Physician Profile
Unclaimed ProfileAbout MOSIER
William D Mosier, MD is a healthcare provider in Fullerton, CA specializing in ophthalmology. William trained at University of California, Irvine, California College of Medicine, graduating in 1983. According to Medicare claims data, William cared for 2,283 Medicare patients across 2,749 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (714) 871-2570
- Email not available
Practice Locations
265 LAGUNA RD
Fullerton, CA 92835
Procedures Most Often Billed to Medicare
2,749 services · 2,283 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
40 |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
35 |
| Established patient complete exam of visual system | Treatment | 92014 |
799 |
| Imaging of optic nerve | Treatment | 92133 |
539 |
| Established patient problem focused exam of visual system | Treatment | 92012 |
385 |
| Exam of visual field with extended testing | Treatment | 92083 |
227 |
| Photography of the retina | Treatment | 92250 |
225 |
| Imaging of retina | Treatment | 92134 |
180 |
| New patient complete exam of visual system | Treatment | 92004 |
134 |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
87 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other ophthalmology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 3
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other ophthalmology specialists in Fullerton 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of California, Irvine, California College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1983 at University of California, Irvine, California College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Mosier?
Dr. Mosier is an ophthalmology in Fullerton, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
What is Dr. Mosier's address?
Dr. Mosier is listed at 265 LAGUNA RD, Fullerton, CA 92835. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Mosier?
The number on file is (714) 871-2570. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Mosier's NPI number?
Dr. Mosier's National Provider Identifier is 1063553378. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Mosier train?
Dr. Mosier attended University of California, Irvine, California College of Medicine, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Mosier been practicing?
Dr. Mosier has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Mosier perform?
According to Medicare billing data, Dr. Mosier performs procedures including removal of cataract with insertion of prosthetic lens; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as established patient complete exam of visual system and imaging of optic nerve. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Mosier confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mosier. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.