Doctor profile · Federal record
Dr. William Shaffer, O.D.
Optometrist (CMS: Optometry) · Oxnard, CA
- NPI 1457451031
- Accepts Medicare
- 53 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
340 S 5Th St
Oxnard, CA 930307043
(805) 487-6363
fax (805) 486-9698
Credentials & registration
- NPI registered
- September 2006 — 20 yrs on file
- Profile last updated
- May 14, 2008
- Year of graduation
- 1973 — 53 yrs since
- Specialty taxonomy
- 152W00000X — NUCC code
- State license (1)
- California #5774T
- Medicaid
- CA #SD0057742
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1457451031. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
422
Distinct HCPCS
6
Medicare allowed
$23,463
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
92201 |
Extended exam of the back part of the eye with retinal drawing | 114 | 111 | $26 | |
92083 |
Exam of visual field with extended testing | 84 | 80 | $59 | |
92133 |
Imaging of optic nerve | 71 | 69 | $38 | |
92014 |
Established patient complete exam of visual system | 69 | 67 | $84 | |
92004 |
New patient complete exam of visual system | 55 | 55 | $84 | |
92012 |
Established patient problem focused exam of visual system | 29 | 17 | $84 |
In context: peer comparison
Among 3 peers in Oxnard Optometrist, average services per provider: 100. This provider delivers 4.2× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
109
Patients
19
Total drug cost
$29,425
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Lumigan (Bimatoprost) | Brand | 64 | 19 | $28,290 |
| Latanoprost | Generic | 34 | 0 | $575 |
| Moxifloxacin (Moxifloxacin Hcl) | Brand | 11 | 0 | $559 |
Frequently asked questions
What is Dr. William Shaffer's medical specialty?
Dr. William Shaffer practices Optometrist in Oxnard, CA.
Where does Dr. William Shaffer practice?
Dr. William Shaffer practices at 340 S 5Th St, Oxnard, CA 930307043. Office phone: 8054876363.
What is Dr. William Shaffer's NPI?
Dr. William Shaffer's National Provider Identifier (NPI) is 1457451031, issued by NPPES.
Does Dr. William Shaffer accept Medicare assignment?
Yes. Dr. William Shaffer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Shaffer commonly perform?
Top Medicare-reported procedures in 2023: Extended exam of the back part of the eye with retinal drawing (HCPCS 92201); Exam of visual field with extended testing (HCPCS 92083); Imaging of optic nerve (HCPCS 92133). Source: CMS Medicare Physician & Other Practitioners file.