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Dr. Richard Derrick Knowles, MD

Accepting New Patients
Specializes in: Family Medicine
3101 Southeast 192nd Avenue Suite 103
Vancouver, WA 98683

Dr. Richard Derrick Knowles, MD is a family medicine practitioner in Vancouver, WA specializing in family medicine.

View Doctor's Full Profile (360) 666-4480

Office Locations

3101 Southeast 192nd Avenue Suite 103
Vancouver, WA 98683
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Noteworthy Medicare Patient Procedures Performed by Dr. Richard Derrick Knowles, MD in 2023

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

Top 5%

By Volume:

mental health screening

In 2023, Dr. Richard Derrick Knowles, MD performed more mental health screening procedures for Medicare patients than 95% of providers in related specialties within Washington.

Top 25%

By Affordability:

mental health screening

In 2013, Dr. Richard Derrick Knowles, MD had a list price for mental health screening that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Washington. 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

2013 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2013 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 40
doctor visit 141
preventive care 13
vaccines 13

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 55
Female 65
Ethnicity
Non-Hispanic White 106
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 49
From 75 to 84 32
85 and over 20
Less than 65 19

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2013

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2013 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 59
High Cholesterol 56
Stroke 0
Ischemic Heart Disease 22
Depression 17
Chronic Kidney Disease 15
Asthma 0
Osteoperosis 0
Atrial Fibrilation 10
Heart Failure 11
Chronic Obstructive Pulmonary Disease 0
Diabetes 34
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2014 were blood draw, lab tests, preventive care and vaccines.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 215
breathing treatment 12
doctor visit 503
lab tests 69
preventive care 30
thoracic (chest) imaging 20
vaccines 30
X-rays 20

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 146
Female 188
Ethnicity
Non-Hispanic White 294
Black 0
Hispanic 0
Asian 17
Other 0
Native American 0
Age
From 65 to 74 132
From 75 to 84 94
85 and over 39
Less than 65 69

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2014

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2014 were hypertension, high cholesterol, diabetes and depression.

Hypertension 56
High Cholesterol 44
Stroke 4
Ischemic Heart Disease 21
Depression 21
Chronic Kidney Disease 16
Asthma 8
Osteoperosis 4
Atrial Fibrilation 9
Heart Failure 13
Chronic Obstructive Pulmonary Disease 8
Diabetes 31
Dementia 10
Cancer 8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2015 were blood draw, lab tests, X-rays and breathing treatment.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

abdominal imaging 12
blood draw 200
breathing treatment 25
doctor visit 557
lab tests 54
preventive care 21
thoracic (chest) imaging 23
vaccines 21
X-rays 35

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 328
Female 408
Ethnicity
Non-Hispanic White 654
Black 0
Hispanic 0
Asian 38
Other 0
Native American 0
Age
From 65 to 74 346
From 75 to 84 186
85 and over 84
Less than 65 120

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2015

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2015 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 53
High Cholesterol 44
Stroke 0
Ischemic Heart Disease 19
Depression 17
Chronic Kidney Disease 16
Asthma 11
Osteoperosis 0
Atrial Fibrilation 10
Heart Failure 12
Chronic Obstructive Pulmonary Disease 11
Diabetes 32
Dementia 10
Cancer 7

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2016 were blood draw, lab tests, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 193
breathing treatment 14
doctor visit 562
lab tests 76
preventive care 19
thoracic (chest) imaging 23
vaccines 19
X-rays 23

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 160
Female 192
Ethnicity
Non-Hispanic White 306
Black 0
Hispanic 11
Asian 20
Other 0
Native American 0
Age
From 65 to 74 150
From 75 to 84 101
85 and over 38
Less than 65 63

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2016

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2016 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 53
High Cholesterol 37
Stroke 0
Ischemic Heart Disease 19
Depression 14
Chronic Kidney Disease 18
Asthma 14
Osteoperosis 0
Atrial Fibrilation 7
Heart Failure 11
Chronic Obstructive Pulmonary Disease 12
Diabetes 30
Dementia 10
Cancer 6

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2017 were blood draw, lab tests, X-rays and preventive care.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 164
breathing treatment 15
doctor visit 491
lab tests 37
preventive care 16
thoracic (chest) imaging 16
vaccines 16
X-rays 16

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 141
Female 172
Ethnicity
Non-Hispanic White 266
Black 0
Hispanic 11
Asian 25
Other 0
Native American 0
Age
From 65 to 74 127
From 75 to 84 104
85 and over 39
Less than 65 43

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2017

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2017 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 55
High Cholesterol 42
Stroke 0
Ischemic Heart Disease 21
Depression 16
Chronic Kidney Disease 24
Asthma 9
Osteoperosis 0
Atrial Fibrilation 9
Heart Failure 14
Chronic Obstructive Pulmonary Disease 12
Diabetes 34
Dementia 12
Cancer 6

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2018 were blood draw, lab tests and breathing treatment.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 134
breathing treatment 21
doctor visit 421
lab tests 45

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 126
Female 144
Ethnicity
Non-Hispanic White 235
Black 0
Hispanic 0
Asian 14
Other 0
Native American 0
Age
From 65 to 74 108
From 75 to 84 90
85 and over 34
Less than 65 38

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2018

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2018 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 57
High Cholesterol 42
Stroke 0
Ischemic Heart Disease 22
Depression 18
Chronic Kidney Disease 26
Asthma 9
Osteoperosis 4
Atrial Fibrilation 10
Heart Failure 17
Chronic Obstructive Pulmonary Disease 13
Diabetes 34
Dementia 13
Cancer 10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2019 were blood draw and lab tests.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 97
doctor visit 305
lab tests 26

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 100
Female 117
Ethnicity
Non-Hispanic White 189
Black 0
Hispanic 0
Asian 11
Other 0
Native American 0
Age
From 65 to 74 85
From 75 to 84 71
85 and over 34
Less than 65 27

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2019

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2019 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension 59
High Cholesterol 39
Stroke 0
Ischemic Heart Disease 28
Depression 16
Chronic Kidney Disease 26
Asthma 9
Osteoperosis 6
Atrial Fibrilation 12
Heart Failure 16
Chronic Obstructive Pulmonary Disease 16
Diabetes 26
Dementia 12
Cancer 11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2020 were blood draw, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 142
doctor visit 435
lab tests 14
preventive care 47
vaccines 47

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 95
Female 148
Ethnicity
Non-Hispanic White 215
Black 0
Hispanic 0
Asian 0
Other 11
Native American 0
Age
From 65 to 74 109
From 75 to 84 75
85 and over 20
Less than 65 39

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2020

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2020 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 56
High Cholesterol 37
Stroke 0
Ischemic Heart Disease 22
Depression 23
Chronic Kidney Disease 23
Asthma 9
Osteoperosis 5
Atrial Fibrilation 12
Heart Failure 18
Chronic Obstructive Pulmonary Disease 13
Diabetes 26
Dementia 10
Cancer 9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2021 were blood draw, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 175
doctor visit 404
lab tests 21
preventive care 26
vaccines 26

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 88
Female 150
Ethnicity
Non-Hispanic White 213
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 107
From 75 to 84 75
85 and over 20
Less than 65 36

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2021

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2021 were hypertension, high cholesterol, depression and diabetes.

Hypertension 53
High Cholesterol 34
Stroke 0
Ischemic Heart Disease 20
Depression 23
Chronic Kidney Disease 21
Asthma 7
Osteoperosis 6
Atrial Fibrilation 8
Heart Failure 14
Chronic Obstructive Pulmonary Disease 12
Diabetes 23
Dementia 7
Cancer 9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2022 were blood draw and lab tests.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 61
doctor visit 403
lab tests 18

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 90
Female 106
Ethnicity
Non-Hispanic White 174
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 83
From 75 to 84 62
85 and over 22
Less than 65 29

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2022

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2022 were hypertension, high cholesterol, diabetes and depression.

