Michelle Tomassi, MD - Medicare Emergency Medicine in Downey, CA

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Michelle Tomassi, MD is a medicare enrolled "Emergency Medicine" physician in Downey, California. Her current practice location is 9333 Imperial Hwy, Downey, California. You can reach out to her office (for appointments etc.) via phone at (562) 657-7130.

Michelle Tomassi is licensed to practice in California (license number C138956) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1710166749.

Contact Information

Michelle Tomassi, MD
9333 Imperial Hwy,
Downey, CA 90242-2812
(562) 657-7130
Not Available

Map and Direction




Physician's Profile

Full NameMichelle Tomassi
GenderFemale
SpecialityEmergency Medicine
Location9333 Imperial Hwy, Downey, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1710166749
  • Provider Enumeration Date: 10/26/2007
  • Last Update Date: 11/22/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0244312015
  • Enrollment ID: I20160226000107

Medical Identifiers

Medical identifiers for Michelle Tomassi such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1710166749NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 246488 (New York)Secondary
207P00000XEmergency Medicine C138956 (California)Primary

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. Michelle Tomassi allows following entities to bill medicare on her behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770515280
PECOS PAC ID: 6002729175
Enrollment ID: O20031110000678

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. Michelle Tomassi 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
Michelle Tomassi, MD
393 E Walnut St Fl 3,
Pasadena, CA 91188-0001

Ph: (626) 405-5113		Michelle Tomassi, MD
9333 Imperial Hwy,
Downey, CA 90242-2812

Ph: (562) 657-7130

Reviews and Comments


Emergency Medicine Doctors in Downey, CA

Mandaar Gokhale, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 11500 Brookshire Ave, Downey, CA 90241
Phone: 562-904-5000    
Dr. Joseph Daniel Grubic,
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 9333 Imperial Hwy, Downey, CA 90242
Phone: 562-657-7130    
Richard P Guess, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 11500 Brookshire Avenue, Downey, CA 90241
Phone: 562-904-5000    
Dr. Theodore Jeen Sung, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 9333 Imperial Hwy, Downey, CA 90242
Phone: 800-823-4040    
Matin Shah,
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 9333 Imperial Hwy, Downey, CA 90242
Phone: 562-657-7130    
Dr. Bryce Ko, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 11500 Brookshire Ave, Pih Health Downey - Department Of Emergency Medicine, Downey, CA 90241
Phone: 562-904-5000    
Denise S Muschett, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 9449 Imperial Hwy, Emergency Department, Downey, CA 90242
Phone: 562-657-7000    

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.