Dr. Stephen M. Zaacks, MD
- Medicare services, 2024
- 3,171
- Medicare patients, 2024
- 1,443
- Part D claims, 2024
- 6,632
- MIPS score, 2024
- 85
- Hospital affiliations
- 1
- Practice address
- 800 W Central Road, Arlington Heights, IL 60005
- Practice phone
- Call (847) 618-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zaacks' professional email, personal email and mobile number
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Dr. Stephen M. Zaacks is an interventional cardiologist in Arlington Heights, Illinois
Dr. Zaacks practices at Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health.
Dr. Zaacks' NPI, 1225052327, was assigned on July 26, 2006. Dr. Zaacks graduated from Northwestern University Feinberg Medical School in 1992. Dr. Zaacks holds Illinois license 036088740.
- NPI
- 1225052327NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032144175
- NPI enumeration date
- July 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 618-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen M. Zaacks practices at Northwest Community Hospital in Arlington Heights, Illinois
Dr. Zaacks' primary practice is Northwest Community Hospital, at 800 W Central Road, Arlington Heights, IL 60005 in Cook County. The practice phone is (847) 618-1000.
- Northwest Community Hospital800 W Central Road, Arlington Heights, IL 60005 · Cook CountyPhone(847) 618-1000
Source: Dmand AI Affiliation Data
Dr. Stephen M. Zaacks is affiliated with 4 sites of care and 2 medical groups
Dr. Zaacks' primary practice is Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health. The medical group on file is Endeavor Health Medical Group. Dmand AI also links Dr. Zaacks to 2 more group practices and clinics, 1 hospital outpatient department and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen M. Zaacks' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zaacks practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwest Community Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen M. Zaacks is one of 286 interventional cardiologists in Illinois
Interventional cardiology is Dr. Zaacks' primary specialty in the NPI Registry, under taxonomy code 207RI0011X. Dr. Zaacks is licensed in Illinois.
Specialties and state licenses
- Interventional cardiology, IllinoisPrimary
Interventional cardiologists near Dr. Zaacks
Counts of interventional 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. Stephen M. Zaacks billed Medicare for 3,171 services in 2024
CMS data shows 3,171 Medicare services from Dr. Zaacks across 20 procedure codes in 2024, for 1,443 Medicare patients. Medicare paid $205,644 for them.
Dr. Zaacks' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2,3142024: 1,68527%
- Office and hospital visits
- 2023: 1,5362024: 1,4863%
- Imaging
- 2023: 122024: 0100%
Where Dr. Zaacks' Medicare services took place, 2024
- In an office2,19669%
- In a facility97531%
Dr. Zaacks compared with the Illinois median for interventional cardiologists, 2024
- Dr. Zaacks
- Illinois median
- Medicare services
- 3,171vs 2,26440% above
- Medicare patients
- 1,443vs 96949% above
- Part D claims
- 6,437vs 2,4132.7 times
Medians across 282 interventional cardiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Zaacks' 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. Zaacks and other interventional cardiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen M. Zaacks treated 1,443 Medicare patients in 2024, average age 77
CMS counts 1,443 Medicare patients who saw Dr. Zaacks in 2024. The largest group is 75 to 84, with 591 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.59, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zaacks' median patient age at 67, with 43% women.
Dr. Zaacks' Medicare patients by age, 2024
Dr. Zaacks' Medicare patients by sex, 2024
- Women67347%
- Men77053%
Chronic conditions among Dr. Zaacks' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease62%
- Arthritis55%
- Atrial fibrillation39%
- Diabetes35%
- Chronic kidney disease32%
- Heart failure32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zaacks' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen M. Zaacks wrote 6,632 Medicare Part D claims in 2024
In 2024, Dr. Zaacks wrote 6,632 Medicare Part D claims for 751 patients. 88% of them were for generic drugs. CMS names the drug for 6,437 of them, across 53 drugs with 11 or more claims each, at $1,041,644 in total drug cost. In 2023, CMS named 5,796 claims across 52 drugs.
