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Home > CA Providers > Pediatric Orthopedists (Orthopedic Surgeons)
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Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery

Accepting New Patients
Specializes in: Pediatric Orthopedics/Orthopedic Surgery and Hand Surgery
University of Minnesota Medical School
Professional interests include: soft tissue tumor, nerve injury, elbow problems, and more.
744 52nd Street
Oakland, CA 94609

Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery is a pediatric orthopedist in San Francisco, CA specializing in pediatric orthopedics/orthopedic surgery and hand surgery. He graduated from University of Minnesota Medical School. Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery is affiliated with UCSF Health, UCSF Medical Group, UCSF, Brown and Toland Physicians, Sutter Health, Hill Physicians, MATHIAS MASEM MD and Alta Bates Summit Medical Center (Oakland).

View Doctor's Full Profile (510) 428-3238

Office Locations

1500 Owens Street
San Francisco, CA 94158
open_in_new

Hill Physicians

744 52nd Street
Oakland, CA 94609
(510) 428-3238
open_in_new

Sutter Health

80 Grand Avenue 6th Floor
Oakland, CA 94612
(510) 763-0884
open_in_new

Some issues Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery can help you with:

Hip Replacement

Hip replacement is a surgical procedure to replace parts of the hip joint that are damaged by disease or injury. It is most often done to treat arthritis, a common condition that causes stiffness and pain in the joints. Surgery is used only after other, less invasive treatments have failed to work.

The type of hip replacement patients receive is based on their age and the extent of damage to their hip. The hip joint has two parts: the femoral head, or hip ball, and the acetabulum, or hip socket. The hip ball is located on the upper end of the femur (thigh bone), and the hip socket is part of the pelvis. Depending on whether one or both parts require replacement, patients may need one of the following procedures:

  • Partial hip replacement, which is generally recommended in the case of hip fractures or other hip injuries. If a patient is having a partial hip replacement, only the hip ball will be replaced.
  • Total hip replacement, which is often used to treat the hip joint when it has become damaged due to arthritis. Both the hip socket and hip ball are replaced.
  • Hip resurfacing, which is usually performed for younger patients. A hip resurfacing procedure reshapes the hip ball and only replaces its surface. This preserves more bone and makes future surgeries easier. If a patient is having a partial hip resurfacing, only the hip ball is resurfaced and replaced. If a patient is having a total hip resurfacing, the hip socket will be replaced as well.

During hip replacement surgery, an incision is made along the side of the hip. The surgeon may access the joint directly through this incision, or by using small tools and a lighted tube called an arthroscope to see and treat the joint. The diseased tissue is removed, and the bones are smoothed out and fitted with metal ends. The metal pieces may be cemented in place, or they may have a porous structure that encourages bone to grow into them and hold them securely. A smooth plastic cushion is placed between the two bones to replace the cartilage and allow the joint to move freely.

Hip replacement surgery takes one to two hours, and afterwards patients may stay in the hospital for several days. When patients go home, they will have to use a cane, walker, or crutches at first. Patients will likely have physical therapy to improve their ability to move with their new hip. After the first few weeks, light exercise such as bike riding or swimming will help them heal, but certain actions, such as climbing stairs or bending over at the waist, may be difficult at first. It will take several weeks before they can drive or return to work. Full recovery may take six to 12 months.

Noteworthy Medicare Patient Procedures Performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2023

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

Top 5%

By Volume:

endoscopic carpal tunnel surgery

By Affordability:

carpal tunnel surgery
nerve decompression surgery
nerve procedures
nerve surgery
peripheral nerve decompression surgery
peripheral nerve surgery

In 2023, among providers in related specialties within California, Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery performed more endoscopic carpal tunnel surgery procedures for Medicare patients than 95% of them and he also had a list price for carpal tunnel surgery, nerve decompression surgery, nerve procedures, nerve surgery, peripheral nerve decompression surgery, and peripheral nerve surgery that was lower than the list prices billed to Medicare by 95% of them. 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.

Top 25%

By Affordability:

decompression surgery

In 2013, Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery had a list price for decompression surgery that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2013 were injections, aspiration, upper extremity surgery and tendon surgery.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 61
decompression surgery 14
doctor visit 530
immobilization 11
injections 97
joint surgery 14
nerve procedures 14
open surgery 14
synovectomy 14
tendon surgery 34
upper extremity surgery 48

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 87
Female 143
Ethnicity
Non-Hispanic White 129
Black 62
Hispanic 0
Asian 18
Other 0
Native American 0
Age
From 65 to 74 118
From 75 to 84 45
85 and over 14
Less than 65 53

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2013

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2013 were hypertension, high cholesterol, diabetes and depression.

