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Internal Medicine

Mark A. Lopez, DO

Works at hospitals in Mesquite, NV · St George, UT · Nevada, Utah

Summary

Mark A. Lopez, DO (Internal Medicine) is listed by Medicare at 2 hospitals in Mesquite, NV and St George, UT. NPI 1619147220. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Mark A. Lopez, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
22Years since medical school (graduated 2004)
MaleGender (as listed)
Clinicians Medical Group LLCGroup practice (+1 more)

Quick answers

Which hospitals does Mark A. Lopez work at?
Medicare's official clinician data lists Mark A. Lopez at 2 hospitals: Mesa View Regional Hospital and St. George Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Mark A. Lopez see patients?
Medicare's clinician data lists 2 practice locations, including Henderson, NV and Las Vegas, NV. Call before your visit to confirm the address.
What is Mark A. Lopez's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Mark A. Lopez accept Medicare assignment?
Yes. Medicare's clinician data says Mark A. Lopez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Mark A. Lopez?
(702) 963-7000, as listed in official Medicare / NPI Registry data.
What is Mark A. Lopez's NPI number?
1619147220. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Mark A. Lopez works

Medicare's Facility Affiliation Data lists Mark A. Lopez at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Mark A. Lopez is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Mark A. Lopez as a member of these groups (CMS data updated 2026-10-02).

  • Clinicians Medical Group LLC5 clinicians in the group
  • Global Medical Excellence PLLC2 clinicians in the group

Specialties

Find other Internal Medicine doctors in Nevada →

Other internal medicine doctors in Henderson

Clinicians with the same Medicare primary specialty in Henderson, NV — not a recommendation.

All internal medicine doctors in Henderson →

Clinician information

CredentialDO
Graduation year2004
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1619147220
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 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians