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Home > WA Providers > Family Physicians & Family Medicine Specialists

Dr. Richard Derrick Knowles, MD

Accepting New Patients

(227 Ratings)

Specializes in: Family Medicine

3101 Southeast 192nd Avenue Suite 103
Vancouver, WA 98683

(360) 666-4480

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

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 10%

By Volume:

preventive care

In 2023, Dr. Richard Derrick Knowles, MD performed more preventive care procedures for Medicare patients than 90% of providers in related specialties within Washington.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Richard Derrick Knowles, MD treated as a family medicine practitioner in Vancouver, WA during 2012 were blood draw and lab tests.

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

blood draw	68
doctor visit	276
lab tests	20

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

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

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

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

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

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

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

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

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

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

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

Average Medicare Procedure Volume From 2012 - 2022

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, lab tests, preventive care and vaccines.

abdominal imaging	12
blood draw	135
doctor visit	408
lab tests	38
preventive care	24
thoracic (chest) imaging	20
vaccines	24
X-rays	23

Average Medicare Patient Data From 2012 - 2022

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

**Gender**
Male	120
Female	153

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	11
Non-Hispanic White	241
Native American / Alaskan Native	0
Hispanic	2
Other	1

**Age**
75 to 84	80
85 and over	31
Less than 65	43
65 to 74	117

Average of Total of Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD From 2012 - 2022

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

Hypertension	52
High Cholesterol	38
Stroke	1
Ischemic Heart Disease	19
Depression	16
Chronic Kidney Disease	18
Asthma	7
Osteoporosis	2
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	26
Atrial Fibrillation	9
Dementia	8
Cancer	7

Education & Training

He completed residency at Group Hlth Coop/Puget Sond, Family Medicine. He is certified by the American Board of Family Medicine and has a state license in Oregon.

Residency: Group Hlth Coop/Puget Sond, Family Medicine

Board Certification: American Board of 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

(227 Ratings)

Leave a Review

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' area of specialization is family medicine. The average patient rating for Dr. Knowles is 5.0 stars (out of 5). Dr. Knowles's practice in Vancouver, WA is open to new patients as reported by Doctor.com.

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Dr. Richard Derrick Knowles, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Richard Derrick Knowles, MD in 2023

By Volume:

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. Richard Derrick Knowles, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

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

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

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

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

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

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

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

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

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

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

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

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

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

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

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

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Richard Derrick Knowles, MD 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. Richard Derrick Knowles, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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