Brenda Grzenia
- Medicare services, 2024
- 897
- Medicare patients, 2024
- 167
- Part D claims, 2024
- 289
- Hospital affiliations
- 1
- Industry payments
- $1,799
- Practice address
- 1900 Silver Cross Blvd, New Lenox, IL 60451
- Practice phone
- Call (815) 300-1100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Brenda Grzenia'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.
Brenda Grzenia is a hematologist and oncologist in New Lenox, Illinois
Brenda Grzenia practices at Silver Cross Hospital in New Lenox, Illinois, part of Silver Cross Hospital & Medical Centers.
Brenda Grzenia's NPI, 1376317388, was assigned on November 9, 2023. Brenda Grzenia holds Illinois license 209028719.
- NPI
- 1376317388NPI Registry (opens in a new tab)
- NPI enumeration date
- November 9, 2023
- NPI status
- Active
- Practice phone
- (815) 300-1100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 29
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Brenda Grzenia practices at Silver Cross Hospital in New Lenox, Illinois
Brenda Grzenia's primary practice is Silver Cross Hospital, at 1900 Silver Cross Blvd, New Lenox, IL 60451 in Will County. The practice phone is (815) 300-1100.
- Silver Cross Hospital1900 Silver Cross Blvd, New Lenox, IL 60451 · Will CountyPhone(815) 300-1100
Source: Dmand AI Affiliation Data
Brenda Grzenia is affiliated with 2 sites of care and 1 medical group
Brenda Grzenia's primary practice is Silver Cross Hospital in New Lenox, Illinois, part of Silver Cross Hospital & Medical Centers. The medical group on file is Premier Suburban Medical Group. Dmand AI also links Brenda Grzenia to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Brenda Grzenia's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Brenda Grzenia practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Silver Cross Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Silver Cross Hospital & Medical Centers and 6.2K+ hospitals, with verified contacts in the same login.
Brenda Grzenia is one of 563 hematologists and oncologists in Illinois
Hematology and oncology is Brenda Grzenia's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Brenda Grzenia is licensed in Illinois.
Specialties and state licenses
- Hematology and oncology, IllinoisPrimary
Hematologists and oncologists near Brenda Grzenia
Counts of hematologists and oncologists 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
Brenda Grzenia billed Medicare for 897 services in 2024
CMS data shows 897 Medicare services from Brenda Grzenia across 9 procedure codes in 2024, for 167 Medicare patients. Medicare paid $71,816 for them.
Brenda Grzenia's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 452024: 8241731%
- Lab and pathology
- 2023: 02024: 41
- Other services
- 2023: 02024: 32
Where Brenda Grzenia's Medicare services took place, 2024
- In an office81791%
- In a facility809%
Brenda Grzenia compared with the Illinois median for hematologists and oncologists, 2024
- Brenda Grzenia
- Illinois median
- Medicare services
- 897vs 1,05615% below
- Medicare patients
- 167vs 28241% below
- Part D claims
- 113vs 32866% below
Medians across 547 hematologists and oncologists in Illinois with Dmand AI profiles that report each measure.
Brenda Grzenia'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
Brenda Grzenia treated 167 Medicare patients in 2024, average age 75
CMS counts 167 Medicare patients who saw Brenda Grzenia in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 69% have high cholesterol. 11% are also on Medicaid. Their average risk score is 2.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Brenda Grzenia's median patient age at 68, with 55% women.
Brenda Grzenia's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Brenda Grzenia's Medicare patients by sex, 2024
- Women8752%
- Men8048%
Chronic conditions among Brenda Grzenia's Medicare patients, 2024
- High blood pressure75%
- High cholesterol69%
- Arthritis53%
- Cancer48%
- Chronic kidney disease45%
- Diabetes43%
- Ischemic heart disease39%
- Heart failure36%
Share of Medicare patients with each condition. A patient can have several.
Brenda Grzenia's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women55%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Brenda Grzenia wrote 289 Medicare Part D claims in 2024
In 2024, Brenda Grzenia wrote 289 Medicare Part D claims for 68 patients. 80% of them were for generic drugs. CMS names the drug for 113 of them, across 8 drugs with 11 or more claims each, at $17,248 in total drug cost.
Brenda Grzenia's Part D claims by kind of drug, 2024
- Generic231 claims80%
- Brand-name58 claims20%
Brenda Grzenia'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 Brenda Grzenia's Part D claims, 2024
- Opioids10%30 of 289 claims
- Antibiotics9%26 of 289 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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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Brenda Grzenia received $1,799 in industry payments from 2023 to 2025
CMS Open Payments shows 69 general payments to Brenda Grzenia from 26 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 98% of the total. AstraZeneca Pharmaceuticals LP paid the most, $231.
General payments to Brenda Grzenia by program year, 2023 to 2025
General payments to Brenda Grzenia by kind, 2023 to 2025
- Food and beverage$1,75698%
- Education$432%
Companies that paid Brenda Grzenia the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Brenda Grzenia'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) |
| 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 Brenda Grzenia
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Brenda Grzenia's NPI number?
Brenda Grzenia's NPI number is 1376317388. It was assigned on November 9, 2023, and it is active in the NPI Registry.
What does Brenda Grzenia specialize in?
Brenda Grzenia is a hematologist and oncologist in New Lenox, Illinois. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Brenda Grzenia practice?
Brenda Grzenia practices at 1900 Silver Cross Blvd, New Lenox, IL 60451. Brenda Grzenia's primary practice is Silver Cross Hospital in New Lenox, Illinois, part of Silver Cross Hospital & Medical Centers. Dmand AI also links Brenda Grzenia to 1 group practice or clinic.
What is Brenda Grzenia's office phone number?
The practice phone on file for Brenda Grzenia is (815) 300-1100.
What is Brenda Grzenia's medical license number?
Brenda Grzenia holds Illinois license 209028719.
Which hospitals is Brenda Grzenia affiliated with?
Brenda Grzenia practices at Silver Cross Hospital in New Lenox, Illinois.
What medical group is Brenda Grzenia part of?
Brenda Grzenia is linked to Premier Suburban Medical Group.
Does Brenda Grzenia accept Medicare?
Yes. CMS data shows Brenda Grzenia billed Medicare for 897 services in 2024.
How many Medicare patients does Brenda Grzenia see?
CMS counts 167 Medicare patients who saw Brenda Grzenia in 2024, with an average age of 75.
What services does Brenda Grzenia bill to Medicare?
In 2024, Brenda Grzenia's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and hospital inpatient care (99232).
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What drugs does Brenda Grzenia prescribe most?
In 2024 Medicare Part D data, Brenda Grzenia's most prescribed drugs by claims were Prednisone, Eliquis and Nystatin.
Has Brenda Grzenia received payments from drug or device companies?
CMS Open Payments shows $1,799 in general payments to Brenda Grzenia from 26 companies from 2023 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Brenda Grzenia been practicing?
Brenda Grzenia graduated from medical school in 2023, 3 years ago.
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