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Home > CA Providers > Optometrists

Dr. John Rader Prewett, OD

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Specializes in: Optometry (Primary Eye Care)

1429 S Broadway
Santa Maria, CA 93454

(805) 925-9575

Dr. John Rader Prewett, OD is an optometrist in Santa Maria, CA specializing in optometry (primary eye care).

Office Locations

1429 S Broadway
Santa Maria, CA 93454

(805) 925-9575

(805) 739-8886

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Noteworthy Medicare Patient Procedures Performed by Dr. John Rader Prewett, OD in 2023

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

Top 10%

By Affordability:

gonioscopy

In 2023, Dr. John Rader Prewett, OD had a list price for gonioscopy that was lower than the list prices billed to Medicare by 90% 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:

comprehensive eye exam

eye procedures

SCODI of the posterior segment

By Affordability:

comprehensive eye exam

eye exam

eye tests

visual field test

In 2012, among providers in related specialties within California, Dr. John Rader Prewett, OD performed more comprehensive eye exam, eye procedures, and SCODI of the posterior segment (SCODI-P) procedures for Medicare patients than 75% of them and he also had a list price for comprehensive eye exam, eye exam, eye tests, and visual field test that was lower than the list prices billed to Medicare by 75% of them. 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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2012 were eye procedures and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	425
eye procedures	668
lacrimal (tearing system) procedures	77

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2013 were eye procedures and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	427
eye procedures	505
lacrimal (tearing system) procedures	59

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	114
Female	169

**Ethnicity**
Non-Hispanic White	123
Black	0
Hispanic	144
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	123
From 75 to 84	65
85 and over	21
Less than 65	74

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2013

Hypertension	67
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	19
Depression	17
Chronic Kidney Disease	19
Asthma	7
Osteoperosis	9
Atrial Fibrilation	5
Heart Failure	19
Chronic Obstructive Pulmonary Disease	13
Diabetes	40
Dementia	7
Cancer	6

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2014 were eye procedures and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	518
eye procedures	614
lacrimal (tearing system) procedures	60

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	117
Female	197

**Ethnicity**
Non-Hispanic White	132
Black	0
Hispanic	161
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	87
85 and over	31
Less than 65	86

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2014

Hypertension	69
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	16
Depression	19
Chronic Kidney Disease	18
Asthma	6
Osteoperosis	5
Atrial Fibrilation	6
Heart Failure	14
Chronic Obstructive Pulmonary Disease	15
Diabetes	37
Dementia	6
Cancer	6

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2015 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	552
eye procedures	564

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	314
Female	404

**Ethnicity**
Non-Hispanic White	260
Black	0
Hispanic	408
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	308
From 75 to 84	162
85 and over	42
Less than 65	206

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2015

Hypertension	67
High Cholesterol	51
Stroke	4
Ischemic Heart Disease	19
Depression	19
Chronic Kidney Disease	16
Asthma	8
Osteoperosis	6
Atrial Fibrilation	5
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	42
Dementia	6
Cancer	6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2016 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	605
eye procedures	523

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	178
Female	203

**Ethnicity**
Non-Hispanic White	131
Black	0
Hispanic	226
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	150
From 75 to 84	97
85 and over	24
Less than 65	110

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2016

Hypertension	68
High Cholesterol	49
Stroke	5
Ischemic Heart Disease	19
Depression	19
Chronic Kidney Disease	23
Asthma	16
Osteoperosis	9
Atrial Fibrilation	5
Heart Failure	11
Chronic Obstructive Pulmonary Disease	14
Diabetes	45
Dementia	7
Cancer	6

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2017 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	638
eye procedures	559

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	154
Female	225

**Ethnicity**
Non-Hispanic White	127
Black	0
Hispanic	220
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	143
From 75 to 84	91
85 and over	29
Less than 65	116

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2017

Hypertension	72
High Cholesterol	49
Stroke	4
Ischemic Heart Disease	21
Depression	23
Chronic Kidney Disease	28
Asthma	7
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	10
Chronic Obstructive Pulmonary Disease	13
Diabetes	45
Dementia	7
Cancer	4

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2018 were eye procedures and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	707
eye procedures	700
lacrimal (tearing system) procedures	26

