Dr. Leonard M. Zir, MD
- Medicare services, 2020
- 1,061
- Part D claims, 2024
- 30
- Industry payments
- $30
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 300 Mount Auburn St, Cambridge, MA 02138-5600
- Practice phone
- Call (671) 499-5005
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Macro - Primary Care - Cambridge (Mount Auburn St)
Primary care practice · Cambridge, Massachusetts
Find Dr. Zir'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. Leonard M. Zir is a cardiologist in Cambridge, Massachusetts
Dr. Zir practices at Macro - Primary Care - Cambridge (Mount Auburn St) in Cambridge, Massachusetts.
Dr. Zir's NPI, 1275509150, was assigned on February 28, 2006. Dr. Zir holds Massachusetts license 34331.
- NPI
- 1275509150NPI Registry (opens in a new tab)
- NPI enumeration date
- February 28, 2006
- NPI status
- Active
- Practice phone
- (671) 499-5005
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leonard M. Zir practices at 2 locations in Cambridge, Massachusetts
Dr. Zir's primary practice is Macro - Primary Care - Cambridge (Mount Auburn St), at 300 Mount Auburn St, Cambridge, MA 02138-5600. The practice phone is (671) 499-5005. The NPI Registry lists Dr. Zir's practice address as 330 Mt Auburn St, Cambridge, MA 02138.
- Macro - Primary Care - Cambridge (Mount Auburn St)Primary300 Mount Auburn St, Cambridge, MA 02138-5600Phone(671) 499-5005
- NPI Registry address330 Mt Auburn St, Cambridge, MA 02138 · Middlesex CountyPhone(617) 497-1560
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Leonard M. Zir is affiliated with 1 site of care and 1 medical group
Dr. Zir's primary practice is Macro - Primary Care - Cambridge (Mount Auburn St) in Cambridge, Massachusetts. The medical group on file is Mount Auburn Cardiology Associates, Inc.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Leonard M. Zir's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zir practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Macro - Primary Care - Cambridge (Mount Auburn St) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leonard M. Zir is one of 840 cardiologists in Massachusetts
Cardiovascular disease is Dr. Zir's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Zir is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near Dr. Zir
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. Leonard M. Zir billed Medicare for 1,061 services in 2020
CMS data shows 1,061 Medicare services from Dr. Zir across 6 procedure codes in 2020. Medicare paid $23,633 for them.
Dr. Zir's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Tests and treatments
- 2019: 2,4112020: 83166%
- Office and hospital visits
- 2019: 5682020: 23060%
- Drugs given in the office
- 2019: 2562020: 0100%
- Imaging
- 2019: 962020: 0100%
- Other services
- 2019: 2532020: 0100%
Where Dr. Zir's Medicare services took place, 2020
- In an office24923%
- In a facility81277%
Dr. Zir compared with the Massachusetts median for cardiologists, 2020
- Dr. Zir
- Massachusetts median
- Medicare services
- 1,061vs 1,61234% below
- Part D claims
- 15vs 84698% below
Medians across 817 cardiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Zir's most billed Medicare procedure codes, 2020
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. Zir?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zir and other cardiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leonard M. Zir's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Zir's median patient age at 76, with 38% women.
Dr. Zir's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women38%
- Men63%
Source: Dmand AI Patient Panel Data
Dr. Leonard M. Zir wrote 30 Medicare Part D claims in 2024
In 2024, Dr. Zir wrote 30 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $757 in total drug cost. In 2020, CMS named 977 claims across 19 drugs.
Dr. Zir's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 9772021: 1598%
Drugs named by CMS: 1 in 2021, 19 in 2020.
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
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Dr. Leonard M. Zir received $30 in industry payments from 2016 to 2019
CMS Open Payments shows 2 general payments to Dr. Zir from 2 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $16.
General payments to Dr. Zir by program year, 2016 to 2019
Companies that paid Dr. Zir the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Leonard M. Zir'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| 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. Leonard M. Zir
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. Leonard M. Zir's NPI number?
Dr. Leonard M. Zir's NPI number is 1275509150. It was assigned on February 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard M. Zir?
Dr. Leonard M. Zir is a cardiologist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Leonard M. Zir practice?
Dr. Zir practices at 300 Mount Auburn St, Cambridge, MA 02138-5600. Dr. Zir also practices at 330 Mt Auburn St, Cambridge, MA 02138. Dr. Zir's primary practice is Macro - Primary Care - Cambridge (Mount Auburn St) in Cambridge, Massachusetts.
What is Dr. Leonard M. Zir's office phone number?
The practice phone on file for Dr. Zir is (671) 499-5005.
What is Dr. Leonard M. Zir's medical license number?
Dr. Zir holds Massachusetts license 34331.
What medical group is Dr. Leonard M. Zir part of?
Dr. Zir is linked to Mount Auburn Cardiology Associates, Inc.
Does Dr. Leonard M. Zir accept Medicare?
Yes. CMS data shows Dr. Zir billed Medicare for 1,061 services in 2020.
What services does Dr. Leonard M. Zir bill to Medicare?
In 2020, Dr. Zir's most billed Medicare services were heart test or procedure (93010), office visit, established patient (99214) and care management and other visits (99443).
What drugs does Dr. Leonard M. Zir prescribe most?
In 2021 Medicare Part D data, Dr. Zir's most prescribed drugs by claims were Metoprolol Succinate.
Has Dr. Leonard M. Zir received payments from drug or device companies?
CMS Open Payments shows $30 in general payments to Dr. Zir from 2 companies from 2016 to 2019. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Leonard M. Zir been practicing?
Dr. Zir's NPI was assigned in 2006.
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