Dr William D Mosier, MD - Medicare Ophthalmology in Fullerton, CA

Dr William D Mosier, MD is a medicare enrolled "Ophthalmology" physician in Fullerton, California. He went to University Of California, Irvine, California College Of Medicine and graduated in 1983 and has 41 years of diverse experience with area of expertise as Ophthalmology. He is a member of the group practice William D Mosier Md Inc A Professional Medical Corporation and his current practice location is 265 Laguna Rd, Fullerton, California. You can reach out to his office (for appointments etc.) via phone at (714) 871-2570.

Dr William D Mosier is licensed to practice in California (license number A41428) 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 1063553378.

Contact Information

Dr William D Mosier, MD
265 Laguna Rd,
Fullerton, CA 92835-2515
(714) 871-2570
(714) 441-2020

Map and Direction




Physician's Profile

Full NameDr William D Mosier
GenderMale
SpecialityOphthalmology
Experience41 Years
Location265 Laguna Rd, 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 William D Mosier attended and graduated from University Of California, Irvine, California College Of Medicine in 1983
  NPI Data:
  • NPI Number: 1063553378
  • Provider Enumeration Date: 02/09/2007
  • Last Update Date: 04/11/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 9638230790
  • Enrollment ID: I20081208000336

Medical Identifiers

Medical identifiers for Dr William D Mosier such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1063553378NPI-NPPES
00A414280MedicaidCA
P00665890OtherCARAIL ROAD MEDICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology A41428 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Jude Medical CenterFullerton, CAHospital

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 William D Mosier allows following entities to bill medicare on his behalf.
Entity NameWilliam D Mosier Md Inc A Professional Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1003476508
PECOS PAC ID: 2365877958
Enrollment ID: O20200108000962

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 William D Mosier 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 William D Mosier, MD
265 Laguna Rd,
Fullerton, CA 92835-2515

Ph: (714) 871-2570
Dr William D Mosier, MD
265 Laguna Rd,
Fullerton, CA 92835-2515

Ph: (714) 871-2570

Reviews and Comments


Ophthalmology Doctors in Fullerton, CA

Diana Lee, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 2226 N State College Blvd, Fullerton, CA 92831
Phone: 657-286-5375    
Dr. Sean David Adrean, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 301 W Bastanchury Rd, 285, Fullerton, CA 92835
Phone: 714-738-4620    Fax: 714-738-0388
Dr. Hema Laskhmi Ramkumar, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 301 W Bastanchury Rd Ste 285, Fullerton, CA 92835
Phone: 714-738-4620    
Dr. Scott Grant, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 301 W Bastanchury Rd, 285, Fullerton, CA 92835
Phone: 714-738-4620    Fax: 714-738-0388
Dr. Clifford M Terry, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 270 Laguna Rd, Suite 100, Fullerton, CA 92835
Phone: 714-525-2375    Fax: 714-871-9280
Dr. Jeffrey Victor Winston, M.D.
Ophthalmology
Medicare: May Accept Medicare Assignments
Practice Location: 1400 N Harbor Blvd Ste 101, Fullerton, CA 92835
Phone: 714-888-2080    Fax: 714-888-2099

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.