publications by Dr. Ma
Ann Vasc Surg
J Vasc Surg Venous Lymphat Disord
See who Dr. Ma researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ma works with, so you can find a warm path to the right vascular surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Harry Ma received $51,849 in industry payments from 2016 to 2025
CMS Open Payments shows 396 general payments to Dr. Ma from 42 drug and device companies from 2016 to 2025. Device or supply loans make up the largest share, 69% of the total. AngioDynamics, Inc. paid the most, $35,757.
General payments to Dr. Ma by program year, 2016 to 2025
General payments to Dr. Ma by kind, 2016 to 2025
- Device or supply loans$35,61169%
- Food and beverage$14,34628%
- Travel and lodging$1,3933%
- Consulting fees$5001%
Companies that paid Dr. Ma 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. Harry Ma graduated from Albert Einstein College of Medicine
Dr. Ma graduated from Albert Einstein College of Medicine in 2004.
- Medical school
- Board certified in vascular surgery
Source: Dmand AI Professional Profile Data
Dr. Harry Ma accepts plans from 18 insurance carriers
Dr. Ma is in network with 18 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +10 more carriersWith a free account
Plan types Dr. Ma accepts, by number of carriers
- PPO11
- Medicare10
- HMO8
- POS5
- EPO4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Harry Ma'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 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Harry Ma
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. Harry Ma's NPI number?
Dr. Harry Ma's NPI number is 1174763957. It was assigned on March 6, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Harry Ma?
Dr. Harry Ma is a vascular surgeon in Shelton, Connecticut. The primary specialty in the NPI Registry is Vascular Surgery Physician (taxonomy code 2086S0129X).
Where does Dr. Harry Ma practice?
Dr. Ma practices at 6 Research Dr, Shelton, CT 06484. Dr. Ma's primary practice is The Vascular Experts - Rhode Island in Shelton, Connecticut. Dmand AI also links Dr. Ma to 4 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Harry Ma's office phone number?
The practice phone on file for Dr. Ma is (401) 315-9575.
What is Dr. Harry Ma's medical license number?
Dr. Ma's Connecticut license number on file is 55618, one of the licenses on file in 5 states.
Which states has Dr. Harry Ma been licensed in?
Dmand AI has state licenses on file for Dr. Ma in Connecticut (2016 to 2025), Rhode Island (2016 to 2026), Oklahoma (2013 to 2017), Massachusetts (2009 to 2014) and New York (2008 to 2010).
Which hospitals is Dr. Harry Ma affiliated with?
Dr. Ma is affiliated with Lawrence + Memorial Hospital. Dmand AI links Dr. Ma to 4 more hospitals.
What medical group is Dr. Harry Ma part of?
Dr. Ma is linked to The Vascular Experts. Dmand AI links Dr. Ma to 1 more medical group.
Does Dr. Harry Ma accept Medicare?
Yes. CMS data shows Dr. Ma billed Medicare for 3,257 services in 2024, and Dr. Ma accepts Medicare assignment.
What is Dr. Harry Ma's MIPS score?
Dr. Ma's MIPS final score for performance year 2024 is 98 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Harry Ma see?
CMS counts 425 Medicare patients who saw Dr. Ma in 2024, with an average age of 75.
Is Dr. Harry Ma board certified?
Yes. Dr. Ma is board certified in vascular surgery by the American Board of Surgery.
What services does Dr. Harry Ma bill to Medicare?
In 2024, Dr. Ma's most billed Medicare services were medicare temporary code (Q9967), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Harry Ma go to medical school?
Dr. Ma graduated from Albert Einstein College of Medicine in 2004.
What drugs does Dr. Harry Ma prescribe most?
In 2024 Medicare Part D data, Dr. Ma's most prescribed drugs by claims were Xarelto, Clopidogrel and Eliquis.
Has Dr. Harry Ma received payments from drug or device companies?
CMS Open Payments shows $51,849 in general payments to Dr. Ma from 42 companies from 2016 to 2025. The largest total came from AngioDynamics, Inc.
How long has Dr. Harry Ma been practicing?
Dr. Ma graduated from medical school in 2004, 22 years ago.
Does Dr. Harry Ma do research?
Dmand AI links 7 publications to Dr. Ma, published from 2012 to 2017.
Who does Dr. Harry Ma publish with?
Dr. Ma's most frequent co-authors are John Blebea, MD (3 shared papers), Mark David Iafrati, MD (2 shared papers) and Rafael Demarchi Malgor, MD (2 shared papers).
What insurance does Dr. Harry Ma accept?
Dr. Ma is in network with 18 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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