Hypertension 54
High Cholesterol 43
Stroke 0
Ischemic Heart Disease 19
Depression 22
Chronic Kidney Disease 15
Asthma 8
Osteoperosis 0
Atrial Fibrilation 0
Heart Failure 11
Chronic Obstructive Pulmonary Disease 6
Diabetes 27
Dementia 0
Cancer 10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2014 were injections, upper extremity surgery, aspiration and joint surgery.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 31
decompression surgery 12
doctor visit 434
immobilization 23
injections 70
joint surgery 27
nerve block 19
nerve procedures 12
open surgery 12
reconstructive surgery 16
synovectomy 11
tendon surgery 11
upper extremity surgery 39

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 86
Female 142
Ethnicity
Non-Hispanic White 137
Black 52
Hispanic 0
Asian 22
Other 0
Native American 0
Age
From 65 to 74 109
From 75 to 84 60
85 and over 18
Less than 65 41

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2014

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2014 were hypertension, high cholesterol, depression and diabetes.

Hypertension 57
High Cholesterol 49
Stroke 0
Ischemic Heart Disease 20
Depression 23
Chronic Kidney Disease 14
Asthma 6
Osteoperosis 9
Atrial Fibrilation 6
Heart Failure 11
Chronic Obstructive Pulmonary Disease 5
Diabetes 22
Dementia 0
Cancer 7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2015 were injections, aspiration, upper extremity surgery and immobilization.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 60
decompression surgery 12
doctor visit 538
immobilization 15
injections 100
joint surgery 11
nerve procedures 12
open surgery 12
synovectomy 11
tendon surgery 11
upper extremity surgery 23

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 142
Female 322
Ethnicity
Non-Hispanic White 290
Black 108
Hispanic 0
Asian 24
Other 0
Native American 0
Age
From 65 to 74 260
From 75 to 84 104
85 and over 30
Less than 65 70

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2015

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2015 were hypertension, high cholesterol, depression and diabetes.

Hypertension 47
High Cholesterol 37
Stroke 0
Ischemic Heart Disease 14
Depression 23
Chronic Kidney Disease 15
Asthma 10
Osteoperosis 6
Atrial Fibrilation 7
Heart Failure 7
Chronic Obstructive Pulmonary Disease 7
Diabetes 20
Dementia 0
Cancer 10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2016 were injections, aspiration, upper extremity surgery and tendon surgery.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 100
decompression surgery 15
doctor visit 647
immobilization 25
injections 142
joint surgery 13
musculoskeletal imaging 11
nerve block 11
nerve procedures 15
open surgery 15
synovectomy 34
tendon surgery 55
upper extremity surgery 70
X-rays 11

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 103
Female 180
Ethnicity
Non-Hispanic White 177
Black 64
Hispanic 17
Asian 0
Other 0
Native American 0
Age
From 65 to 74 146
From 75 to 84 70
85 and over 17
Less than 65 50

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2016

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2016 were hypertension, high cholesterol, depression and diabetes.

Hypertension 50
High Cholesterol 36
Stroke 0
Ischemic Heart Disease 16
Depression 20
Chronic Kidney Disease 16
Asthma 16
Osteoperosis 6
Atrial Fibrilation 6
Heart Failure 7
Chronic Obstructive Pulmonary Disease 7
Diabetes 20
Dementia 4
Cancer 11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2017 were injections, aspiration, upper extremity surgery and nerve procedures.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 88
decompression surgery 19
doctor visit 701
injections 149
joint surgery 19
musculoskeletal imaging 13
nerve block 15
nerve procedures 19
open surgery 19
synovectomy 19
tendon surgery 19
upper extremity surgery 38
X-rays 13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 132
Female 197
Ethnicity
Non-Hispanic White 194
Black 75
Hispanic 20
Asian 27
Other 13
Native American 0
Age
From 65 to 74 168
From 75 to 84 96
85 and over 13
Less than 65 52

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2017

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2017 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 53
High Cholesterol 38
Stroke 0
Ischemic Heart Disease 20
Depression 21
Chronic Kidney Disease 21
Asthma 10
Osteoperosis 9
Atrial Fibrilation 8
Heart Failure 9
Chronic Obstructive Pulmonary Disease 6
Diabetes 26
Dementia 6
Cancer 15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2018 were injections and aspiration.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 71
doctor visit 591
injections 166

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 89
Female 173
Ethnicity
Non-Hispanic White 167
Black 54
Hispanic 14
Asian 16
Other 0
Native American 0
Age
From 65 to 74 135
From 75 to 84 73
85 and over 14
Less than 65 40

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2018

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2018 were hypertension, high cholesterol, chronic kidney disease and diabetes.