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	154
Female	222

**Ethnicity**
Non-Hispanic White	131
Black	0
Hispanic	223
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	159
From 75 to 84	90
85 and over	24
Less than 65	103

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2018

Hypertension	69
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	17
Depression	23
Chronic Kidney Disease	29
Asthma	5
Osteoperosis	9
Atrial Fibrilation	5
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	42
Dementia	6
Cancer	5

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2019 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	608
eye procedures	651

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	155
Female	211

**Ethnicity**
Non-Hispanic White	126
Black	0
Hispanic	214
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	169
From 75 to 84	65
85 and over	25
Less than 65	107

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2019

Hypertension	67
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	16
Depression	21
Chronic Kidney Disease	27
Asthma	4
Osteoperosis	9
Atrial Fibrilation	5
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	43
Dementia	5
Cancer	5

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2020 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	509
eye procedures	421

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	122
Female	192

**Ethnicity**
Non-Hispanic White	100
Black	0
Hispanic	196
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	156
From 75 to 84	71
85 and over	15
Less than 65	72

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2020

Hypertension	67
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	17
Depression	25
Chronic Kidney Disease	25
Asthma	6
Osteoperosis	14
Atrial Fibrilation	4
Heart Failure	12
Chronic Obstructive Pulmonary Disease	7
Diabetes	40
Dementia	5
Cancer	5

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2021 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	793
eye procedures	578

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	147
Female	242

**Ethnicity**
Non-Hispanic White	130
Black	0
Hispanic	235
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	191
From 75 to 84	91
85 and over	19
Less than 65	88

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2021

Hypertension	71
High Cholesterol	58
Stroke	3
Ischemic Heart Disease	19
Depression	21
Chronic Kidney Disease	26
Asthma	5
Osteoperosis	11
Atrial Fibrilation	4
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	42
Dementia	7
Cancer	5

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA during 2022 were eye procedures.

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

doctor visit	838
eye procedures	564

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	150
Female	256

**Ethnicity**
Non-Hispanic White	125
Black	0
Hispanic	257
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	187
From 75 to 84	96
85 and over	27
Less than 65	96

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2022

Hypertension	75
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	12
Depression	22
Chronic Kidney Disease	15
Asthma	8
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	8
Chronic Obstructive Pulmonary Disease	12
Diabetes	43
Dementia	4
Cancer	6

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John Rader Prewett, OD for Medicare patients.

The highest averages for the top procedures that Dr. John Rader Prewett, OD treated as an optometrist in Santa Maria, CA were eye procedures and lacrimal (tearing system) procedures.

doctor visit	601
eye procedures	577
lacrimal (tearing system) procedures	55

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John Rader Prewett, OD.

**Gender**
Male	145
Female	211

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	125
Native American / Alaskan Native	0
Hispanic	207
Other	0

**Age**
75 to 84	83
85 and over	23
Less than 65	96
65 to 74	154

Average of Total of Conditions of Medicare patients treated by Dr. John Rader Prewett, OD From 2012 - 2022

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

Hypertension	62
High Cholesterol	48
Stroke	3
Ischemic Heart Disease	15
Depression	19
Chronic Kidney Disease	20
Asthma	6
Osteoporosis	8
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	38
Atrial Fibrillation	4
Dementia	5
Cancer	4

Education & Training

He has a state license in California.

Licensed In: California

Ratings & Reviews

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General Payments

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

**Payments by Company**
Alcon Laboratories Inc	$346 Contact Lenses $133	$212
Oyster Point Pharma, Inc.	$153 TYRVAYA $153
Bausch & Lomb, a division of Bausch Health US, LLC	$104 VYZULTA $104
Allergan Inc.	$100 RESTASIS $100
Alcon Vision LLC	$39 EYSUVIS $39
Other	$68 XIIDRA $38	Contact Lens $30

**Types of Payments**
Food and Beverage	$773
Education	$38

Biography

Dr. John Prewett practices optometry (primary eye care) in Santa Maria, CA. Dr. Prewett has obtained a license to practice in California.

Select Year:

Dr. John Rader Prewett, OD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. John Rader Prewett, OD in 2023

By Affordability:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Rader Prewett, OD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. John Rader Prewett, OD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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