William Chunghun Sim, MD - Medicare Internal Medicine in Downey, CA

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William Chunghun Sim, MD is a medicare enrolled "Internal Medicine" physician in Downey, California. He went to Stanford University School Of Medicine and graduated in 1990 and has 36 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Frischer Medical Group Inc and his current practice location is 11480 Brookshire Ave, 200, Downey, California. You can reach out to his office (for appointments etc.) via phone at (562) 806-0874.

William Chunghun Sim is licensed to practice in California (license number G72353) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1437256906.

Contact Information

William Chunghun Sim, MD
11480 Brookshire Ave, 200,
Downey, CA 90241-9998
(562) 806-0874
(562) 927-4801

Map and Direction




Physician's Profile

Full NameWilliam Chunghun Sim
GenderMale
SpecialityInternal Medicine
Experience36 Years
Location11480 Brookshire Ave, Downey, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William Chunghun Sim attended and graduated from Stanford University School Of Medicine in 1990
  NPI Data:
  • NPI Number: 1437256906
  • Provider Enumeration Date: 09/19/2006
  • Last Update Date: 12/20/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 5698800910
  • Enrollment ID: I20100311000876

Medical Identifiers

Medical identifiers for William Chunghun Sim such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437256906NPI-NPPES
00G723520MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G72353 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Maxlife Home Care Services, IncGlendale, CAHome health agency
Good People Home Health, Inc.Fullerton, CAHome health agency
Ace Home Health, Inc.Los angeles, CAHome health agency
Steward Home Health Agency, Inc.Bellflower, CAHome health agency
Trustful Home Health IncBuena park, CAHome health agency
Artemis Hospice And Palliative CareLos angeles, CAHospice
Eminent Hospice Care, IncN hollywood, CAHospice
Pih Health Downey HospitalDowney, CAHospital
Pih Health Hospital-whittierWhittier, CAHospital
Memorialcare Long Beach Medical CenterLong beach, CAHospital
SouthlandNorwalk, CANursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Frischer Medical Group Inc86280165324

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. William Chunghun Sim allows following entities to bill medicare on his behalf.
Entity NameFrischer Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659328797
PECOS PAC ID: 8628016532
Enrollment ID: O20050421000299

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. William Chunghun Sim 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
William Chunghun Sim, MD
11480 Brookshire Ave, 200,
Downey, CA 90241-9998

Ph: (562) 806-0874		William Chunghun Sim, MD
11480 Brookshire Ave, 200,
Downey, CA 90241-9998

Ph: (562) 806-0874

Reviews and Comments


Internal Medicine Doctors in Downey, CA

Brandon Lui,
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 9333 Imperial Hwy, Downey, CA 90242
Phone: 562-657-9000    
Mr. Nazar Al-bussam, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 11411 Brookshire Ave, Ste 503, Downey, CA 90241
Phone: 562-861-8853    Fax: 562-861-8820
Betzabe M Alday, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 7601 Imperial Hwy, Downey, CA 90242
Phone: 562-803-0124    Fax: 562-803-5569
Dr. Kiran Pandey, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 9333 Imperial Hwy, Downey, Downey, CA 90242
Phone: 877-608-0044    
Sohail Afra, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 9449 Imperial Hwy # C-228, Downey, CA 90242
Phone: 562-657-4958    
Ava Azimi, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 11500 Brookshire Ave, Downey, CA 90241
Phone: 562-904-5000    
Dr. Lisa Kerestedjian, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 9449 Imperial Hwy, Downey, CA 90242
Phone: 800-823-4040    

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.