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Home > CA Providers > Optometrists

Dr. William John Shaffer, OD

(5 Ratings)

Specializes in: Optometry (Primary Eye Care)

Southern College of Optometry (1973)

340 S 5th Street
Oxnard, CA 93030

(805) 487-6363

Dr. William John Shaffer, OD is an optometrist in Oxnard, CA specializing in optometry (primary eye care). He graduated from Southern College of Optometry in 1973 and has 52 years of experience.

Office Locations

340 S 5th Street
Oxnard, CA 93030

(805) 487-6363

(805) 486-9698

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Noteworthy Medicare Patient Procedures Performed by Dr. William John Shaffer, OD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 5%

By Affordability:

comprehensive eye exam

eye exam

intermediate eye exam

visual field test

In 2023, Dr. William John Shaffer, OD had a list price for comprehensive eye exam, eye exam, intermediate eye exam, and visual field test that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Volume:

eye procedures

In 2013, Dr. William John Shaffer, OD performed more eye procedures procedures for Medicare patients than 75% of providers in related specialties within California.

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2013 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	609

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	72
Female	111

**Ethnicity**
Non-Hispanic White	37
Black	0
Hispanic	132
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	69
From 75 to 84	49
85 and over	16
Less than 65	49

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2013

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2013 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	69
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	28
Depression	21
Chronic Kidney Disease	22
Asthma	8
Osteoperosis	6
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	46
Dementia	9
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2014 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	478

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	88
Female	103

**Ethnicity**
Non-Hispanic White	33
Black	0
Hispanic	144
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	68
From 75 to 84	57
85 and over	16
Less than 65	50

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2014

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2014 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	73
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	34
Depression	19
Chronic Kidney Disease	24
Asthma	9
Osteoperosis	7
Atrial Fibrilation	0
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	50
Dementia	6
Cancer	6

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2015 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	528

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	142
Female	228

**Ethnicity**
Non-Hispanic White	44
Black	0
Hispanic	288
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	146
From 75 to 84	106
85 and over	28
Less than 65	90

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2015

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2015 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	68
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	32
Depression	21
Chronic Kidney Disease	23
Asthma	11
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	15
Chronic Obstructive Pulmonary Disease	8
Diabetes	52
Dementia	0
Cancer	6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2016 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	567

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	78
Female	135

**Ethnicity**
Non-Hispanic White	37
Black	13
Hispanic	152
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	78
From 75 to 84	52
85 and over	22
Less than 65	61

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2016

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2016 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	69
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	26
Depression	23
Chronic Kidney Disease	31
Asthma	14
Osteoperosis	8
Atrial Fibrilation	8
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	50
Dementia	6
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2017 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	424

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	51
Female	108

**Ethnicity**
Non-Hispanic White	19
Black	0
Hispanic	128
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	68
From 75 to 84	35
85 and over	22
Less than 65	34

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2017

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2017 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	71
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	30
Depression	22
Chronic Kidney Disease	30
Asthma	7
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	13
Diabetes	50
Dementia	9
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2018 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	650

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	66
Female	99

**Ethnicity**
Non-Hispanic White	16
Black	0
Hispanic	131
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	65
From 75 to 84	38
85 and over	20
Less than 65	42

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2018

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2018 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	75
High Cholesterol	58
Stroke	0
Ischemic Heart Disease	27
Depression	18
Chronic Kidney Disease	35
Asthma	10
Osteoperosis	8
Atrial Fibrilation	0
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	54
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2019 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	620

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	54
Female	108

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	122
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	48
85 and over	16
Less than 65	37

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2019

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2019 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	26
Depression	28
Chronic Kidney Disease	33
Asthma	12
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	14
Chronic Obstructive Pulmonary Disease	0
Diabetes	56
Dementia	9
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2020 were eye procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	364
ultrasound (sonogram)	15

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	42
Female	68

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	83
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	29
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2020

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2020 were hypertension, diabetes, high cholesterol and chronic kidney disease.