Hypertension 54
High Cholesterol 42
Stroke 0
Ischemic Heart Disease 19
Depression 24
Chronic Kidney Disease 27
Asthma 11
Osteoperosis 12
Atrial Fibrilation 7
Heart Failure 9
Chronic Obstructive Pulmonary Disease 8
Diabetes 25
Dementia 5
Cancer 11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2019 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 107
doctor visit 630
injections 191
musculoskeletal imaging 17
X-rays 17

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 129
Female 179
Ethnicity
Non-Hispanic White 186
Black 55
Hispanic 14
Asian 26
Other 27
Native American 0
Age
From 65 to 74 163
From 75 to 84 90
85 and over 21
Less than 65 34

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2019

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2019 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 48
High Cholesterol 42
Stroke 0
Ischemic Heart Disease 20
Depression 20
Chronic Kidney Disease 21
Asthma 10
Osteoperosis 11
Atrial Fibrilation 6
Heart Failure 9
Chronic Obstructive Pulmonary Disease 7
Diabetes 22
Dementia 5
Cancer 14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2020 were injections, aspiration, immobilization and X-rays.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 79
doctor visit 572
immobilization 23
injections 124
musculoskeletal imaging 14
X-rays 14

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 112
Female 149
Ethnicity
Non-Hispanic White 170
Black 47
Hispanic 0
Asian 18
Other 0
Native American 0
Age
From 65 to 74 153
From 75 to 84 66
85 and over 19
Less than 65 23

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2020

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2020 were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension 48
High Cholesterol 42
Stroke 0
Ischemic Heart Disease 20
Depression 18
Chronic Kidney Disease 22
Asthma 8
Osteoperosis 10
Atrial Fibrilation 7
Heart Failure 9
Chronic Obstructive Pulmonary Disease 5
Diabetes 18
Dementia 0
Cancer 11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2021 were injections and aspiration.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 84
doctor visit 535
injections 116

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 91
Female 145
Ethnicity
Non-Hispanic White 160
Black 41
Hispanic 0
Asian 17
Other 0
Native American 0
Age
From 65 to 74 130
From 75 to 84 70
85 and over 16
Less than 65 20

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2021

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2021 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 54
High Cholesterol 56
Stroke 0
Ischemic Heart Disease 25
Depression 22
Chronic Kidney Disease 22
Asthma 9
Osteoperosis 11
Atrial Fibrilation 6
Heart Failure 7
Chronic Obstructive Pulmonary Disease 5
Diabetes 17
Dementia 0
Cancer 13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2022 were injections, aspiration, upper extremity surgery and tendon surgery.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 101
decompression surgery 15
doctor visit 533
injections 118
minimally invasive procedures 15
nerve procedures 15
tendon surgery 17
upper extremity surgery 32

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 103
Female 133
Ethnicity
Non-Hispanic White 169
Black 27
Hispanic 0
Asian 0
Other 18
Native American 0
Age
From 65 to 74 112
From 75 to 84 87
85 and over 19
Less than 65 18

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2022

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2022 were high cholesterol, hypertension, depression and cancer.

Hypertension 62
High Cholesterol 70
Stroke 0
Ischemic Heart Disease 17
Depression 20
Chronic Kidney Disease 14
Asthma 11
Osteoperosis 15
Atrial Fibrilation 12
Heart Failure 8
Chronic Obstructive Pulmonary Disease 6
Diabetes 18
Dementia 0
Cancer 19

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA during 2023 were aspiration, injections, nerve procedures and minimally invasive procedures.

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

aspiration 105
decompression surgery 16
doctor visit 502
injections 105
minimally invasive procedures 16
nerve procedures 16
upper extremity surgery 16

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 96
Female 136
Ethnicity
Non-Hispanic White 160
Black 31
Hispanic 0
Asian 17
Other 0
Native American 0
Age
From 65 to 74 120
From 75 to 84 78
85 and over 17
Less than 65 17

Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery in 2023

The most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated during 2023 were high cholesterol, hypertension, cancer and depression.

Hypertension 58
High Cholesterol 69
Stroke 7
Ischemic Heart Disease 16
Depression 19
Chronic Kidney Disease 12
Asthma 8
Osteoperosis 16
Atrial Fibrilation 10
Heart Failure 9
Chronic Obstructive Pulmonary Disease 0
Diabetes 19
Dementia 0
Cancer 19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery for Medicare patients.

