Quick answers
- Does Carlos A. Marin accept Medicare assignment?
- Yes. Medicare's clinician data says Carlos A. Marin accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Carlos A. Marin see?
- In 2024, CMS data shows 58 Original Medicare patients and 86 services for Carlos A. Marin. This counts Original Medicare only and measures volume, not quality.
- What is Carlos A. Marin's NPI number?
- 1194257204. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Carlos A. Marin, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 58 |
|---|---|
| Services billed to Medicare | 86 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Critical care, first 30-74 minutes (99291)33 services
- Insertion of artery tube for blood sampling or infusion through skin (36620)12 services
- Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis67%
- Heart failure53%
- Ischemic heart disease52%
- Chronic kidney disease45%
Hospitals where Carlos A. Marin works
Medicare's Facility Affiliation Data lists Carlos A. Marin at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- MacNeal HospitalBerwyn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140054
Practice locations
Addresses where Carlos A. Marin is enrolled with Medicare (CMS data updated October 2, 2026).
- 2160 S 1st AveMaywood, IL 60153 (708) 216‑8372
- 3249 Oak Park AveBerwyn, IL 60402 (708) 783‑0700
Group practices
Medicare enrollment lists Carlos A. Marin as a member of these groups (CMS data updated October 2, 2026).
- Loyola University Medical Center953 clinicians in the group
- Loyola Medical Group LLC127 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Maywood
Clinicians with the same Medicare primary specialty in Maywood, IL — not a recommendation.
Other clinicians in Loyola University Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194257204 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians