Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1134878440 Individual Practitioner Male Practitioner

Dr. Mark Joseph Slader , MD

Emergency Medicine • Orange, CA

Professional Overview & Biography Verified Profile Summary

Dr. Mark Slader, MD is a certified Emergency Medicine practicing in Orange, CA. With approximately 4 years of clinical experience since graduating from University Of California, Irvine, California College Of Medicine in 2022, Dr. Slader delivers high-quality medical care to the local community at 101 THE CITY DR S.

Dr. Slader maintains professional affiliations with Avalon Medical Development Corporation, Regents Of The University Of and does not directly accept Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

101 The City Dr S

Orange, CA 928683201

Telephone 7144567890
Associated Practice Facility / Clinic
🏢 The Department Of Psychiatry Facility NPI 1831159003

Medicare Profile & Education

Medical School

University Of California, Irvine, California College Of Medicine

Graduation Year

2022

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Emergency Medicine in Orange, CA

Rising Specialist (<5 Yrs)
Practitioner Clinical Experience
4 Yrs -9.2 yrs vs City Avg
City Avg: 13.2 Yrs
State Avg: 22.9 Yrs
Regional Practice Density
180 Specialists

Practicing in Orange, CA (7995 Statewide)

Telehealth Adoption Rate
0.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Slader (4 Years) 4 Yrs
Orange Specialty Average (13.2 Years) 13.2 Yrs

Medical Specialties & State Licenses

CMS Verified: 2025-06-04
Emergency Medicine Primary Specialty

NUCC Taxonomy Code: 207P00000X

State License CA A188976

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Student in an Organized Health Care Education/Training Program

NUCC Taxonomy Code: 390200000X

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

Hospital & Practice Group Affiliations

Avalon Medical Development Corporation

100 Falls Canyon Rd, Avalon, CA 907042990

Phone: 3105100700

Regents Of The University Of

101 The City Dr S, Orange, CA 928683201

Phone: 7144567004

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Dr. Isabel Clark , MD

Surgery - Trauma Surgery

NPI 1003262510

Doctor of Medicine (M.D.)

Dr. Antonio Halais Frangieh , MD, MPH

Internal Medicine - Interventional Cardiology

NPI 1003558420

Doctor of Medicine (M.D.), Master of Public Health

Douglas Roszell , RN

Registered Nurse - Administrator

NPI 1003788613

Registered Nurse

Dr. Mark Wylam , MD

Internal Medicine - Critical Care Medicine

NPI 1003880865

Doctor of Medicine (M.D.)

Evan Shih

Internal Medicine

NPI 1013440320
Toyen Yoshizuka , PA-C

Physician Assistant

NPI 1013510825

Physician Assistant (Certified)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active March 22, 2022

NPI status registered as active in NPPES database

📍
Updated Practice Location March 22, 2022

Registered at 101 THE CITY DR S, ORANGE, CA 928683201 (Tel: 7144567890)

📍
Updated Business Mailing Address March 22, 2022

Registered at 101 THE CITY DR S, ORANGE, CA 928683201

👤
Provider Name / Credentials Updated March 22, 2022

Recorded as MARK SLADER, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) March 22, 2022

Student in an Organized Health Care Education/Training Program

🟢
Initial NPI Registration & Enumeration March 22, 2022

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1134878440
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 22, 2022
Last Update: June 04, 2025
Sole Proprietor: No

Mailing Address

101 The City Dr S

Orange, CA 928683201

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.