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Dr. Mark R. Northfield, MD

Accepting New Patients
Specializes in: Sports Medicine and Orthopedics/Orthopedic Surgery
Brown University, Alpert Medical School
Professional interests include: arm fracture, leg fracture, injuries, and more.
1496 Professional Drive Suite 601
Petaluma, CA 94954

Dr. Mark R. Northfield, MD is a sports medicine doctor in Petaluma, CA specializing in sports medicine and orthopedics/orthopedic surgery. He graduated from Brown University, Alpert Medical School. Dr. Mark R. Northfield, MD is affiliated with Providence and Providence Medical Foundation.

View Doctor's Full Profile (707) 778-1131

Office Locations

Providence

1496 Professional Drive Suite 601
Petaluma, CA 94954
(707) 778-1131
open_in_new

Some issues Dr. Mark R. Northfield, MD can help you with:

Musculoskeletal Problems

The musculoskeletal system refers collectively to the bones, joints, ligaments, muscles, and nerves. It is what gives the body structure and movement. Because this system encompasses so much of the body, musculoskeletal problems are extremely varied and can happen almost anywhere. There are musculoskeletal problems that affect only the joints, those that affect the bones, those that affect tendons and ligaments, and those that can happen in any area of the body but cause pain and numbness.

Joint problems include bursitis and arthritis. Bursitis is the inflammation of a fluid-filled sac cushion on the outside of a joint, causing symptoms including pain and swelling. Arthritis is the inflammation and damage of a joint due to wear and tear or disease. There are several treatments for arthritis, but if the damage progresses far enough, joint replacement may be necessary. In joint replacement, a metal or plastic implant is surgically placed within the joint to make movement easier.

Bone problems include scoliosis, fractures, and osteoporosis. Scoliosis is a curvature of the spine, making the normally straight spine look like a 'C' or 'S.' It is treated with braces or surgery. Osteoporosis is a disease that causes bones to weaken and break easily. It's most common in women, especially older women. Fully half of all women over 65 have osteoporosis. Fractures are any break in the bone. They can be a simple crack or a severe and complicated shatter. Osteoporosis causes fractures in people who have it, but other causes are trauma (such as a fall) or overuse.

Tendon and ligament problems most often result from injury or overuse. Two good examples are ligament tears and tendonitis. The most common ligament tear is the ACL tear in the knee. This ligament supports and stabilizes the knee and is most often torn during sports activities. Tendonitis happens when a tendon, which connects muscles and bones together, becomes irritated and inflamed. This happens most often in older patients who push their bodies too far, leading to pain and swelling. Treatment for both tendon and ligament problems usually includes rest, ice, and supporting the area to let it heal.

Pain and numbness problems can be caused by overuse, disease, an injury, or a compressed nerve. Lower back pain and carpal tunnel syndrome are two of the most common conditions patients encounter. Lower back pain may be caused by sore muscles that have been overworked, or an injury to the disks separating the vertebrae in the spine. Lower back pain usually goes away on its own within a few days, but it may require medical treatment depending on the cause. Carpal tunnel syndrome occurs when the nerve at the base of the palm becomes trapped or pinched. Symptoms include tingling, pain, numbness, or weakness in the hand. Treatment involves rest and sometimes steroid injections.

Because the musculoskeletal system involves so much of the body, problems here can be incredibly varied in their type and severity. Some musculoskeletal problems will go away on their own or only require rest, while others may require medication, physical therapy, or even surgery.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2012 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 243
doctor visit 613
hip imaging 40
hospital care 63
injections 243
inpatient care 63
joint surgery 30
lower extremity surgery 30
musculoskeletal imaging 133
reconstructive surgery 30
X-rays 133

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2013 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 210
doctor visit 641
hip imaging 23
hospital care 31
injections 227
inpatient care 31
joint surgery 11
lower extremity surgery 11
musculoskeletal imaging 132
reconstructive surgery 11
spinal procedures 16
X-rays 148

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 130
Female 254
Ethnicity
Non-Hispanic White 338
Black 0
Hispanic 28
Asian 0
Other 0
Native American 0
Age
From 65 to 74 148
From 75 to 84 100
85 and over 72
Less than 65 64

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2013

Hypertension 73
High Cholesterol 56
Stroke 7
Ischemic Heart Disease 32
Depression 26
Chronic Kidney Disease 20
Asthma 8
Osteoperosis 14
Atrial Fibrilation 13
Heart Failure 17
Chronic Obstructive Pulmonary Disease 15
Diabetes 27
Dementia 10
Cancer 7

