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

Family Practice

Lisa L. Majer, DO

Works at hospitals in Mission Viejo, CA · California

Summary

Dr. Lisa L. Majer, DO is a family doctor at 1950 Sunny Crest Dr, Suite 2900, Fullerton, CA 92835. Phone: (714) 992-5350. Accepts Medicare assignment. In 2024, Lisa L. Majer had 295 Original Medicare patients and 1,074 services. NPI 1003990748. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Family doctor (Medicare lists Family Practice)
  • Address: 1950 Sunny Crest Dr, Suite 2900, Fullerton, CA 92835 · Directions (4 more locations)
  • Phone: (714) 992‑5350
  • Medicare: Accepts Medicare assignment
  • Hospital: Providence Mission Hospital
  • Group practice: Providence Medical Foundation
  • Medical school: graduated 1987 (39 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Lisa L. Majer, 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 Lisa L. Majer accept Medicare assignment?
Yes. Medicare's clinician data says Lisa L. Majer 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 Lisa L. Majer see?
In 2024, CMS data shows 295 Original Medicare patients and 1,074 services for Lisa L. Majer. This counts Original Medicare only and measures volume, not quality.
What is Lisa L. Majer's NPI number?
1003990748. 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 Lisa L. Majer, 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 patients295
Services billed to Medicare1,074
Different services or procedures77
Participating Medicare providerYes
Average age of these patients77

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)255 services
  2. Injection, dexamethasone sodium phosphate, 1 mg (J1100)147 services
  3. Injection, ceftriaxone sodium, per 250 mg (J0696)104 services
  4. Injection of drug or substance under skin or into muscle (96372)62 services
  5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)38 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 cholesterol75%
  • High blood pressure74%
  • Arthritis62%
  • Ischemic heart disease32%
  • Anxiety28%
  • Depression27%

Hospitals where Lisa L. Majer works

Medicare's Facility Affiliation Data lists Lisa L. Majer at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Lisa L. Majer is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Lisa L. Majer as a member of this group (CMS data updated October 2, 2026).

  • Providence Medical Foundation1,466 clinicians in the group

Specialties

Find other Family Practice doctors in California →

Other family doctors in Fullerton

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

All family doctors in Fullerton →

Other clinicians in Providence Medical Foundation

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

Clinician information

CredentialDO
Graduation year1987 (39 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1003990748
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians