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Emergency Medicine

Marina Del Rios, MD

Works at hospitals in Chicago, IL · Illinois

Summary

Dr. Marina Del Rios, MD is an emergency medicine doctor at 5841 S Maryland Ave, Chicago, IL 60637. Phone: (888) 824-0200. Accepts Medicare assignment. In 2024, Marina Del Rios had 54 Original Medicare patients and 56 services. NPI 1689615585. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 5841 S Maryland Ave, Chicago, IL 60637 · Directions
  • Phone: (888) 824‑0200
  • Medicare: Accepts Medicare assignment
  • Hospital: The University of Chicago Medical Center
  • Group practice: University of Chicago
  • Medical school: Rutgers, Robert Woood Johnson Medical School · graduated 2002 (24 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Marina Del Rios, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Marina Del Rios accept Medicare assignment?
Yes. Medicare's clinician data says Marina Del Rios 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 Marina Del Rios see?
In 2024, CMS data shows 54 Original Medicare patients and 56 services for Marina Del Rios. This counts Original Medicare only and measures volume, not quality.
What is Marina Del Rios's NPI number?
1689615585. 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 Marina Del Rios, 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 patients54
Services billed to Medicare56
Different services or procedures6
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)37 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%
  • Arthritis50%
  • Chronic kidney disease48%
  • Depression43%
  • Diabetes39%

Hospitals where Marina Del Rios works

Medicare's Facility Affiliation Data lists Marina Del Rios 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.

Practice locations

Addresses where Marina Del Rios is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Marina Del Rios as a member of this group (CMS data updated October 2, 2026).

  • University of Chicago1,712 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Illinois →

Other emergency medicine doctors in Chicago

Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.

All emergency medicine doctors in Chicago →

Other clinicians in University of Chicago

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolRutgers, Robert Woood Johnson Medical School
Graduation year2002 (24 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1689615585
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians