Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Infectious Disease

Leonidez De Guzman, MD

Works at hospitals in Portland, OR · Gresham, OR · Oregon

Summary

Leonidez De Guzman, MD (Infectious Disease) is listed by Medicare at 3 hospitals in Portland, OR and Gresham, OR. NPI 1699900340. 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 Leonidez De Guzman, 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

Infectious DiseasePrimary specialty
YesAccepts Medicare assignment
24Years since medical school (graduated 2002)
MaleGender (as listed)
Kaiser Foundation Health Plan of the NorthwestGroup practice (+1 more)

Quick answers

Which hospitals does Leonidez De Guzman work at?
Medicare's official clinician data lists Leonidez De Guzman at 3 hospitals: Legacy Emanuel Medical Center, Legacy Good Samaritan Medical Center and Legacy Mount Hood Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Leonidez De Guzman see patients?
Medicare's clinician data lists 3 practice locations, including Clackamas, OR, Portland, OR and Vancouver, WA. Call before your visit to confirm the address.
What is Leonidez De Guzman's specialty?
Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
Does Leonidez De Guzman accept Medicare assignment?
Yes. Medicare's clinician data says Leonidez De Guzman 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 Leonidez De Guzman?
(800) 813-2000, as listed in official Medicare / NPI Registry data.
What is Leonidez De Guzman's NPI number?
1699900340. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Leonidez De Guzman works

Medicare's Facility Affiliation Data lists Leonidez De Guzman 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 Leonidez De Guzman is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Leonidez De Guzman as a member of these groups (CMS data updated 2026-10-02).

  • Kaiser Foundation Health Plan of the Northwest1,807 clinicians in the group
  • Legacy Clinics LLC713 clinicians in the group

Specialties

Find other Infectious Disease doctors in Oregon →

Other infectious disease doctors in Clackamas

Clinicians with the same Medicare primary specialty in Clackamas, OR — not a recommendation.

All infectious disease doctors in Clackamas →

Clinician information

CredentialMD
Graduation year2002
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1699900340
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