Doctor profile · Federal record
Dr. William Mosier, MD
Ophthalmology Physician (CMS: Ophthalmology) · Fullerton, CA
- NPI 1063553378
- Accepts Medicare
- MIPS 100.0 / 100 · 2023
- 43 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
265 Laguna RD
Fullerton, CA 928352515
(714) 871-2570
fax (714) 441-2020
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- April 11, 2014
- Year of graduation
- 1983 — 43 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State license (1)
- California #A41428
- Medicaid
- CA #00A414280
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1063553378. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,175
Distinct HCPCS
10
Medicare allowed
$213,114
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
92014 |
Established patient complete exam of visual system | 672 | 621 | $141 | |
92133 |
Imaging of optic nerve | 412 | 318 | $40 | |
92012 |
Established patient problem focused exam of visual system | 320 | 243 | $100 | |
92250 |
Photography of the retina | 165 | 161 | $42 | |
92083 |
Exam of visual field with extended testing | 163 | 157 | $70 | |
92134 |
Imaging of retina | 138 | 130 | $44 | |
92004 |
New patient complete exam of visual system | 88 | 88 | $167 | |
92136 |
Measurement of corneal curvature and depth of eye | 80 | 37 | $25 | |
66984 |
Removal of cataract with insertion of prosthetic lens | 36 | 26 | $589 | |
92025 |
Ct scan of cornea | 35 | 35 | $41 |
In context: peer comparison
Among 3 peers in Fullerton Ophthalmology Physician, average services per provider: 141. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$917
Transactions
50
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 14 | $383.23 | |
| Sun Pharmaceutical Industries INC. | 24 | $278.44 | |
| Oyster Point Pharma, INC. | 2 | $64.85 | |
| Bausch & Lomb Americas INC. | 3 | $43.65 | |
| RxSight INC | 2 | $40.38 | |
| Alcon Vision LLC | 2 | $34.77 | |
| Dompe US, INC. | 1 | $30.38 | |
| Thea Pharma INC. | 1 | $22.45 | |
| Ani Pharmaceuticals, INC. | 1 | $19.22 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,236
Patients
1,236
Total drug cost
$320,701
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 1,261 | 436 | $36,694 |
| Timolol Maleate | Generic | 519 | 176 | $34,799 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 480 | 134 | $12,555 |
| Prednisolone Acetate | Generic | 171 | 114 | $6,330 |
| Lumigan (Bimatoprost) | Brand | 166 | 56 | $116,013 |
| Brimonidine Tartrate | Generic | 152 | 52 | $7,174 |
| Alphagan P (Brimonidine Tartrate) | Brand | 91 | 37 | $50,440 |
| Gatifloxacin | Generic | 72 | 48 | $5,122 |
| Dorzolamide Hcl | Generic | 65 | 27 | $1,939 |
| Brimonidine Tartrate-Timolol (Brimonidine Tartrate/Timolol) | Brand | 64 | 20 | $18,083 |
Frequently asked questions
What is Dr. William Mosier's medical specialty?
Dr. William Mosier practices Ophthalmology Physician in Fullerton, CA.
Where does Dr. William Mosier practice?
Dr. William Mosier practices at 265 Laguna RD, Fullerton, CA 928352515. Office phone: 7148712570.
What is Dr. William Mosier's NPI?
Dr. William Mosier's National Provider Identifier (NPI) is 1063553378, issued by NPPES.
Does Dr. William Mosier accept Medicare assignment?
Yes. Dr. William Mosier accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Mosier commonly perform?
Top Medicare-reported procedures in 2023: Established patient complete exam of visual system (HCPCS 92014); Imaging of optic nerve (HCPCS 92133); Established patient problem focused exam of visual system (HCPCS 92012). Source: CMS Medicare Physician & Other Practitioners file.