Dr. Zaacks' Part D claims by kind of drug, 2024
- Generic5,803 claims88%
- Brand-name829 claims13%
Dr. Zaacks' 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: 5,7962024: 6,43711%
Drugs named by CMS: 53 in 2024, 52 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
Dr. Stephen M. Zaacks scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Zaacks for performance year 2024, reported as part of a group. Dr. Zaacks accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 63 procedures of coronary angioplasty and stenting by Dr. Zaacks, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Zaacks' MIPS scores, performance year 2024
- 85of 100Final score
- 75.9of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Zaacks ranks in Medicare procedure volume
- Coronary angioplasty and stenting
- 89th percentile63 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen M. Zaacks received $11,116 in industry payments from 2016 to 2025
CMS Open Payments shows 551 general payments to Dr. Zaacks from 53 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $1,776.
General payments to Dr. Zaacks by program year, 2016 to 2025
Companies that paid Dr. Zaacks the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen M. Zaacks graduated from Northwestern University Feinberg Medical School
Dr. Zaacks graduated from Northwestern University Feinberg Medical School in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen M. Zaacks'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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) |
| 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. Stephen M. Zaacks
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. Stephen M. Zaacks' NPI number?
Dr. Stephen M. Zaacks' NPI number is 1225052327. It was assigned on July 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen M. Zaacks?
Dr. Stephen M. Zaacks is an interventional cardiologist in Arlington Heights, Illinois. The primary specialty in the NPI Registry is Interventional Cardiology Physician (taxonomy code 207RI0011X).
Where does Dr. Stephen M. Zaacks practice?
Dr. Zaacks practices at 800 W Central Road, Arlington Heights, IL 60005. Dr. Zaacks' primary practice is Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health. Dmand AI also links Dr. Zaacks to 2 group practices and clinics, 1 hospital outpatient department and 1 medical group.
What is Dr. Stephen M. Zaacks' office phone number?
The practice phone on file for Dr. Zaacks is (847) 618-1000.
What is Dr. Stephen M. Zaacks' medical license number?
Dr. Zaacks holds Illinois license 036088740.
Which hospitals is Dr. Stephen M. Zaacks affiliated with?
Dr. Zaacks practices at Northwest Community Hospital in Arlington Heights, Illinois.
What medical group is Dr. Stephen M. Zaacks part of?
Dr. Zaacks is linked to Endeavor Health Medical Group. Dmand AI links Dr. Zaacks to 1 more medical group.
Does Dr. Stephen M. Zaacks accept Medicare?
Yes. CMS data shows Dr. Zaacks billed Medicare for 3,171 services in 2024, and Dr. Zaacks accepts Medicare assignment.
What is Dr. Stephen M. Zaacks' MIPS score?
Dr. Zaacks' MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Dr. Stephen M. Zaacks see?
CMS counts 1,443 Medicare patients who saw Dr. Zaacks in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Stephen M. Zaacks bill to Medicare?
In 2024, Dr. Zaacks' most billed Medicare services were office visit, established patient (99214), heart test or procedure (93000) and hospital inpatient care (99232).
Where did Dr. Stephen M. Zaacks go to medical school?
Dr. Zaacks graduated from Northwestern University Feinberg Medical School in 1992.
What drugs does Dr. Stephen M. Zaacks prescribe most?
In 2024 Medicare Part D data, Dr. Zaacks' most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Metoprolol Succinate.
Has Dr. Stephen M. Zaacks received payments from drug or device companies?
CMS Open Payments shows $11,116 in general payments to Dr. Zaacks from 53 companies from 2016 to 2025. The largest total came from Abiomed.
How long has Dr. Stephen M. Zaacks been practicing?
Dr. Zaacks graduated from medical school in 1992, 34 years ago.
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