Hypertension	66
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	22
Depression	22
Chronic Kidney Disease	34
Asthma	11
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	10
Diabetes	59
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2021 were eye procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	337
ultrasound (sonogram)	11

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	34
Female	82

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	95
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	50
From 75 to 84	29
85 and over	14
Less than 65	23

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2021

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2021 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	73
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	28
Depression	26
Chronic Kidney Disease	36
Asthma	13
Osteoperosis	13
Atrial Fibrilation	0
Heart Failure	16
Chronic Obstructive Pulmonary Disease	0
Diabetes	59
Dementia	12
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2022 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	375

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	45
Female	95

**Ethnicity**
Non-Hispanic White	29
Black	0
Hispanic	95
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	65
From 75 to 84	30
85 and over	13
Less than 65	32

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2022

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2022 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	75
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	24
Depression	18
Chronic Kidney Disease	20
Asthma	13
Osteoperosis	21
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	52
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA during 2023 were eye procedures.

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

eye procedures	308

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	43
Female	86

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	97
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	36
85 and over	13
Less than 65	28

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2023

The most common conditions of Medicare patients that Dr. William John Shaffer, OD treated during 2023 were high cholesterol, hypertension, diabetes and ischemic heart disease.

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	22
Depression	21
Chronic Kidney Disease	21
Asthma	12
Osteoperosis	22
Atrial Fibrilation	14
Heart Failure	12
Chronic Obstructive Pulmonary Disease	17
Diabetes	50
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. William John Shaffer, OD for Medicare patients.

The highest averages for the top procedures that Dr. William John Shaffer, OD treated as an optometrist in Oxnard, CA were eye procedures and ultrasound (sonogram).

eye procedures	478
ultrasound (sonogram)	13

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. William John Shaffer, OD.

**Gender**
Male	65
Female	111

**Ethnicity**
Black / African American	1
Asian / Pacific Islander	0
Non-Hispanic White	19
Native American / Alaskan Native	0
Hispanic	133
Other	0

**Age**
75 to 84	46
85 and over	16
Less than 65	40
65 to 74	70

Average of Total of Conditions of Medicare patients treated by Dr. William John Shaffer, OD From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. William John Shaffer, OD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	71
High Cholesterol	61
Stroke	2
Ischemic Heart Disease	27
Depression	21
Chronic Kidney Disease	28
Asthma	10
Osteoporosis	11
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	52
Atrial Fibrillation	6
Cancer	3
Dementia	5

Education & Training

Dr. William John Shaffer, OD graduated from Southern College of Optometry in 1973. He has a state license in California.

Medical School: Southern College of Optometry (1973)

Licensed In: California

Ratings & Reviews

Dr. William John Shaffer, OD has a good overall rating with an average of 3.4 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. William John Shaffer, OD from all over the web to help you find the right in Oxnard, CA.

3.4

Overall Rating

(5 Ratings)

Leave a Review

General Payments

These charts describe general payments received by Dr. William John Shaffer, OD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Allergan Inc.	$116 COMBIGAN $116
Shire North American Group Inc	$38 XIIDRA $38
Carl Zeiss Meditec AG	$34 None Specified $34
Johnson & Johnson Surgical Vision, Inc.	$30 LIPIFLOW SYSTEM ACTIVATOR (DISPOSABLE) $30
MacuLogix, Inc.	$16 AdaptDx $16

**Types of Payments**
Food and Beverage	$162
Education	$38
Gift	$34

Biography

Dr. William Shaffer works as an optometry (primary eye care). Dr. Shaffer has received a 3.5 out of 5 star rating by his patients.

Select Year:

Dr. William John Shaffer, OD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. William John Shaffer, OD in 2023

By Affordability:

By Volume:

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William John Shaffer, OD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Average Medicare Patient Data From 2013 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. William John Shaffer, OD From 2013 - 2023

Education & Training

Ratings & Reviews

General Payments

Biography

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