Stephen Yoon, MD - Medicare Internal Medicine in Fullerton, CA

Stephen Yoon, MD is a medicare enrolled "Internal Medicine" physician in Fullerton, California. He went to Rutgers New Jersey Medical School and graduated in 1998 and has 26 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Providence Medical Foundation and his current practice location is 101 E Valencia Mesa Dr, Fullerton, California. You can reach out to his office (for appointments etc.) via phone at (714) 992-3000.

Stephen Yoon is licensed to practice in California (license number A71645) 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 1851327100.

Contact Information

Stephen Yoon, MD
101 E Valencia Mesa Dr,
Fullerton, CA 92835-3809
(714) 992-3000
Not Available

Map and Direction




Physician's Profile

Full NameStephen Yoon
GenderMale
SpecialityInternal Medicine
Experience26 Years
Location101 E Valencia Mesa Dr, Fullerton, 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:
  • Stephen Yoon attended and graduated from Rutgers New Jersey Medical School in 1998
  NPI Data:
  • NPI Number: 1851327100
  • Provider Enumeration Date: 06/25/2006
  • Last Update Date: 05/13/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 3971690942
  • Enrollment ID: I20071107000806

Medical Identifiers

Medical identifiers for Stephen Yoon such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1851327100NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A71645 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Jude Medical CenterFullerton, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Providence Medical Foundation89219932051312

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. Stephen Yoon allows following entities to bill medicare on his behalf.
Entity NameProvidence Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285890624
PECOS PAC ID: 8921993205
Enrollment ID: O20040216001346

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. Stephen Yoon 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
Stephen Yoon, MD
101 E Valencia Mesa Dr,
Fullerton, CA 92835-3809

Ph: (714) 992-3000
Stephen Yoon, MD
101 E Valencia Mesa Dr,
Fullerton, CA 92835-3809

Ph: (714) 992-3000

Reviews and Comments


Internal Medicine Doctors in Fullerton, CA

Kiho Woo, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 101 E. Valencia Dr., Fullerton, CA 92835
Phone: 714-449-4800    Fax: 714-578-8629
Kumkum Sarkar Patel, M.D., MPH
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1837 Sunny Crest Dr, Fullerton, CA 92835
Phone: 714-446-5831    
Pius J. Kim, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 101 E Valencia Mesa Dr, Fullerton, CA 92835
Phone: 714-447-5027    
Steven Woong Kim, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2151 N Harbor Blvd Ste 3200, Fullerton, CA 92835
Phone: 714-446-5900    Fax: 714-446-5800
Yung Lyou, M.D., PH.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2151 N Harbor Blvd Ste 3200, Fullerton, CA 92835
Phone: 714-446-5900    
Eugene Boston,
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 2720 N Harbor Blvd, Suite 100, Fullerton, CA 92835
Phone: 714-449-6990    
Saadah Alrajab, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2501 E Chapman Ave Ste 225, Fullerton, CA 92831
Phone: 714-481-0172    Fax: 562-445-4140

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.