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2014 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 216
doctor visit 674
hip imaging 48
hospital care 48
injections 253
inpatient care 48
joint surgery 13
lower extremity surgery 13
musculoskeletal imaging 142
reconstructive surgery 13
spinal procedures 20
X-rays 162

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 132
Female 247
Ethnicity
Non-Hispanic White 332
Black 12
Hispanic 22
Asian 0
Other 0
Native American 0
Age
From 65 to 74 155
From 75 to 84 113
85 and over 64
Less than 65 47

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2014

Hypertension 70
High Cholesterol 58
Stroke 4
Ischemic Heart Disease 35
Depression 24
Chronic Kidney Disease 26
Asthma 6
Osteoperosis 13
Atrial Fibrilation 14
Heart Failure 19
Chronic Obstructive Pulmonary Disease 13
Diabetes 31
Dementia 11
Cancer 8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2015 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 281
doctor visit 715
hip imaging 13
hospital care 51
immobilization 14
injections 281
inpatient care 51
joint surgery 18
lower extremity surgery 18
musculoskeletal imaging 160
reconstructive surgery 18
spinal procedures 15
X-rays 175

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 258
Female 504
Ethnicity
Non-Hispanic White 686
Black 0
Hispanic 38
Asian 0
Other 0
Native American 0
Age
From 65 to 74 338
From 75 to 84 218
85 and over 112
Less than 65 94

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2015

Hypertension 65
High Cholesterol 54
Stroke 5
Ischemic Heart Disease 31
Depression 27
Chronic Kidney Disease 20
Asthma 13
Osteoperosis 9
Atrial Fibrilation 16
Heart Failure 18
Chronic Obstructive Pulmonary Disease 15
Diabetes 27
Dementia 10
Cancer 6

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2016 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 249
doctor visit 722
hospital care 44
immobilization 15
injections 283
inpatient care 44
joint surgery 13
lower extremity surgery 13
musculoskeletal imaging 144
pelvic imaging 15
reconstructive surgery 13
spinal procedures 16
X-rays 175

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 168
Female 279
Ethnicity
Non-Hispanic White 402
Black 0
Hispanic 22
Asian 0
Other 0
Native American 0
Age
From 65 to 74 157
From 75 to 84 139
85 and over 95
Less than 65 56

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2016

Hypertension 66
High Cholesterol 55
Stroke 5
Ischemic Heart Disease 36
Depression 23
Chronic Kidney Disease 28
Asthma 21
Osteoperosis 13
Atrial Fibrilation 14
Heart Failure 18
Chronic Obstructive Pulmonary Disease 15
Diabetes 25
Dementia 14
Cancer 11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2017 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 317
doctor visit 780
hospital care 23
injections 343
inpatient care 23
joint surgery 14
lower extremity surgery 14
musculoskeletal imaging 137
pelvic imaging 11
reconstructive surgery 14
spinal procedures 36
X-rays 184

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 138
Female 277
Ethnicity
Non-Hispanic White 375
Black 0
Hispanic 22
Asian 0
Other 0
Native American 0
Age
From 65 to 74 165
From 75 to 84 127
85 and over 84
Less than 65 39

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2017

Hypertension 68
High Cholesterol 56
Stroke 5
Ischemic Heart Disease 36
Depression 25
Chronic Kidney Disease 25
Asthma 11
Osteoperosis 10
Atrial Fibrilation 12
Heart Failure 16
Chronic Obstructive Pulmonary Disease 20
Diabetes 28
Dementia 13
Cancer 9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2018 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 269
doctor visit 755
hospital care 27
injections 269
inpatient care 27
joint surgery 11
lower extremity surgery 11
musculoskeletal imaging 114
pelvic imaging 25
reconstructive surgery 11
spinal procedures 39
X-rays 178

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 142
Female 268
Ethnicity
Non-Hispanic White 364
Black 0
Hispanic 22
Asian 0
Other 12
Native American 0
Age
From 65 to 74 169
From 75 to 84 130
85 and over 77
Less than 65 34

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2018

Hypertension 68
High Cholesterol 59
Stroke 6
Ischemic Heart Disease 37
Depression 26
Chronic Kidney Disease 27
Asthma 10
Osteoperosis 12
Atrial Fibrilation 16
Heart Failure 20
Chronic Obstructive Pulmonary Disease 20
Diabetes 26
Dementia 13
Cancer 11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2019 were aspiration, injections, X-rays and inpatient care.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 260
doctor visit 702
fracture surgery 11
hospital care 74
immobilization 14
injections 260
inpatient care 74
joint surgery 11
lower extremity surgery 11
musculoskeletal imaging 73
open surgery 11
pelvic imaging 14
reconstructive surgery 11
spinal procedures 14
X-rays 101

