Dr. Mary Ann H. Trephan
- Gender: Female
- Experience: 28 years
- Graduated from: Jefferson Medical College Of Thomas Jefferson University
- Graduation year: 1993
- Sole propriator: Yes
- NPI: 1891752614
Dr. Mary Ann H. Trephan MD
Emergency Physician
She is located at 18300 Roscoe Boulevard in Northridge, CA 91328. Can help patients with the following: Frostbite, General Care, Hematoma, Influenza, Phlebitis and Thrombophlebitis, Prescription Refill. Her National Provider Identifier (NPI) number is 1891752614. Appointment can be made via the phone number (818) 885-8500. She is affiliated with 1 practices and 2 hospitals.
Conditions treated
Dr. Mary Ann H. Trephan, being an emergency physician, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Mary Ann H. Trephan.
- Acute Pain
- Altitude Sickness
- Angina
- Brain Aneurysm
- Brain Hemorrhage
- Broken Bone
- Bruises
- Choking
- Common Cold
- Coronavirus
- Costochondritis
- Febrile Seizure
- Fever
- Frostbite
- General Care
- Headache
- Hematoma
- Influenza
- Insect Stings
- Laceration
- Migraine
- Nausea and Vomiting
- Phlebitis and Thrombophlebitis
- Prescription Refill
- Whiplash
Procedures Performed by Dr. Mary Ann H. Trephan
Insurances Accepted by Dr. Mary Ann H. Trephan
- Medicare
Medicare Enrollment
Dr. Mary Ann H. Trephan is enrolled to bill Medicare as a Practitioner - Emergency Medicine .
Bills through: Providence Facey Medical Foundation
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and is not a comment on insurance accepted, quality, outcomes, or board certification.
Studies
JEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated in 1993
Questions & Answers
What conditions does Dr. Mary Ann H. Trephan treat?
Dr. Mary Ann H. Trephan provides treatment for Frostbite, General Care, Hematoma, Influenza, Phlebitis and Thrombophlebitis, Prescription Refill. For the full list see this list.
Has Dr. Mary Ann H. Trephan affiliation with hospitals?
Dr. Mary Ann H. Trephan is affiliated with NORTHRIDGE HOSPITAL MEDICAL CENTER. For the full list of hospitals see this list.
Where can you meet with Dr. Mary Ann H. Trephan?
Dr. Mary Ann H. Trephan's office is located at 18300 Roscoe Boulevard in Northridge, CA 91328.
Does Dr. Mary Ann H. Trephan have affiliation with practices?
Dr. Mary Ann H. Trephan is affiliated with Loew Vision Rehabilitation Institute.
Does Dr. Mary Ann H. Trephan accept patients with Medicare?
Yes, Dr. Mary Ann H. Trephan accepts patients with Medicare.