Hypertension 72
High Cholesterol 49
Stroke 10
Ischemic Heart Disease 15
Depression 19
Chronic Kidney Disease 16
Asthma 11
Osteoperosis 7
Atrial Fibrilation 14
Heart Failure 14
Chronic Obstructive Pulmonary Disease 18
Diabetes 25
Dementia 9
Cancer 13

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2023 were preventive care, blood draw and lab tests.

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

blood draw 46
doctor visit 471
lab tests 18
preventive care 255

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 101
Female 111
Ethnicity
Non-Hispanic White 194
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 89
From 75 to 84 69
85 and over 25
Less than 65 29

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD in 2023

The most common conditions of Medicare patients that Dr. Richard Derrick Knowles, MD treated during 2023 were hypertension, high cholesterol, diabetes and depression.

Hypertension 67
High Cholesterol 48
Stroke 7
Ischemic Heart Disease 16
Depression 20
Chronic Kidney Disease 19
Asthma 8
Osteoperosis 0
Atrial Fibrilation 15
Heart Failure 16
Chronic Obstructive Pulmonary Disease 14
Diabetes 25
Dementia 11
Cancer 14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Richard Derrick Knowles, MD for Medicare patients.

The highest averages for the top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA were blood draw, preventive care, lab tests and vaccines.

abdominal imaging 12
blood draw 133
doctor visit 426
lab tests 37
preventive care 53
thoracic (chest) imaging 20
vaccines 24
X-rays 23

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Richard Derrick Knowles, MD.

Gender
Male 130
Female 163
Ethnicity
Black / African American 0
Asian / Pacific Islander 11
Non-Hispanic White 258
Hispanic 2
Native American / Alaskan Native 0
Other 1
Age
75 to 84 87
85 and over 34
Less than 65 46
65 to 74 125

Average of Total of Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD From 2013 - 2023

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

Hypertension 58
High Cholesterol 42
Stroke 1
Ischemic Heart Disease 20
Depression 18
Chronic Kidney Disease 20
Asthma 8
Osteoporosis 2
Heart Failure 14
Chronic Obstructive Pulmonary Disease 11
Diabetes 29
Atrial Fibrillation 10
Dementia 9
Cancer 8

Education & Training

He completed residency at Group Hlth Coop/Puget Sond, Family Medicine. He has a state license in Oregon.

Residency: Group Hlth Coop/Puget Sond, Family Medicine

Licensed In: Oregon

Ratings & Reviews

Dr. Richard Derrick Knowles, MD has an exceptional overall rating with an average of 4.98 out of 5 stars based on 227 ratings. We collect ratings and reviews of Dr. Richard Derrick Knowles, MD from all over the web to help you find the right in Vancouver, WA. 