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 167
Female 264
Ethnicity
Non-Hispanic White 384
Black 0
Hispanic 19
Asian 0
Other 15
Native American 0
Age
From 65 to 74 191
From 75 to 84 118
85 and over 86
Less than 65 36

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2019

Hypertension 64
High Cholesterol 57
Stroke 3
Ischemic Heart Disease 33
Depression 28
Chronic Kidney Disease 26
Asthma 8
Osteoperosis 10
Atrial Fibrilation 14
Heart Failure 20
Chronic Obstructive Pulmonary Disease 15
Diabetes 23
Dementia 14
Cancer 11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2020 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 198
doctor visit 463
hospital care 15
injections 198
inpatient care 15
musculoskeletal imaging 45
pelvic imaging 17
X-rays 62

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 140
Female 178
Ethnicity
Non-Hispanic White 280
Black 0
Hispanic 20
Asian 0
Other 0
Native American 0
Age
From 65 to 74 135
From 75 to 84 101
85 and over 52
Less than 65 30

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2020

Hypertension 66
High Cholesterol 54
Stroke 0
Ischemic Heart Disease 36
Depression 28
Chronic Kidney Disease 29
Asthma 8
Osteoperosis 8
Atrial Fibrilation 12
Heart Failure 19
Chronic Obstructive Pulmonary Disease 17
Diabetes 30
Dementia 12
Cancer 11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2021 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 219
doctor visit 553
hospital care 35
injections 219
inpatient care 35
musculoskeletal imaging 77
pelvic imaging 26
spinal procedures 18
X-rays 121

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 117
Female 212
Ethnicity
Non-Hispanic White 295
Black 0
Hispanic 17
Asian 0
Other 0
Native American 0
Age
From 65 to 74 128
From 75 to 84 119
85 and over 50
Less than 65 32

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2021

Hypertension 67
High Cholesterol 59
Stroke 6
Ischemic Heart Disease 34
Depression 29
Chronic Kidney Disease 33
Asthma 11
Osteoperosis 13
Atrial Fibrilation 14
Heart Failure 17
Chronic Obstructive Pulmonary Disease 14
Diabetes 25
Dementia 14
Cancer 12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2022 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 246
doctor visit 604
hospital care 12
injections 246
inpatient care 12
musculoskeletal imaging 92
X-rays 92

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 132
Female 213
Ethnicity
Non-Hispanic White 303
Black 0
Hispanic 22
Asian 0
Other 0
Native American 0
Age
From 65 to 74 124
From 75 to 84 132
85 and over 66
Less than 65 23

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2022

Hypertension 74
High Cholesterol 72
Stroke 8
Ischemic Heart Disease 26
Depression 23
Chronic Kidney Disease 19
Asthma 13
Osteoperosis 18
Atrial Fibrilation 21
Heart Failure 14
Chronic Obstructive Pulmonary Disease 16
Diabetes 23
Dementia 7
Cancer 17

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2023 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 191
doctor visit 576
injections 207
musculoskeletal imaging 69
pelvic imaging 16
spinal procedures 20
X-rays 105

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 110
Female 220
Ethnicity
Non-Hispanic White 282
Black 0
Hispanic 29
Asian 0
Other 0
Native American 0
Age
From 65 to 74 124
From 75 to 84 127
85 and over 59
Less than 65 20

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2023

Hypertension 75
High Cholesterol 71
Stroke 6
Ischemic Heart Disease 25
Depression 20
Chronic Kidney Disease 22
Asthma 12
Osteoperosis 19
Atrial Fibrilation 18
Heart Failure 15
Chronic Obstructive Pulmonary Disease 14
Diabetes 23
Dementia 8
Cancer 14

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA during 2024 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

aspiration 180
doctor visit 573
hospital care 12
injections 180
inpatient care 12
musculoskeletal imaging 44
spinal procedures 14
X-rays 58

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 144
Female 212
Ethnicity
Non-Hispanic White 305
Black 0
Hispanic 33
Asian 0
Other 0
Native American 0
Age
From 65 to 74 142
From 75 to 84 142
85 and over 45
Less than 65 27

Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD in 2024

Hypertension 72
High Cholesterol 75
Stroke 8
Ischemic Heart Disease 29
Depression 24
Chronic Kidney Disease 26
Asthma 13
Osteoperosis 21
Atrial Fibrilation 24
Heart Failure 19
Chronic Obstructive Pulmonary Disease 15
Diabetes 28
Dementia 9
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Mark R. Northfield, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark R. Northfield, MD treated as a sports medicine doctor in Petaluma, CA were injections, aspiration, X-rays and musculoskeletal imaging.

aspiration 236
doctor visit 643
fracture surgery 11
hip imaging 31
hospital care 36
immobilization 14
injections 246
inpatient care 36
joint surgery 15
lower extremity surgery 15
musculoskeletal imaging 104
open surgery 11
pelvic imaging 17
reconstructive surgery 15
spinal procedures 20
X-rays 130

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Mark R. Northfield, MD.

Gender
Male 136
Female 240
Ethnicity
Black / African American 0
Asian / Pacific Islander 0
Non-Hispanic White 334
Native American / Alaskan Native 0
Hispanic 22
Other 2
Age
75 to 84 120
85 and over 66
Less than 65 38
65 to 74 152

Average of Total of Conditions of Medicare patients treated by Dr. Mark R. Northfield, MD From 2012 - 2024

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

Hypertension 63
High Cholesterol 55
Stroke 4
Ischemic Heart Disease 30
Depression 23
Chronic Kidney Disease 23
Asthma 10
Osteoporosis 12
Heart Failure 16
Chronic Obstructive Pulmonary Disease 14
Diabetes 24
Atrial Fibrillation 14
Cancer 10
Dementia 10

Education & Training

Dr. Mark R. Northfield, MD graduated from Brown University, Alpert Medical School. He is certified by the American Board of Orthopaedic Surgery, Orthopaedic Surgery and has a state license in California.

Medical School: Brown University, Alpert Medical School

Board Certification: American Board of Orthopaedic Surgery, Orthopaedic Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Mark R. Northfield, MD is associated with these hospitals and organizations:

Providence
Providence Medical Foundation

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Mark R. Northfield, MD appears to accept the following insurance providers: Aetna PPO, CIGNA PPO, CIGNA HMO, Western Health Advantage HMO, Blue Shield of California, MultiPlan PPO, Medicare Advantage, HealthSmart, Interplan PPO, TriWest, Anthem Blue Cross HMO, Anthem Blue Cross PPO, Health Net PPO, Health Net HMO, Anthem, Coventry PPO, United Healthcare PPO, United Healthcare HMO, US Family Health Plan, Aetna Medicare PPO, Partnership Health Plan of California and CoventryFirst Health PPO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Mark R. Northfield, MD accepts the following insurance providers:

Aetna PPO
CIGNA PPO
CIGNA HMO
Western Health Advantage HMO
Blue Shield of California
MultiPlan PPO
Medicare Advantage
HealthSmart
Interplan PPO
TriWest
Anthem Blue Cross HMO
Anthem Blue Cross PPO
Health Net PPO
Health Net HMO
Anthem
Coventry PPO
United Healthcare PPO
United Healthcare HMO
US Family Health Plan
Aetna Medicare PPO
Partnership Health Plan of California
CoventryFirst Health PPO

Ratings & Reviews

Dr. Mark R. Northfield, MD has a good overall rating with an average of 2.94 out of 5 stars based on 8 ratings. We collect ratings and reviews of Dr. Mark R. Northfield, MD from all over the web to help you find the right in Petaluma, CA. 

2.94
Overall Rating
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General Payments

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

Payments by Company
Pacific Medical, Inc. $432 ALL ARTHREX PRODUCT LINES
$432
Pacific Medical, Inc $251 ALL ARTHREX PRODUCT LINES
$251
Stryker Corporation $39 Variax
$39
Types of Payments
Education $662
Food and Beverage $59

Biography

Dr. Mark Northfield practices orthopedics/orthopedic surgery and sports medicine. Dr. Northfield's patients gave him an average rating of 2.5 stars (out of 5). Clinical interests for Dr. Northfield include forearm fracture, knee arthritis, and femur (thigh bone) fracture. He is an in-network provider for several insurance carriers, including Anthem, Blue California, and HealthSmart. Dr. Northfield studied medicine at Brown University, Alpert Medical School. He is professionally affiliated with Providence Medical Foundation. According to Providence Medical Foundation, new patients are welcome to contact his office in Petaluma, CA.

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