Marc Alonzo, MD
NPI 1033142351 · Vascular & Interventional Radiology Physician · Evanston, IL
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Alonzo, MD is a Vascular & Interventional Radiology Physician provider in Evanston, IL (NPI 1033142351).
Provider details
- NPI number
- 1033142351
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
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
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,430 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) |
|---|---|---|
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 198 | $13 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 136 | $15 |
| Fluoroscopic Guidance for Insertion Or Removal of Central Vein Access Device77001 | 121 | $19 |
| Ultrasonic Guidance for Needle Placement76942 | 66 | $31 |
| Aspiration of Fluid From Chest Cavity Using Imaging Guidance32555 | 63 | $121 |
| Ct Scan of Blood Vessels of Abdomen and Pelvis With Contrast74174 | 63 | $108 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,415 across 14 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
- 2006-07-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marc Alonzo's NPI number?
- Marc Alonzo's National Provider Identifier (NPI) is 1033142351, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Alonzo's specialty?
- Marc Alonzo is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Alonzo located?
- Marc Alonzo's practice location on file with NPPES is 2650 Ridge Ave, Evanston, IL 60201-1718.
- What is Marc Alonzo's phone number?
- The practice phone number listed in the NPPES registry for Marc Alonzo is (847) 570-2475.
- Does Marc Alonzo accept Medicare?
- Marc Alonzo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Alonzo's NPI active?
- Yes — Marc Alonzo's NPI (1033142351) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.