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Internal Medicine

Linda J. Lazar, DO

Sees patients in Riverside, CA · Roseville, CA · California

Summary

Dr. Linda J. Lazar, DO is an internal medicine doctor at 10800 Magnolia Ave, Riverside, CA 92505. Phone: (951) 353-2000. Accepts Medicare assignment. In 2024, Linda J. Lazar had 47 Original Medicare patients and 95 services. NPI 1184999559. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 10800 Magnolia Ave, Riverside, CA 92505 · Directions (2 more locations)
  • Phone: (951) 353‑2000
  • Medicare: Accepts Medicare assignment
  • Group practice: Southern California Permanente Medical Group (+2 more)
  • Medical school: Philadelphia College Of Osteopathic Medicine · graduated 2012 (14 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Linda J. Lazar, 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 Linda J. Lazar accept Medicare assignment?
Yes. Medicare's clinician data says Linda J. Lazar 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 Linda J. Lazar see?
In 2024, CMS data shows 47 Original Medicare patients and 95 services for Linda J. Lazar. This counts Original Medicare only and measures volume, not quality.
What is Linda J. Lazar's NPI number?
1184999559. 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 Linda J. Lazar, 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 patients47
Services billed to Medicare95
Different services or procedures5
Participating Medicare providerYes
Average age of these patients65

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)46 services
  2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)28 services
  3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)18 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 blood pressure75%
  • Arthritis75%
  • High cholesterol66%
  • Anxiety36%
  • COPD36%
  • Asthma32%

Practice locations

Addresses where Linda J. Lazar is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Linda J. Lazar as a member of these groups (CMS data updated October 2, 2026).

  • Southern California Permanente Medical Group11,293 clinicians in the group
  • Telemedicine Group PC100 clinicians in the group
  • Arthritis Medical Clinic4 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Riverside

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

All internal medicine doctors in Riverside →

Other clinicians in Southern California Permanente Medical Group

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

Clinician information

CredentialDO
Medical schoolPhiladelphia College Of Osteopathic Medicine
Graduation year2012 (14 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1184999559
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 October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  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