Dr. Roman W. Mandzij, DO
- Medicare services, 2024
- 1,378
- Medicare patients, 2024
- 212
- Part D claims, 2024
- 2,617
- Hospital affiliations
- 2
- Industry payments
- $2,782
- Practice address
- 2215 Sanders Rd, Northbrook, IL 60062
- Practice phone
- Call (847) 501-5060
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Winnetka Avenue Physicians, SC
Northbrook, Illinois
Find Dr. Mandzij'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. Roman W. Mandzij is an internist in Northbrook, Illinois
Dr. Mandzij practices at Winnetka Avenue Physicians, SC in Northbrook, Illinois.
Dr. Mandzij's NPI, 1841239902, was assigned on June 5, 2006. Dr. Mandzij holds Illinois license 036-096445.
- NPI
- 1841239902NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7012927791
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 501-5060
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roman W. Mandzij practices at Winnetka Avenue Physicians, SC in Northbrook, Illinois
Dr. Mandzij's primary practice is Winnetka Avenue Physicians, SC, at 2215 Sanders Rd, Northbrook, IL 60062 in Cook County. The practice phone is (847) 501-5060.
- Winnetka Avenue Physicians, SC2215 Sanders Rd, Northbrook, IL 60062 · Cook CountyPhone(847) 501-5060
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Roman W. Mandzij is affiliated with 8 sites of care and 3 medical groups
Dr. Mandzij's primary practice is Winnetka Avenue Physicians, SC in Northbrook, Illinois. Dr. Mandzij is also affiliated with Evanston Hospital. The medical group on file is Winnetka Avenue Physicians. Dmand AI also links Dr. Mandzij to 1 more hospital, 3 group practices and clinics, 2 home health agencies and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Roman W. Mandzij's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mandzij practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winnetka Avenue Physicians, SC | Available with a free account |
| +7 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roman W. Mandzij is one of 5,652 internists in Illinois
Internal medicine is Dr. Mandzij's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mandzij is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Mandzij
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. Roman W. Mandzij billed Medicare for 1,378 services in 2024
CMS data shows 1,378 Medicare services from Dr. Mandzij across 12 procedure codes in 2024, for 212 Medicare patients. Medicare paid $83,546 for them. Every service was in an office.
Dr. Mandzij's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5902024: 5971%
- Surgery
- 2023: 2692024: 30112%
- Other services
- 2023: 1722024: 28465%
- Tests and treatments
- 2023: 1852024: 1755%
- Lab and pathology
- 2023: 02024: 21
Dr. Mandzij compared with the Illinois median for internists, 2024
- Dr. Mandzij
- Illinois median
- Medicare services
- 1,378vs 5662.4 times
- Medicare patients
- 212vs 208Close to median
- Part D claims
- 2,171vs 2847.6 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Mandzij'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. Mandzij and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roman W. Mandzij treated 212 Medicare patients in 2024, average age 76
CMS counts 212 Medicare patients who saw Dr. Mandzij in 2024. The largest group is 65 to 74, with 96 patients. 61% of them have high blood pressure, and 50% have high cholesterol. Their average risk score is 0.85, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mandzij's median patient age at 63, with 43% women.
Dr. Mandzij's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mandzij's Medicare patients by sex, 2024
- Women10951%
- Men10349%
Chronic conditions among Dr. Mandzij's Medicare patients, 2024
- High blood pressure61%
- High cholesterol50%
- Arthritis36%
- Anxiety21%
- Ischemic heart disease18%
- Mood disorders17%
- Osteoporosis16%
- Cancer15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mandzij's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roman W. Mandzij wrote 2,617 Medicare Part D claims in 2024
In 2024, Dr. Mandzij wrote 2,617 Medicare Part D claims for 261 patients. 87% of them were for generic drugs. CMS names the drug for 2,171 of them, across 65 drugs with 11 or more claims each, at $257,870 in total drug cost. In 2023, CMS named 1,809 claims across 54 drugs.
Dr. Mandzij's Part D claims by kind of drug, 2024
- Generic2,271 claims87%
- Brand-name331 claims13%
- Other15 claims1%
Dr. Mandzij'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. Mandzij's Part D claims, 2024
- Opioids0%11 of 2,617 claims
- Antibiotics4%95 of 2,617 claims
- Antipsychotics, patients 65 and over0%11 of 2,617 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: 1,8092024: 2,17120%
Drugs named by CMS: 65 in 2024, 54 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. Roman W. Mandzij takes part in Medicare
Dr. Mandzij accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Roman W. Mandzij received $2,782 in industry payments from 2016 to 2024
CMS Open Payments shows 162 general payments to Dr. Mandzij from 29 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 98% of the total. Pfizer Inc. paid the most, $546.
General payments to Dr. Mandzij by program year, 2016 to 2024
General payments to Dr. Mandzij by kind, 2016 to 2024
- Food and beverage$2,73098%
- Education$522%
Companies that paid Dr. Mandzij the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Roman W. Mandzij'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 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 | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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. Roman W. Mandzij
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. Roman W. Mandzij's NPI number?
Dr. Roman W. Mandzij's NPI number is 1841239902. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roman W. Mandzij?
Dr. Roman W. Mandzij is an internist in Northbrook, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Roman W. Mandzij practice?
Dr. Mandzij practices at 2215 Sanders Rd, Northbrook, IL 60062. Dr. Mandzij's primary practice is Winnetka Avenue Physicians, SC in Northbrook, Illinois. Dmand AI also links Dr. Mandzij to 1 hospital, 3 group practices and clinics, 2 home health agencies and 2 medical groups.
What is Dr. Roman W. Mandzij's office phone number?
The practice phone on file for Dr. Mandzij is (847) 501-5060.
What is Dr. Roman W. Mandzij's medical license number?
Dr. Mandzij holds Illinois license 036-096445.
Which hospitals is Dr. Roman W. Mandzij affiliated with?
Dr. Mandzij is affiliated with Evanston Hospital. Dmand AI links Dr. Mandzij to 1 more hospital.
What medical group is Dr. Roman W. Mandzij part of?
Dr. Mandzij is linked to Winnetka Avenue Physicians. Dmand AI links Dr. Mandzij to 2 more medical groups.
Does Dr. Roman W. Mandzij accept Medicare?
Yes. CMS data shows Dr. Mandzij billed Medicare for 1,378 services in 2024, and Dr. Mandzij accepts Medicare assignment.
How many Medicare patients does Dr. Roman W. Mandzij see?
CMS counts 212 Medicare patients who saw Dr. Mandzij in 2024, with an average age of 76.
What services does Dr. Roman W. Mandzij bill to Medicare?
In 2024, Dr. Mandzij's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G2211).
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What drugs does Dr. Roman W. Mandzij prescribe most?
In 2024 Medicare Part D data, Dr. Mandzij's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Lisinopril.
Has Dr. Roman W. Mandzij received payments from drug or device companies?
CMS Open Payments shows $2,782 in general payments to Dr. Mandzij from 29 companies from 2016 to 2024. The largest total came from Pfizer Inc.
How long has Dr. Roman W. Mandzij been practicing?
Dr. Mandzij graduated from medical school in 1994, 32 years ago.
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