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Internal Medicine

John Lin, MD

Works at hospitals in Orange, CA · Santa Ana, CA · South el Monte, CA · California

Summary

John Lin, MD (Internal Medicine) is listed by Medicare at 3 hospitals in Orange, CA, Santa Ana, CA and South el Monte, CA. NPI 1689602609. 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 John Lin, 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
35Years since medical school (graduated 1991)
MaleGender (as listed)
Seven Star Hospital Associates IncGroup practice (+1 more)

Quick answers

Which hospitals does John Lin work at?
Medicare's official clinician data lists John Lin at 3 hospitals: Chapman Global Medical Center, Coastal Communities Hospital and Greater El Monte Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does John Lin see patients?
Medicare's clinician data lists 4 practice locations, including Hemet, CA, South El Monte, CA and Orange, CA. Call before your visit to confirm the address.
What is John Lin's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does John Lin accept Medicare assignment?
Yes. Medicare's clinician data says John Lin 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 John Lin?
(951) 652-2811, as listed in official Medicare / NPI Registry data.
What is John Lin's NPI number?
1689602609. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where John Lin works

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

Group practices

Medicare enrollment lists John Lin as a member of these groups (CMS data updated 2026-10-02).

  • Seven Star Hospital Associates Inc126 clinicians in the group
  • Gem Medical Group Corporation57 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Hemet

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

All internal medicine doctors in Hemet →

Clinician information

CredentialMD
Graduation year1991
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1689602609
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