Stephen Zaacks, M.D.
NPI 1225052327 · Cardiovascular Disease Physician · Arlington Heights, IL
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Zaacks, M.D. is a Cardiovascular Disease Physician provider in Arlington Heights, IL (NPI 1225052327).
Provider details
- NPI number
- 1225052327
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036088740 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,171 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 895 | $135 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 814 | $15 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 362 | $83 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 261 | $8 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 211 | $12 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 722 | 209 |
| Rosuvastatin Calcium | 500 | 142 |
| Metoprolol Succinate | 486 | 135 |
| Apixabanbrand: Eliquis | 461 | 111 |
| Metoprolol Tartrate | 398 | 115 |
| Amlodipine Besylate | 388 | 111 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,231 across 40 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2025-09-16
- Certified
- 2025-09-16
Frequently asked questions
- What is Stephen Zaacks's NPI number?
- Stephen Zaacks's National Provider Identifier (NPI) is 1225052327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Zaacks's specialty?
- Stephen Zaacks is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Zaacks located?
- Stephen Zaacks's practice location on file with NPPES is 1632 W Central Rd, Arlington Heights, IL 60005-2407.
- What is Stephen Zaacks's phone number?
- The practice phone number listed in the NPPES registry for Stephen Zaacks is (847) 618-2500.
- Does Stephen Zaacks accept Medicare?
- Stephen Zaacks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Zaacks's NPI active?
- Yes — Stephen Zaacks's NPI (1225052327) is active in the NPPES registry as of the last update on 2025-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.