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Internal Medicine

Maria Hernandez, MD

Works at hospitals in Dubuque, IA · Galena, IL · Iowa, Illinois

Summary

Dr. Maria Hernandez, MD is an internal medicine doctor at 1000 Langworthy St, Dubuque, IA 52001. Phone: (563) 584-4100. Accepts Medicare assignment. In 2024, Maria Hernandez had 145 Original Medicare patients and 1,649 services. NPI 1588721419. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1000 Langworthy St, Dubuque, IA 52001 · Directions (2 more locations)
  • Phone: (563) 584‑4100
  • Medicare: Accepts Medicare assignment
  • Hospitals: MercyOne Dubuque Medical Center, Midwest Medical Center
  • Group practice: Medical Associates Clinic P C
  • Medical school: University Of Illinois College Of Med (chi/peor/rock/chm-Urb) · graduated 2001 (25 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Maria Hernandez, 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 Maria Hernandez accept Medicare assignment?
Yes. Medicare's clinician data says Maria Hernandez 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 Maria Hernandez see?
In 2024, CMS data shows 145 Original Medicare patients and 1,649 services for Maria Hernandez. This counts Original Medicare only and measures volume, not quality.
What is Maria Hernandez's NPI number?
1588721419. 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 Maria Hernandez, 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 patients145
Services billed to Medicare1,649
Different services or procedures85
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)209 services
  2. Insertion of needle into vein for collection of blood sample (36415)75 services
  3. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)48 services
  4. Blood test, comprehensive group of blood chemicals (80053)47 services
  5. Blood test, thyroid stimulating hormone (tsh) (84443)43 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 cholesterol75%
  • High blood pressure59%
  • Arthritis37%
  • Anxiety21%
  • Diabetes19%
  • Ischemic heart disease19%

Hospitals where Maria Hernandez works

Medicare's Facility Affiliation Data lists Maria Hernandez 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 Maria Hernandez is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Maria Hernandez as a member of this group (CMS data updated October 2, 2026).

  • Medical Associates Clinic P C233 clinicians in the group

Specialties

Find other Internal Medicine doctors in Iowa →

Other internal medicine doctors in Dubuque

Clinicians with the same Medicare primary specialty in Dubuque, IA — not a recommendation.

All internal medicine doctors in Dubuque →

Other clinicians in Medical Associates Clinic P C

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

Clinician information

CredentialMD
Medical schoolUniversity Of Illinois College Of Med (chi/peor/rock/chm-Urb)
Graduation year2001 (25 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1588721419
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