Dr. Geoffrey S. Hirsowitz, MD
- Medicare services, 2024
- 654
- Medicare patients, 2024
- 241
- Part D claims, 2024
- 686
- Industry payments
- $251
- Affiliated sites
- 1
- Practice address
- 111 Grossman Dr, Braintree, MA 02184
- Practice phone
- Call (617) 421-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Harvard Vanguard Medical Associates
Braintree, Massachusetts
Find Dr. Hirsowitz'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. Geoffrey S. Hirsowitz is a cardiologist in Braintree, Massachusetts
Dr. Hirsowitz practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts.
Dr. Hirsowitz's NPI, 1649299744, was assigned on July 19, 2006. Dr. Hirsowitz holds Massachusetts license 79629.
- NPI
- 1649299744NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385681253
- NPI enumeration date
- July 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 421-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Geoffrey S. Hirsowitz practices at Harvard Vanguard Medical Associates in Braintree, Massachusetts
Dr. Hirsowitz's primary practice is Harvard Vanguard Medical Associates, at 111 Grossman Dr, Braintree, MA 02184 in Norfolk County. The practice phone is (617) 421-1000.
- Harvard Vanguard Medical Associates111 Grossman Dr, Braintree, MA 02184 · Norfolk CountyPhone(617) 421-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Geoffrey S. Hirsowitz is affiliated with 2 sites of care and 1 medical group
Dr. Hirsowitz's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. The medical group on file is Atrius Health. Dmand AI also links Dr. Hirsowitz to 1 more group practice or clinic, 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. Geoffrey S. Hirsowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hirsowitz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Harvard Vanguard Medical Associates | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Geoffrey S. Hirsowitz is one of 840 cardiologists in Massachusetts
Cardiovascular disease is Dr. Hirsowitz's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Hirsowitz is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near Dr. Hirsowitz
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. Geoffrey S. Hirsowitz billed Medicare for 654 services in 2024
CMS data shows 654 Medicare services from Dr. Hirsowitz across 15 procedure codes in 2024, for 241 Medicare patients. Medicare paid $47,394 for them. Every service was in an office.
Dr. Hirsowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 7782024: 23170%
- Lab and pathology
- 2023: 3382024: 20539%
- Office and hospital visits
- 2023: 2272024: 14835%
- Surgery
- 2023: 992024: 7029%
Dr. Hirsowitz compared with the Massachusetts median for cardiologists, 2024
- Dr. Hirsowitz
- Massachusetts median
- Medicare services
- 654vs 1,61259% below
- Medicare patients
- 241vs 95675% below
- Part D claims
- 572vs 84632% below
Medians across 817 cardiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Hirsowitz'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Geoffrey S. Hirsowitz treated 241 Medicare patients in 2024, average age 76
CMS counts 241 Medicare patients who saw Dr. Hirsowitz in 2024. The largest group is 75 to 84, with 114 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hirsowitz's median patient age at 71, with 50% women.
Dr. Hirsowitz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hirsowitz's Medicare patients by sex, 2024
- Women11849%
- Men12351%
Chronic conditions among Dr. Hirsowitz's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis32%
- Ischemic heart disease30%
- Atrial fibrillation29%
- Chronic kidney disease26%
- Diabetes26%
- Mood disorders24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hirsowitz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Geoffrey S. Hirsowitz wrote 686 Medicare Part D claims in 2024
In 2024, Dr. Hirsowitz wrote 686 Medicare Part D claims for 207 patients. 80% of them were for generic drugs. CMS names the drug for 572 of them, across 12 drugs with 11 or more claims each, at $94,292 in total drug cost. In 2023, CMS named 1,755 claims across 30 drugs.
Dr. Hirsowitz's Part D claims by kind of drug, 2024
- Generic550 claims80%
- Brand-name136 claims20%
Dr. Hirsowitz'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: 1,7552024: 57267%
Drugs named by CMS: 12 in 2024, 30 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
How Dr. Geoffrey S. Hirsowitz takes part in Medicare
Dr. Hirsowitz 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. Geoffrey S. Hirsowitz received $251 in industry payments from 2018 to 2019
CMS Open Payments shows 2 general payments to Dr. Hirsowitz from 2 drug and device companies from 2018 to 2019. Food and beverage make up the largest share, 100% of the total. Medtronic Vascular, Inc. paid the most, $127.
General payments to Dr. Hirsowitz by program year, 2018 to 2019
Companies that paid Dr. Hirsowitz the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Geoffrey S. Hirsowitz'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Geoffrey S. Hirsowitz
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. Geoffrey S. Hirsowitz's NPI number?
Dr. Geoffrey S. Hirsowitz's NPI number is 1649299744. It was assigned on July 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Geoffrey S. Hirsowitz?
Dr. Geoffrey S. Hirsowitz is a cardiologist in Braintree, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Geoffrey S. Hirsowitz practice?
Dr. Hirsowitz practices at 111 Grossman Dr, Braintree, MA 02184. Dr. Hirsowitz's primary practice is Harvard Vanguard Medical Associates in Braintree, Massachusetts. Dmand AI also links Dr. Hirsowitz to 1 group practice or clinic.
What is Dr. Geoffrey S. Hirsowitz's office phone number?
The practice phone on file for Dr. Hirsowitz is (617) 421-1000.
What is Dr. Geoffrey S. Hirsowitz's medical license number?
Dr. Hirsowitz holds Massachusetts license 79629.
What medical group is Dr. Geoffrey S. Hirsowitz part of?
Dr. Hirsowitz is linked to Atrius Health.
Does Dr. Geoffrey S. Hirsowitz accept Medicare?
Yes. CMS data shows Dr. Hirsowitz billed Medicare for 654 services in 2024, and Dr. Hirsowitz accepts Medicare assignment.
How many Medicare patients does Dr. Geoffrey S. Hirsowitz see?
CMS counts 241 Medicare patients who saw Dr. Hirsowitz in 2024, with an average age of 76.
What services does Dr. Geoffrey S. Hirsowitz bill to Medicare?
In 2024, Dr. Hirsowitz's most billed Medicare services were heart test or procedure (93306), office visit, established patient (99214) and surgery: heart and blood vessels (36415).
What drugs does Dr. Geoffrey S. Hirsowitz prescribe most?
In 2024 Medicare Part D data, Dr. Hirsowitz's most prescribed drugs by claims were Metoprolol Succinate, Eliquis and Atorvastatin Calcium.
Has Dr. Geoffrey S. Hirsowitz received payments from drug or device companies?
CMS Open Payments shows $251 in general payments to Dr. Hirsowitz from 2 companies from 2018 to 2019. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Geoffrey S. Hirsowitz been practicing?
Dr. Hirsowitz graduated from medical school in 1975, 51 years ago.
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