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

Preventive Medicine

Ryan Holas, MD

Sees patients in Loma Linda, CA · California

Summary

Ryan Holas, MD (Preventive Medicine) is enrolled with Medicare at 2 practice locations in Loma Linda, CA. NPI 1598333502. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Ryan Holas, 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

Preventive MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
5Years since medical school (graduated 2021)
Loma Linda University School Of MedicineMedical school
MaleGender (as listed)
Faculty Physicians and Surgeons of LlusmGroup practice

Quick answers

Where does Ryan Holas see patients?
Medicare's clinician data lists 2 practice locations, including Loma Linda, CA. Call before your visit to confirm the address.
What is Ryan Holas's specialty?
Medicare lists Preventive Medicine as the primary specialty.
Does Ryan Holas accept Medicare assignment?
Yes. Medicare's clinician data says Ryan Holas 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.
Does Ryan Holas offer telehealth?
Medicare's clinician data says Ryan Holas offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Ryan Holas?
(909) 558-4000, as listed in official Medicare / NPI Registry data.
What is Ryan Holas's NPI number?
1598333502. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Ryan Holas is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Ryan Holas as a member of this group (CMS data updated 2026-10-02).

  • Faculty Physicians and Surgeons of Llusm1,315 clinicians in the group

Specialties

Find other Preventive Medicine doctors in California →

Other preventive medicine doctors in Loma Linda

Clinicians with the same Medicare primary specialty in Loma Linda, CA — not a recommendation.

All preventive medicine doctors in Loma Linda →

Clinician information

CredentialMD
Medical schoolLoma Linda University School Of Medicine
Graduation year2021
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1598333502
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians