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Dr. Dirk Ross Diefendorf, MD

Accepting New Patients

(11 Ratings)

Specializes in: Osteopathic Manipulative Medicine, Sports Medicine and Orthopedics/Orthopedic Surgery

Northwestern University, Feinberg School of Medicine (1983)

101 South San Mateo Drive Suite 212
San Mateo, CA 94401

(650) 347-0517

Dr. Dirk Ross Diefendorf, MD is an osteopath in San Mateo, CA specializing in osteopathic manipulative medicine, sports medicine and orthopedics/orthopedic surgery. He graduated from Northwestern University, Feinberg School of Medicine in 1983 and has 42 years of experience. Dr. Dirk Ross Diefendorf, MD is affiliated with Sutter Health and Mills-Peninsula Medical Group (MPMG).

Office Locations

Address:

101 S Ellsworth Avenue Suite 607
San Mateo, CA 94401

Address:

101 South San Mateo Drive Suite 212
San Mateo, CA 94401

doctor visit	409
hip imaging	56
musculoskeletal imaging	56
pelvic imaging	31
X-rays	86

**Gender**
Male	90
Female	157

**Ethnicity**
Non-Hispanic White	211
Black	0
Hispanic	0
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	109
From 75 to 84	85
85 and over	0
Less than 65	0

Hypertension	65
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	27
Depression	17
Chronic Kidney Disease	19
Asthma	10
Osteoperosis	15
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	23
Dementia	11
Cancer	11

doctor visit	515
emergency care	28
hip imaging	57
joint surgery	10
lower extremity surgery	10
minimally invasive procedures	10
musculoskeletal imaging	57
pelvic imaging	31
reconstructive surgery	10
spinal procedures	10
X-rays	98

**Gender**
Male	120
Female	164

**Ethnicity**
Non-Hispanic White	233
Black	0
Hispanic	22
Asian	18
Other	0
Native American	0

**Age**
From 65 to 74	124
From 75 to 84	91
85 and over	58
Less than 65	11

Hypertension	67
High Cholesterol	59
Stroke	5
Ischemic Heart Disease	30
Depression	17
Chronic Kidney Disease	26
Asthma	6
Osteoperosis	13
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Dementia	9
Cancer	13

aspiration	15
doctor visit	520
emergency care	25
hip imaging	46
hospital care	33
injections	15
inpatient care	33
joint surgery	11
lower extremity surgery	11
minimally invasive procedures	11
musculoskeletal imaging	46
pelvic imaging	40
reconstructive surgery	11
X-rays	85

**Gender**
Male	220
Female	376

**Ethnicity**
Non-Hispanic White	492
Black	0
Hispanic	36
Asian	42
Other	0
Native American	0

**Age**
From 65 to 74	262
From 75 to 84	194
85 and over	0
Less than 65	0

Hypertension	67
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	26
Depression	19
Chronic Kidney Disease	25
Asthma	9
Osteoperosis	20
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	22
Dementia	8
Cancer	14

doctor visit	513
hospital care	63
immobilization	13
inpatient care	63
pelvic imaging	12
X-rays	10

**Gender**
Male	104
Female	211

**Ethnicity**
Non-Hispanic White	270
Black	0
Hispanic	0
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	138
From 75 to 84	97
85 and over	0
Less than 65	0

Hypertension	67
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	21
Depression	20
Chronic Kidney Disease	26
Asthma	14
Osteoperosis	18
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	24
Dementia	12
Cancer	14

doctor visit	478
emergency care	19
hospital care	39
inpatient care	39

**Gender**
Male	101
Female	171

**Ethnicity**
Non-Hispanic White	221
Black	0
Hispanic	13
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	129
From 75 to 84	92
85 and over	0
Less than 65	0

Hypertension	63
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	23
Depression	16
Chronic Kidney Disease	28
Asthma	8
Osteoperosis	21
Atrial Fibrilation	9
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	26
Dementia	12
Cancer	11

**Gender**
Male	113
Female	185

**Ethnicity**
Non-Hispanic White	237
Black	0
Hispanic	17
Asian	30
Other	0
Native American	0

**Age**
From 65 to 74	133
From 75 to 84	100
85 and over	0
Less than 65	0

Hypertension	63
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	19
Depression	18
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	12
Chronic Obstructive Pulmonary Disease	4
Diabetes	24
Dementia	11
Cancer	13

aspiration	11
doctor visit	578
hospital care	38
injections	11
inpatient care	38

**Gender**
Male	124
Female	180

**Ethnicity**
Non-Hispanic White	253
Black	0
Hispanic	0
Asian	26
Other	12
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	92
85 and over	0
Less than 65	0

Hypertension	64
High Cholesterol	59
Stroke	6
Ischemic Heart Disease	20
Depression	19
Chronic Kidney Disease	28
Asthma	7
Osteoperosis	15
Atrial Fibrilation	9
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	22
Dementia	10
Cancer	13

doctor visit	384
hospital care	18
inpatient care	18

**Gender**
Male	84
Female	130

**Ethnicity**
Non-Hispanic White	174
Black	0
Hispanic	0
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	102
From 75 to 84	62
85 and over	0
Less than 65	0

Hypertension	55
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	23
Depression	17
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	17
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	6
Diabetes	19
Dementia	9
Cancer	11

doctor visit	938
hospital care	31
inpatient care	31

Average Medicare Procedure Volume From 2013 - 2021

Volume of procedures performed by Dr. Dirk Ross Diefendorf, MD for Medicare patients.

The highest averages for the top procedures that Dr. Dirk Ross Diefendorf, MD treated as an osteopath in San Mateo, CA were X-rays, musculoskeletal imaging, hip imaging and inpatient care.

aspiration	12
doctor visit	544
emergency care	24
hip imaging	53
hospital care	35
immobilization	13
injections	12
inpatient care	35
joint surgery	10
lower extremity surgery	10
minimally invasive procedures	10
musculoskeletal imaging	53
pelvic imaging	28
reconstructive surgery	10
spinal procedures	10
X-rays	70

Average Medicare Patient Data From 2013 - 2021

Information about Medicare patients treated by Dr. Dirk Ross Diefendorf, MD.

**Gender**
Male	95
Female	157

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	20
Non-Hispanic White	209
Native American / Alaskan Native	0
Hispanic	8
Other	1

**Age**
85 and over	5
75 to 84	81
Less than 65	1
65 to 74	113

Average of Total of Conditions of Medicare patients treated by Dr. Dirk Ross Diefendorf, MD From 2013 - 2021

The highest averages of the most common conditions of Medicare patients that Dr. Dirk Ross Diefendorf, MD treated were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	51
High Cholesterol	45
Stroke	2
Ischemic Heart Disease	18
Depression	14
Chronic Kidney Disease	19
Asthma	6
Osteoporosis	13
Heart Failure	10
Chronic Obstructive Pulmonary Disease	6
Diabetes	18
Atrial Fibrillation	9
Dementia	8
Cancer	10

Education & Training

Dr. Dirk Ross Diefendorf, MD graduated from Northwestern University, Feinberg School of Medicine in 1983. He completed residency at University of Southern California (USC) Affiliated Hospitals. He is certified by the Orthopedic Surgery and has a state license in California.

Medical School: Northwestern University, Feinberg School of Medicine (1983)

Residency: University of Southern California (USC) Affiliated Hospitals

Board Certification: Orthopedic Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Dirk Ross Diefendorf, MD is associated with these hospitals and organizations:

Sutter Health

Mills-Peninsula Medical Group (MPMG)

Ratings & Reviews

Dr. Dirk Ross Diefendorf, MD has a high overall rating with an average of 4.36 out of 5 stars based on 11 ratings. We collect ratings and reviews of Dr. Dirk Ross Diefendorf, MD from all over the web to help you find the right in San Mateo, CA.

4.36

Overall Rating

(11 Ratings)

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General Payments

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

**Payments by Company**
Zimmer Biomet Holdings, Inc.	$254 Persona $127	Persona MC $127
Stryker Corporation	$193 Mako $150	TRAUMA & EXTREMITIES $42
Medtronic Xomed, Inc.	$37 Advanced Energy Hemostatis Device $37
Tornier, Inc.	$28 DEV - Ascend Flex $14	$14
Tenex Health Inc.	$12 $12
Other	$11 Joint Fluid Therapy $11

**Types of Payments**
Food and Beverage	$535

Biography

Dr. Dirk Diefendorf is a specialist in osteopathic manipulative medicine, orthopedics/orthopedic surgery, and sports medicine. He works in San Mateo, CA. Patients rated Dr. Diefendorf highly, giving him an average of 4.0 stars (out of 5). He is affiliated with Mills-Peninsula Medical Center and Mills-Peninsula Medical Group (MPMG). He has an open panel in San Mateo, CA according to Sutter Health. He studied medicine at Northwestern University, Feinberg School of Medicine. Dr. Diefendorf's training includes a residency program at a hospital affiliated with the University of Southern California (USC). In addition to English, he speaks Spanish.