Dr Alex Hieu Ly, MD - Medicare Internal Medicine in Fullerton, CA

Dr Alex Hieu Ly, MD is a medicare enrolled "Internal Medicine" physician in Fullerton, California. He graduated from medical school in 2008 and has 16 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.

Dr Alex Hieu Ly is licensed to practice in California (license number A120555) 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 1134380173.

Contact Information

Dr Alex Hieu Ly, MD
101 E Valencia Mesa Dr,
Fullerton, CA 92835-3809
(714) 992-3000
Not Available

Map and Direction




Physician's Profile

Full NameDr Alex Hieu Ly
GenderMale
SpecialityInternal Medicine
Experience16 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:
  • Dr Alex Hieu Ly graduated from medical school in 2008
  NPI Data:
  • NPI Number: 1134380173
  • Provider Enumeration Date: 06/23/2008
  • Last Update Date: 06/10/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8527228790
  • Enrollment ID: I20140422001860

Medical Identifiers

Medical identifiers for Dr Alex Hieu Ly such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1134380173NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 266249 (New York)Secondary
207R00000XInternal Medicine MD18844 (Maine)Secondary
207R00000XInternal Medicine A120555 (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. Dr Alex Hieu Ly 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
Entity NameHospitalist Medicine Physicians Of California Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184663965
PECOS PAC ID: 8426062027
Enrollment ID: O20060202000956
Entity NameCity Of Hope Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871886366
PECOS PAC ID: 3779751656
Enrollment ID: O20110720000244

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. Dr Alex Hieu Ly 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
Dr Alex Hieu Ly, MD
101 E Valencia Mesa Dr,
Fullerton, CA 92835-3809

Ph: (714) 992-3000
Dr Alex Hieu Ly, 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.