The highest averages for the top procedures that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated as a pediatric orthopedist in San Francisco, CA were injections, aspiration, upper extremity surgery and tendon surgery.

aspiration 80
decompression surgery 14
doctor visit 564
immobilization 19
injections 125
joint surgery 16
minimally invasive procedures 15
musculoskeletal imaging 13
nerve block 15
nerve procedures 14
open surgery 14
reconstructive surgery 16
synovectomy 17
tendon surgery 24
upper extremity surgery 38
X-rays 13

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery.

Gender
Male 106
Female 172
Ethnicity
Black / African American 56
Asian / Pacific Islander 16
Non-Hispanic White 176
Hispanic 5
Native American / Alaskan Native 0
Other 5
Age
75 to 84 76
85 and over 18
Less than 65 38
65 to 74 146

Average of Total of Conditions of Medicare patients treated by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery treated were hypertension, high cholesterol, depression and diabetes.

Hypertension 53
High Cholesterol 47
Stroke 0
Ischemic Heart Disease 18
Depression 21
Chronic Kidney Disease 18
Asthma 9
Osteoporosis 9
Heart Failure 8
Chronic Obstructive Pulmonary Disease 5
Diabetes 21
Atrial Fibrillation 6
Dementia 1
Cancer 12

Education & Training

Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery graduated from University of Minnesota Medical School. He completed residency at University of California, San Francisco (UCSF) Affiliated Hospitals. He is certified by the Board Certification: Not ABMS Specialty and has a state license in California.

Medical School: University of Minnesota Medical School

Residency: University of California, San Francisco (UCSF) Affiliated Hospitals

Board Certification: Board Certification: Not ABMS Specialty

Licensed In: California

Affiliations & Hospitals

Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery is associated with these hospitals and organizations:

UCSF Health
UCSF Medical Group
UCSF
Brown and Toland Physicians
Sutter Health
Hill Physicians
MATHIAS MASEM MD
Alta Bates Summit Medical Center (Oakland)

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. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery appears to accept the following insurance providers: Cigna, Aetna, Blue Shield of California, Anthem, UnitedHealthcare, Health Net, Chinese Community Health Plan, Central Health Plan and Canopy Health.

Insurance Accepted by Provider includes:

According to our sources, Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery accepts the following insurance providers:

Cigna
Aetna
Blue Shield of California
Anthem
UnitedHealthcare
Health Net
Chinese Community Health Plan
Central Health Plan
Canopy Health

Ratings & Reviews

Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery has an exceptional overall rating with an average of 4.62 out of 5 stars based on 40 ratings. We collect ratings and reviews of Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery from all over the web to help you find the right in San Francisco, CA. 

4.62
Overall Rating
Leave a Review
Reviews From Around The Web
Overall Rating: 5.0 2025-09-08
Patient verified via Press Ganey
Dr. Masem and his care team are amazing
Overall Rating: 5.0 2025-03-31
Patient verified via Press Ganey
The best

General Payments

These charts describe general payments received by Dr. Mathias A. Masem, MD, Orthopedic Surgery | Hand Surgery. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

Payments by Company
EVOLUTION SURGICAL, INC $2,438
$2,438
TriMed, Inc. $1,331
$1,331
AXOGEN $437 AxoGuard Nerve Cap
$290 		AVANCE NERVE GRAFT
$111 		AxoGuard Nerve Protector
$36
Skeletal Dynamics Inc $151 Implate
$151
Halyard Health, Inc. $114 SURGICAL PAIN REGIONAL ANESTHESIA
$114
Other $802 VersaWrap
$108 		Sports Med Small Joint
$104 		BSBHT - BGS BHS STIMULATORS
$97 		Implate
$89 		INnate Implant
$71 		Other
$333
Types of Payments
Education $2,400
Food and Beverage $2,286
Travel and Lodging $586

Biography

Dr. Mathias Masem is a pediatric orthopedics/orthopedic surgery and hand surgery specialist in Oakland, CA and San Francisco, CA. The average patient rating for Dr. Masem is 4.5 stars (out of 5). His clinical interests include meniscus repair, osteomyelitis, and soft tissue tumor. Dr. Masem's hospital/clinic affiliations include UCSF Medical Group, Brown and Toland Physicians, and Hill Physicians. He appears to be an in-network provider for Blue Shield, Health Net, and Anthem, in addition to other insurance carriers. Dr. Masem has an open panel in Oakland, CA according to Brown and Toland Physicians. He graduated from the University of Minnesota Medical School. Dr. Masem trained at Robert Wood Johnson University Hospital and a hospital affiliated with the University of California, San Francisco (UCSF) for residency. He has received the following distinction: San Francisco Super Doctors. In addition to English, he speaks German.

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