4.98
Overall Rating
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Reviews From Around The Web
Overall Rating: 5.0 2024-05-20
Patient verified via Press Ganey
Dr. Knowles is an excellent doctor as he is kind, listens very thoughtfully and is so very encouraging. When I see Dr. Knowles I always know that whatever I'm worried about will be taken care of . Dr. Knowles always includes me in whatever plan of action is decided upon and listens to my concerns with genuine interest and questions. Dr. Knowles is always helping me through taking care of my diabetes and never makes me feel bad when I lose a bit of control -helping me regain control and turn it around. Everyone in the office is just wonderful and I couldn't ask for better healthcare. Thank you all very much.
Overall Rating: 5.0 2023-04-22
Patient verified via Press Ganey
Dr. Knowles is patient with us. He understands the nature of our health problems. We sure like him and the staff. It goes without saying that we miss the clinic in battleground and even tho the likely hood of the clinic returning is unlikely we that are still hanging in there hope for its return to battleground some day. Mean time we will drive to where Dr Knowles is. As elderly patients having a doctor familiar with you I feel is important
Overall Rating: 5.0 2025-09-14
Patient verified via Press Ganey
Dr Knowles is well informed about my health issues and gives me answers that I fully understand. I heard that he will be leaving soon and if I could I would definitely follow him however I will be moving in the next couple of months back to Klamath Falls. He is an excellent Dr that listens carefully and gives me an answer that I can understand. I would definitely recommend any friends or family to see him
Overall Rating: 5.0 2024-09-14
Patient verified via Press Ganey
I was concerned that I had contracted COVID. I got my appointment with Dr. Knowles the same morning I called, and he ordered the tests that showed I had indeed contracted COVID. Paxlovid was prescribed and I believe I am on the mend. I am grateful to Dr. Knowles, his staff who went out their way to get me in right away, and others at Providence who make me glad I am under their care. Thanks.
Overall Rating: 5.0 2025-04-12
Patient verified via Press Ganey
This provider knew my chart and records and was the most helpful in explaining my recent tests. He was caring and insightful and took time to answer questions for me. I initially thought that I wanted a female doctor, but he was so compassionate that I felt at ease discussing everything. I am so happy with this doctor. The desk staff is kind and welcoming. I'm glad I found them.
Overall Rating: 5.0 2024-12-01
Patient verified via Press Ganey
Dr, Knowles is an excellent physician. He immediately diagnosed my medical issues and explained causes and available treatments. Dr. Knowles is very knowledgeable, professional and a very pleasant person. I would definitely recommend Dr. Knowles to friends and family. The from desk personnel are outstanding as well. The entire team makes visiting the doctor's office a pleasure.
Overall Rating: 5.0 2024-11-07
Patient verified via Press Ganey
I appreciate Dr. Knowles so much. I have been dealing with chronic issues for basically my whole life and for the first time for as long as I can remember, I am out of pain and feel healthy. He always takes my concerns very seriously and is very knowledgeable and answers any questions that I might have. I plan to stick with Dr. Knowles no matter what practice he goes to.
Overall Rating: 5.0 2025-05-27
Patient verified via Press Ganey
Dr. Knowles was great. He was very friendly and asked many questions about my health and upcoming surgery. He even had my pre-op needs taken care of at the time of my appointment to save me a trip for another appointment. The whole team at Providence Medical Center Gresham was great. It's not often that I say that a trip to the Doctor was a good experience but it was.
Overall Rating: 5.0 2023-06-29
Patient verified via Press Ganey
This Provider and he's staff treated me with respect, and we went thru my medications list to make sure it was up to date. I didn't fell rushed during this appointment. Spent ample time with this provider discussing all my concerns and issues. I felt safe. I truly like this provider. He listens and acts fast. He is very knowledgeable. He is a kind person.
Overall Rating: 5.0 2024-06-11
Patient verified via Press Ganey
The front desk personnel were very professional and friendly. They made it a pleasure to visit the office and provided a pleasant experience. Doctor Knowles is an outstanding doctor who has assisted me in maintaining good health. He has a very pleasant demeanor and listens to my health concerns and takes appropriate, positive actions.

To see all 227 reviews for Dr. Richard Derrick Knowles, MD, view their full profile.

General Payments

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

Payments by Company
ViiV Healthcare Company $484 TRIUMEQ
$174 		TIVICAY
$168 		JULUCA
$64
$78
AstraZeneca Pharmaceuticals LP $347 FARXIGA
$210 		SYMBICORT
$103 		DUTOPROL
$21
$13
Janssen Products, LP $320 PREZISTA
$200 		PREZCOBIX
$100 		INTELENCE
$20
E.R. Squibb & Sons, L.L.C. $160 ELIQUIS
$101 		SUSTIVA
$48
$12
Gilead Sciences Inc $158 Harvoni
$20
$138
Other $1,185 Trintellix
$116 		VIBERZI
$82 		LANTUS
$59 		COMPLERA
$55 		Mavyret
$47 		Other
$826
Types of Payments
Food and Beverage $2,271
Education $322
Consulting Fee $60

Biography

Dr. Richard Knowles' specialty is family medicine. These areas are among Dr. Knowles's clinical interests: alcohol abuse, depression, and runner's knee (patellofemoral syndrome). Patients rated him highly, giving him an average of 5.0 stars (out of 5). He seems to honor several insurance carriers, including Regence, Blue California, and United Healthcare POS. He is a graduate of American University of the Caribbean School of Medicine. Dr. Knowles is professionally affiliated with Providence. Doctor.com reports that he is accepting new patients at his office in Vancouver, WA.

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