Mary Ann H Trephan, MD - Medicare Emergency Medicine in Northridge, CA

Mary Ann H Trephan, MD is a medicare enrolled "Emergency Medicine" physician in Northridge, California. She went to Jefferson Medical College Of Thomas Jefferson University and graduated in 1993 and has 31 years of diverse experience with area of expertise as Emergency Medicine. She is a member of the group practice Exer Medical Corporation and her current practice location is 18300 Roscoe Blvd, Northridge, California. You can reach out to her office (for appointments etc.) via phone at (818) 885-8500.

Mary Ann H Trephan is licensed to practice in California (license number G85040) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1891752614.

Contact Information

Mary Ann H Trephan, MD
18300 Roscoe Blvd,
Northridge, CA 91328
(818) 885-8500
Not Available

Map and Direction




Physician's Profile

Full NameMary Ann H Trephan
GenderFemale
SpecialityEmergency Medicine
Experience31 Years
Location18300 Roscoe Blvd, Northridge, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mary Ann H Trephan attended and graduated from Jefferson Medical College Of Thomas Jefferson University in 1993
  NPI Data:
  • NPI Number: 1891752614
  • Provider Enumeration Date: 04/26/2006
  • Last Update Date: 12/01/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0648177501
  • Enrollment ID: I20031217001071

Medical Identifiers

Medical identifiers for Mary Ann H Trephan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1891752614NPI-NPPES
00G850400MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine G85040 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Exer Medical Corporation9032359534248

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mary Ann H Trephan allows following entities to bill medicare on her behalf.
Entity NameProvidence Facey Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1710031588
PECOS PAC ID: 3173436276
Enrollment ID: O20031105000822
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770515280
PECOS PAC ID: 6002729175
Enrollment ID: O20031110000678
Entity NameExer Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1588901532
PECOS PAC ID: 9032359534
Enrollment ID: O20130705000153
Entity NameRidgeline Emergency Physicians Medical Group, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1972953230
PECOS PAC ID: 0345521613
Enrollment ID: O20161228000227

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mary Ann H Trephan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mary Ann H Trephan, MD
Po Box 4675,
Thousand Oaks, CA 91359-1675

Ph: () -
Mary Ann H Trephan, MD
18300 Roscoe Blvd,
Northridge, CA 91328

Ph: (818) 885-8500

Reviews and Comments


Emergency Medicine Doctors in Northridge, CA

Cory Todd Munden, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 18433 Roscoe Blvd, Northridge, CA 91325
Phone: 818-885-7507    
Matthew P Beatty, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 18300 Roscoe Blvd, Northridge, CA 91328
Phone: 818-885-8500    
Steven L Cole, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 18300 Roscoe Blvd, Northridge, CA 91328
Phone: 818-885-8500    
Ivan C Rokos, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 18300 Roscoe Blvd, Northridge, CA 91328
Phone: 818-885-8500    
Boris Viadamir Lubavin, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 8510 Balboa Blvd, Ste 150, Northridge, CA 91325
Phone: 888-988-2800    
Gabriel Henry Campion, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 18300 Roscoe Blvd, Northridge, CA 91325
Phone: 818-885-8500    
Shannon M Mcfarland, PA
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 18300 Roscoe Blvd, Northridge, CA 91328
Phone: 818-885-8500    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.