Elizabeth Retzer, M.D.
NPI 1639331655 · Interventional Cardiology Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Retzer, M.D. is a Interventional Cardiology Physician provider in Mchenry, IL (NPI 1639331655).
Provider details
- NPI number
- 1639331655
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036127442 (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
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
8,714 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 3,242 | $8 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 973 | $8 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 788 | $67 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 571 | $16 |
| Heart Muscle Strain Imaging93356 | 557 | $11 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 717 | 252 |
| Metoprolol Succinate | 453 | 157 |
| Carvedilol | 337 | 115 |
| Amlodipine Besylate | 287 | 109 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 262 | 113 |
| Lisinopril | 238 | 89 |
| Furosemide | 236 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$863 across 25 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
Additional practice locations (2)
- 360 Station Dr Fl 3Crystal Lake, IL 60014-7978Phone: (815) 759-8070Fax: (815) 759-4931
- 10370 Haligus Rd Ste 200Huntley, IL 60142-9582Phone: (815) 759-8070Fax: (815) 759-4931
Registry dates
- Enumerated
- 2008-07-01
- Last updated
- 2018-10-19
Frequently asked questions
- What is Elizabeth Retzer's NPI number?
- Elizabeth Retzer's National Provider Identifier (NPI) is 1639331655, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Retzer's specialty?
- Elizabeth Retzer is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Retzer located?
- Elizabeth Retzer's practice location on file with NPPES is 4309 W Medical Center Dr Ste A200, Mchenry, IL 60050.
- What is Elizabeth Retzer's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Retzer is (815) 759-8070.
- Does Elizabeth Retzer accept Medicare?
- Elizabeth Retzer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Retzer's NPI active?
- Yes — Elizabeth Retzer's NPI (1639331655) is active in the NPPES registry as of the last update on 2018-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.