In 2012, Dr. Garrett Wayne Knowles, OD had a list price for anterior segment surgery, cataract surgery, cataract surgery with IOL implantation, comprehensive eye exam, extracapsular cataract extraction (ECCE) with IOL implantation, extracapsular lens removal, intraocular lens (IOL) implant, lens removal surgery, lens replacement surgery, and simple cataract surgery that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Oregon. 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. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2012 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	28
eye procedures	36

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2013 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	26
eye procedures	58

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	28
Female	53

**Age**
From 65 to 74	29
From 75 to 84	24
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2013

Hypertension	64
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	20
Depression	16
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	0
Diabetes	36
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2014 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	51
eye procedures	89

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	49
Female	64

**Ethnicity**
Non-Hispanic White	101
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	51
From 75 to 84	28
85 and over	14
Less than 65	20

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2014

Hypertension	46
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	25
Depression	25
Chronic Kidney Disease	13
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	35
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2015 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	74
eye procedures	126

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	122
Female	168

**Age**
From 65 to 74	134
From 75 to 84	86
85 and over	34
Less than 65	36

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2015

Hypertension	50
High Cholesterol	34
Stroke	0
Ischemic Heart Disease	25
Depression	19
Chronic Kidney Disease	19
Asthma	10
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	0
Diabetes	34
Dementia	8
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2016 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	107
eye procedures	153

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	81
Female	89

**Ethnicity**
Non-Hispanic White	154
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	80
From 75 to 84	47
85 and over	21
Less than 65	22

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2016

Hypertension	54
High Cholesterol	38
Stroke	0
Ischemic Heart Disease	25
Depression	15
Chronic Kidney Disease	24
Asthma	14
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	39
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2017 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	81
eye procedures	124

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	79
Female	81

**Ethnicity**
Non-Hispanic White	148
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	67
From 75 to 84	51
85 and over	22
Less than 65	20

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2017

Hypertension	56
High Cholesterol	35
Stroke	0
Ischemic Heart Disease	20
Depression	18
Chronic Kidney Disease	23
Asthma	8
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	31
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2018 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	79
eye procedures	119

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	57
Female	75

**Ethnicity**
Non-Hispanic White	113
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	57
From 75 to 84	42
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2018

Hypertension	58
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	20
Depression	19
Chronic Kidney Disease	27
Asthma	8
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	39
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2019 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	77
eye procedures	129

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	66
Female	95

**Ethnicity**
Non-Hispanic White	133
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	75
From 75 to 84	47
85 and over	12
Less than 65	27

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2019

Hypertension	55
High Cholesterol	37
Stroke	0
Ischemic Heart Disease	20
Depression	19
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	17
Chronic Obstructive Pulmonary Disease	8
Diabetes	34
Dementia	8
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2020 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	77
eye procedures	163

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	92
Female	114

**Ethnicity**
Non-Hispanic White	191
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	108
From 75 to 84	56
85 and over	19
Less than 65	23

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2020

Hypertension	42
High Cholesterol	30
Stroke	0
Ischemic Heart Disease	13
Depression	15
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	5
Atrial Fibrilation	8
Heart Failure	8
Chronic Obstructive Pulmonary Disease	7
Diabetes	24
Dementia	6
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2021 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	115
eye procedures	204

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	105
Female	153

**Ethnicity**
Non-Hispanic White	234
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	78
85 and over	22
Less than 65	23

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2021

Hypertension	47
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	14
Depression	20
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	4
Atrial Fibrilation	5
Heart Failure	10
Chronic Obstructive Pulmonary Disease	5
Diabetes	26
Dementia	6
Cancer	7

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR during 2022 were eye procedures.

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

doctor visit	160
eye procedures	110

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	100
Female	127

**Ethnicity**
Non-Hispanic White	203
Black	0
Hispanic	12
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	112
From 75 to 84	69
85 and over	21
Less than 65	25

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2022

Hypertension	60
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	15
Depression	13
Chronic Kidney Disease	15
Asthma	7
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	30
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Garrett Wayne Knowles, OD for Medicare patients.

The highest averages for the top procedures that Dr. Garrett Wayne Knowles, OD treated as an optometrist in Monmouth, OR were eye procedures.

doctor visit	79
eye procedures	119

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Garrett Wayne Knowles, OD.

**Gender**
Male	70
Female	92

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	116
Native American / Alaskan Native	0
Hispanic	2
Other	0

**Age**
75 to 84	48
85 and over	15
Less than 65	17
65 to 74	77

Average of Total of Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD From 2012 - 2022

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

Hypertension	48
High Cholesterol	34
Stroke	0
Ischemic Heart Disease	17
Depression	16
Chronic Kidney Disease	17
Asthma	4
Osteoporosis	1
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	29
Atrial Fibrillation	4
Dementia	4
Cancer	3

Education & Training

He has a state license in Oregon.

Licensed In: Oregon

Ratings & Reviews

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General Payments

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

**Payments by Company**
ABB Con-Cise Optical Group LLC	$589 Contact Lens $589
Johnson & Johnson Vision Care, Inc.	$521 Acuvue $460	Soft contact lenses $62
Coopervision Inc.	$38 CVI Contact Lens $38
Allergan Inc.	$11 LUMIGAN $11

**Types of Payments**
Food and Beverage	$648
Gift	$500
Education	$11

Biography

Dr. Garrett Knowles practices optometry (primary eye care) in Monmouth, OR. Dr. Knowles obtained a license to practice in Oregon.

Select Year:

Dr. Garrett Wayne Knowles, OD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Garrett Wayne Knowles, OD in 2023

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. Garrett Wayne Knowles, OD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, OD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Garrett Wayne Knowles, 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. Garrett Wayne Knowles, OD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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