Dr. Thomas Aaron Risser, MD
- Medicare services, 2024
- 306
- Medicare patients, 2024
- 232
- Part D claims, 2024
- 944
- 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 Dr. Risser's professional email, personal email and mobile number
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Dr. Thomas Aaron Risser is a cardiologist in Cambridge, Massachusetts
Dr. Risser practices at CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
Dr. Risser's NPI, 1245296342, was assigned on April 26, 2006. Dr. Risser graduated from Pennsylvania State University College of Medicine in 1972. Dr. Risser holds Massachusetts license 42679.
- NPI
- 1245296342NPI Registry (opens in a new tab)
- NPI enumeration date
- April 26, 2006
- NPI status
- Active
- Practice phone
- (617) 665-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas Aaron Risser practices at CHA Cambridge Hospital in Cambridge, Massachusetts
Dr. Risser'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
Dr. Thomas Aaron Risser is affiliated with 1 site of care and 1 medical group
Dr. Risser's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. The medical group on file is Cambridge Health Alliance. Dr. Risser'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 Dr. Thomas Aaron Risser's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Risser 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
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Dr. Thomas Aaron Risser is one of 840 cardiologists in Massachusetts
Cardiovascular disease is Dr. Risser's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Risser is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near Dr. Risser
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
Dr. Thomas Aaron Risser billed Medicare for 306 services in 2024
CMS data shows 306 Medicare services from Dr. Risser across 7 procedure codes in 2024, for 232 Medicare patients. Medicare paid $21,541 for them.
Dr. Risser's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2772024: 2674%
- Tests and treatments
- 2023: 1762024: 3978%
Where Dr. Risser's Medicare services took place, 2024
- In an office155%
- In a facility29195%
Dr. Risser compared with the Massachusetts median for cardiologists, 2024
- Dr. Risser
- Massachusetts median
- Medicare services
- 306vs 1,61281% below
- Medicare patients
- 232vs 95676% below
- Part D claims
- 821vs 846Close to median
Medians across 817 cardiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Risser'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. Risser and other cardiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Aaron Risser treated 232 Medicare patients in 2024, average age 75
CMS counts 232 Medicare patients who saw Dr. Risser in 2024. The largest group is 65 to 74, with 92 patients. 75% of them have high blood pressure, and 61% have high cholesterol. 53% are also on Medicaid. Their average risk score is 1.96, 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. Risser's median patient age at 69, with 41% women.
Dr. Risser's Medicare patients by age, 2024
Dr. Risser's Medicare patients by sex, 2024
- Women12253%
- Men11047%
Chronic conditions among Dr. Risser's Medicare patients, 2024
- High blood pressure75%
- High cholesterol61%
- Ischemic heart disease50%
- Diabetes45%
- Mood disorders44%
- Atrial fibrillation42%
- Heart failure39%
- Chronic kidney disease38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Risser's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Aaron Risser wrote 944 Medicare Part D claims in 2024
In 2024, Dr. Risser wrote 944 Medicare Part D claims for 174 patients. 76% of them were for generic drugs. CMS names the drug for 821 of them, across 23 drugs with 11 or more claims each, at $231,249 in total drug cost. In 2023, CMS named 866 claims across 22 drugs.
Dr. Risser's Part D claims by kind of drug, 2024
- Generic716 claims76%
- Brand-name228 claims24%
Dr. Risser'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8662024: 8215%
Drugs named by CMS: 23 in 2024, 22 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. Thomas Aaron Risser 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 Dr. Risser for performance year 2024, reported as part of a group.
Dr. Risser'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.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Thomas Aaron Risser received $579 in industry payments from 2016 to 2024
CMS Open Payments shows 5 general payments to Dr. Risser from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $239.
General payments to Dr. Risser by program year, 2016 to 2024
Companies that paid Dr. Risser 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. Thomas Aaron Risser graduated from Pennsylvania State University College of Medicine
Dr. Risser graduated from Pennsylvania State University College of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Aaron Risser'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 | Clinician Public Reporting: Overall MIPS Performance (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. Thomas Aaron Risser
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. Thomas Aaron Risser's NPI number?
Dr. Thomas Aaron Risser's NPI number is 1245296342. It was assigned on April 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Aaron Risser?
Dr. Thomas Aaron Risser is a cardiologist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Thomas Aaron Risser practice?
Dr. Risser practices at 1493 Cambridge Street, Cambridge, MA 02139. Dr. Risser's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
What is Dr. Thomas Aaron Risser's office phone number?
The practice phone on file for Dr. Risser is (617) 665-1000.
What is Dr. Thomas Aaron Risser's medical license number?
Dr. Risser holds Massachusetts license 42679.
Which hospitals is Dr. Thomas Aaron Risser affiliated with?
Dr. Risser practices at CHA Cambridge Hospital in Cambridge, Massachusetts.
What medical group is Dr. Thomas Aaron Risser part of?
Dr. Risser is linked to Cambridge Health Alliance.
Does Dr. Thomas Aaron Risser accept Medicare?
Yes. CMS data shows Dr. Risser billed Medicare for 306 services in 2024.
What is Dr. Thomas Aaron Risser's MIPS score?
Dr. Risser's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Thomas Aaron Risser see?
CMS counts 232 Medicare patients who saw Dr. Risser in 2024, with an average age of 75.
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What services does Dr. Thomas Aaron Risser bill to Medicare?
In 2024, Dr. Risser's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and heart test or procedure (93010).
Where did Dr. Thomas Aaron Risser go to medical school?
Dr. Risser graduated from Pennsylvania State University College of Medicine in 1972.
What drugs does Dr. Thomas Aaron Risser prescribe most?
In 2024 Medicare Part D data, Dr. Risser's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Eliquis.
Has Dr. Thomas Aaron Risser received payments from drug or device companies?
CMS Open Payments shows $579 in general payments to Dr. Risser from 3 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. Thomas Aaron Risser been practicing?
Dr. Risser graduated from medical school in 1972, 54 years ago.
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