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Dr. Tonja C. Dirkx, MD

(Dr. Tonja Cross Dirkx, MD)

(No ratings)

Specializes in: Adult Nephrology

University of California, Davis, School of Medicine (1998)

Professional interests include: hypertension (high blood pressure)

3181 Sw Sam Jackson Park Road
Portland, OR 97239

(503) 494-8490

Dr. Tonja C. Dirkx, MD is a nephrologist in Portland, OR specializing in adult nephrology. She graduated from University of California, Davis, School of Medicine in 1998 and has 28 years of experience. Dr. Tonja C. Dirkx, MD is affiliated with U.S. Department of Veterans Affairs and OHSU Healthcare.

Office Locations

3181 Sw Sam Jackson Park Road
Portland, OR 97239

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8495 Crater Lake Highway Va Domiciliary (692)
White City, OR 97503

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2012 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	23
hospital care	150
inpatient care	150

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2013 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	28
hospital care	109
inpatient care	109

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	43
Female	12

**Ethnicity**
Non-Hispanic White	39
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	13
From 75 to 84	11
85 and over	0
Less than 65	31

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	64
Depression	33
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	33
Heart Failure	65
Chronic Obstructive Pulmonary Disease	27
Diabetes	53
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2014 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	60
hospital care	210
inpatient care	210

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	45
Female	35

**Ethnicity**
Non-Hispanic White	65
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	19
From 75 to 84	0
85 and over	0
Less than 65	48

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2014

Hypertension	75
High Cholesterol	56
Stroke	14
Ischemic Heart Disease	50
Depression	44
Chronic Kidney Disease	75
Asthma	15
Osteoperosis	0
Atrial Fibrilation	25
Heart Failure	61
Chronic Obstructive Pulmonary Disease	33
Diabetes	54
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2015 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	37
hospital care	169
inpatient care	169

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	76
Female	52

**Ethnicity**
Non-Hispanic White	98
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	70

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2015

Hypertension	75
High Cholesterol	66
Stroke	0
Ischemic Heart Disease	66
Depression	52
Chronic Kidney Disease	75
Asthma	23
Osteoperosis	0
Atrial Fibrilation	30
Heart Failure	69
Chronic Obstructive Pulmonary Disease	22
Diabetes	59
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2016 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	56
hospital care	202
inpatient care	202

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	40
Female	40

**Ethnicity**
Non-Hispanic White	61
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	41

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2016

Hypertension	75
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	66
Depression	45
Chronic Kidney Disease	75
Asthma	31
Osteoperosis	0
Atrial Fibrilation	19
Heart Failure	53
Chronic Obstructive Pulmonary Disease	29
Diabetes	61
Dementia	28
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2017 were hospital care, inpatient care and dialysis.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

dialysis	24
hospital care	134
inpatient care	134

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	33
Female	27

**Ethnicity**
Non-Hispanic White	45
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	36

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2017

Hypertension	75
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	53
Depression	40
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	18
Heart Failure	57
Chronic Obstructive Pulmonary Disease	18
Diabetes	62
Dementia	18
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

hospital care	230
inpatient care	230

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	50
Female	30

**Ethnicity**
Non-Hispanic White	51
Black	13
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	50

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2018

Hypertension	75
High Cholesterol	59
Stroke	14
Ischemic Heart Disease	56
Depression	44
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	19
Heart Failure	68
Chronic Obstructive Pulmonary Disease	21
Diabetes	60
Dementia	18
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

hospital care	248
inpatient care	248

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	59
Female	38

**Ethnicity**
Non-Hispanic White	70
Black	0
Hispanic	13
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	31
From 75 to 84	0
85 and over	0
Less than 65	49

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	75
Depression	40
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	24
Heart Failure	74
Chronic Obstructive Pulmonary Disease	27
Diabetes	55
Dementia	26
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2020 were hospital care and inpatient care.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

hospital care	145
inpatient care	145

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	36
Female	34

**Ethnicity**
Non-Hispanic White	49
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	24
From 75 to 84	0
85 and over	0
Less than 65	35

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2020

Hypertension	75
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	75
Depression	44
Chronic Kidney Disease	75
Asthma	23
Osteoperosis	0
Atrial Fibrilation	41
Heart Failure	75
Chronic Obstructive Pulmonary Disease	19
Diabetes	73
Dementia	23
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2021 were hospital care and inpatient care.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

hospital care	83
inpatient care	83

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	22
Female	18

**Ethnicity**
Non-Hispanic White	25
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	22

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2021

Hypertension	75
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	75
Depression	48
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	68
Chronic Obstructive Pulmonary Disease	0
Diabetes	65
Dementia	38
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR during 2022 were hospital care and inpatient care.

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

hospital care	31
inpatient care	31

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	19
Female	11

**Age**
From 65 to 74	14
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	60
Depression	40
Chronic Kidney Disease	75
Asthma	0
Osteoperosis	0
Atrial Fibrilation	50
Heart Failure	73
Chronic Obstructive Pulmonary Disease	0
Diabetes	75
Dementia	37
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Tonja C. Dirkx, MD for Medicare patients.

The highest averages for the top procedures that Dr. Tonja C. Dirkx, MD treated as a nephrologist in Portland, OR were hospital care, inpatient care and dialysis.

dialysis	38
hospital care	155
inpatient care	155

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Tonja C. Dirkx, MD.

**Gender**
Male	38
Female	27

**Ethnicity**
Black / African American	1
Asian / Pacific Islander	0
Non-Hispanic White	45
Native American / Alaskan Native	0
Hispanic	1
Other	0

**Age**
75 to 84	1
85 and over	0
Less than 65	34
65 to 74	9

Average of Total of Conditions of Medicare patients treated by Dr. Tonja C. Dirkx, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Tonja C. Dirkx, MD treated were chronic kidney disease, hypertension, heart failure and high cholesterol.

Hypertension	68
High Cholesterol	59
Stroke	2
Ischemic Heart Disease	58
Depression	39
Chronic Kidney Disease	68
Asthma	8
Osteoporosis	0
Heart Failure	60
Chronic Obstructive Pulmonary Disease	17
Diabetes	56
Atrial Fibrillation	23
Dementia	17
Cancer	1

Education & Training

Dr. Tonja C. Dirkx, MD graduated from University of California, Davis, School of Medicine in 1998. She completed residency at Oregon Health & Science University Affiliated Hospitals. She is certified by the Certifications: American Board of Internal Medicine - internal medicine and has a state license in Oregon.

Medical School: University of California, Davis, School of Medicine (1998)

Residency: Oregon Health & Science University Affiliated Hospitals (2001)

Board Certification: Certifications: American Board of Internal Medicine - internal medicine

Licensed In: Oregon

Affiliations & Hospitals

Dr. Tonja C. Dirkx, MD is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs

OHSU Healthcare

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Biography

Dr. Tonja Dirkx's medical specialty is adult nephrology. She has indicated that her clinical interests include hypertension (high blood pressure). Dr. Dirkx's professional affiliations include OHSU Healthcare and U.S. Department of Veterans Affairs. She studied medicine at the University of California, Davis, School of Medicine. She trained at a hospital affiliated with Oregon Health & Science University for her residency.