Dr. Mark S. Itzkowitz, MD
- Medicare services, 2022
- 218
- Part D claims, 2023
- 14
- Hospital affiliations
- 1
- Industry payments
- $178
- State license
- 1
- Practice address
- 41 Highland Avenue, Winchester, MA 01890
- Practice phone
- Call (781) 729-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Itzkowitz's professional email, personal email and mobile number
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Dr. Mark S. Itzkowitz is an internist in Winchester, Massachusetts
Dr. Itzkowitz practices at Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health.
Dr. Itzkowitz's NPI, 1184663270, was assigned on June 5, 2006. Dr. Itzkowitz graduated from George Washington University School of Medicine in 1991. Dr. Itzkowitz holds Massachusetts license 160775.
- NPI
- 1184663270NPI Registry (opens in a new tab)
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Practice phone
- (781) 729-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark S. Itzkowitz practices at Winchester Hospital in Winchester, Massachusetts
Dr. Itzkowitz's primary practice is Winchester Hospital, at 41 Highland Avenue, Winchester, MA 01890 in Middlesex County. The practice phone is (781) 729-9000.
- Winchester Hospital41 Highland Avenue, Winchester, MA 01890 · Middlesex CountyPhone(781) 729-9000
Source: Dmand AI Affiliation Data
Dr. Mark S. Itzkowitz is affiliated with 1 site of care
Dr. Itzkowitz's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark S. Itzkowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Itzkowitz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark S. Itzkowitz is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Itzkowitz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Itzkowitz is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Itzkowitz
Counts of internists 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. Mark S. Itzkowitz billed Medicare for 218 services in 2022
CMS data shows 218 Medicare services from Dr. Itzkowitz across 4 procedure codes in 2022. Medicare paid $10,612 for them. Every service was in an office.
Dr. Itzkowitz's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 5002022: 14172%
- Surgery
- 2021: 2542022: 6176%
- Tests and treatments
- 2021: 652022: 1675%
- Other services
- 2021: 422022: 0100%
Dr. Itzkowitz compared with the Massachusetts median for internists, 2022
- Dr. Itzkowitz
- Massachusetts median
- Medicare services
- 218vs 43149% below
- Part D claims
- 14vs 40297% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Itzkowitz's most billed Medicare procedure codes, 2022
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. Itzkowitz and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark S. Itzkowitz's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Itzkowitz's median patient age at 73, with 28% women.
Dr. Itzkowitz'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
- Women28%
- Men67%
Source: Dmand AI Patient Panel Data
Dr. Mark S. Itzkowitz wrote 14 Medicare Part D claims in 2023
In 2023, Dr. Itzkowitz wrote 14 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $156 in total drug cost. In 2022, CMS named 1,217 claims across 41 drugs.
Dr. Itzkowitz's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 1,2172023: 1499%
Drugs named by CMS: 1 in 2023, 41 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Mark S. Itzkowitz received $178 in industry payments from 2017 to 2021
CMS Open Payments shows 5 general payments to Dr. Itzkowitz from 3 drug and device companies from 2017 to 2021. Food and beverage make up the largest share, 83% of the total. Hologic Inc paid the most, $125.
General payments to Dr. Itzkowitz by program year, 2017 to 2021
General payments to Dr. Itzkowitz by kind, 2017 to 2021
- Food and beverage$14883%
- Consulting fees$3017%
Companies that paid Dr. Itzkowitz the most, 2017 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark S. Itzkowitz graduated from George Washington University School of Medicine
Dr. Itzkowitz graduated from George Washington University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark S. Itzkowitz'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Mark S. Itzkowitz
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. Mark S. Itzkowitz's NPI number?
Dr. Mark S. Itzkowitz's NPI number is 1184663270. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark S. Itzkowitz?
Dr. Mark S. Itzkowitz is an internist in Winchester, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark S. Itzkowitz practice?
Dr. Itzkowitz practices at 41 Highland Avenue, Winchester, MA 01890. Dr. Itzkowitz's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health.
What is Dr. Mark S. Itzkowitz's office phone number?
The practice phone on file for Dr. Itzkowitz is (781) 729-9000.
What is Dr. Mark S. Itzkowitz's medical license number?
Dr. Itzkowitz holds Massachusetts license 160775.
Which hospitals is Dr. Mark S. Itzkowitz affiliated with?
Dr. Itzkowitz practices at Winchester Hospital in Winchester, Massachusetts.
Does Dr. Mark S. Itzkowitz accept Medicare?
Yes. CMS data shows Dr. Itzkowitz billed Medicare for 218 services in 2022.
What services does Dr. Mark S. Itzkowitz bill to Medicare?
In 2022, Dr. Itzkowitz's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, established patient (99215).
Where did Dr. Mark S. Itzkowitz go to medical school?
Dr. Itzkowitz graduated from George Washington University School of Medicine in 1991.
What drugs does Dr. Mark S. Itzkowitz prescribe most?
In 2023 Medicare Part D data, Dr. Itzkowitz's most prescribed drugs by claims were Atorvastatin Calcium.
Has Dr. Mark S. Itzkowitz received payments from drug or device companies?
CMS Open Payments shows $178 in general payments to Dr. Itzkowitz from 3 companies from 2017 to 2021. The largest total came from Hologic Inc.
How long has Dr. Mark S. Itzkowitz been practicing?
Dr. Itzkowitz graduated from medical school in 1991, 35 years ago.
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