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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. William Mosier is Excellent. Dr. Mosier has been reviewed by 15 patients who have provided 5 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.3
Promptness 3.1
Courteous Staff 4.2
Accurate Diagnosis 4.0
Bedside Manner 4.5
Spends Time with Me 3.7
Follows Up After Visit 3.7

Specialties & Research

Dr. William Mosier, MD is board certified in Ophthalmology.

  • He has special expertise in 1 area:
  • Lens Implants (Intraocular Lens Implantation)

Education & Awards

Dr. Mosier graduated from Universidad Nacional Autonoma De Honduras, Tegucigalpa. He has 2 awards.

Patients' Choice Award (2009, 2012, 2014)
Compassionate Doctor Recognition (2014)


Dr. Mosier has 1 hospital affiliations:

  • St. Jude Medical Center 


  • Spanish

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Additional Information
Dr. William David Mosier MD is a male Ophthalmologist, has 29 years of experience and practices in Ophthalmology.
Where does Dr. William D. Mosier practice?
Dr. William Mosier has 3 office locations.
Dr. William Mosier practices Ophthalmology near Fullerton, CA.
Additional practice locations include: Orange, CA.
See Fullerton Ophthalmologists.