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Dr. Maki Yamamoto, MD

Accepting New Patients

(Maki Yamamoto, MD)

(354 Ratings)

Specializes in: General Surgery, Oncology (Cancer Care), General Practice and Surgical Oncology (Cancer Surgery)

New York Medical College (2004)

Professional interests include: cancer, soft tissue sarcoma, endocrine diseases (hormone disorders), and more.

1640 Newport Boulevard Suite 350
Costa Mesa, CA 92627

(949) 238-4100

Dr. Maki Yamamoto, MD is a general surgeon in Costa Mesa, CA specializing in general surgery, oncology (cancer care), general practice and surgical oncology (cancer surgery). She graduated from New York Medical College in 2004 and has 21 years of experience. Dr. Maki Yamamoto, MD is affiliated with UCI Health, UNIVERSITY SURGEONS OF ORANGE A MEDICAL GROUP and UCI Health — Costa Mesa.

Office Locations

1640 Newport Boulevard Suite 350
Costa Mesa, CA 92627

open_in_new

101 The City Drive South Building 22C
Orange, CA 92868

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23961 Calle De La Magdalena
Laguna Hills, CA 92653

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101 The City Drive South Building 23
Orange, CA 92868

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1640 Newport Boulevard Suite 100
Costa Mesa, CA 92627

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19208 Jamboree Road
Irvine, CA 92612

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In The News (see more mentions in the news)

“Dr. Justin Moyers (left) and Dr. Maki Yamamoto (right), from the UCI Medical Center, celebrating with Rich Archbold on Tuesday, Jan. 31, after a biopsy showed there was no evidence of cancer in...”—"Rich Archbold: My fight against cancer continues - but so far, so good", Press Telegram, January 2025

“The brightest moment came in February, when Dr. Maki Yamamoto, my surgeon/oncologist at UCI's Chao Cancer Center, called me with the great news that the latest biopsy showed no sign of cancer in my...”—"Rich Archbold: Bumpy cancer road is a little smoother in the new year", Press Telegram, December 2023

“But I am fully supportive and obviously listening to the better judgment of my oncologist (Dr. Maki Yamamoto) who's been terrific.”—"Ducks assistant Stothers has melanoma, intends to continue role", New York Times, March 2023

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

doctor visit	16

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	15
Female	11

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2014

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2014 were hypertension and high cholesterol.

Hypertension	54
High Cholesterol	42
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2015 were diagnostic procedures and lymph node procedures.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	22
doctor visit	233
lymph node procedures	16

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	234
Female	118

**Ethnicity**
Non-Hispanic White	304
Black	0
Hispanic	0
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	120
85 and over	66
Less than 65	30

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2015

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2015 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	71
High Cholesterol	53
Stroke	9
Ischemic Heart Disease	38
Depression	15
Chronic Kidney Disease	34
Asthma	8
Osteoperosis	7
Atrial Fibrilation	18
Heart Failure	21
Chronic Obstructive Pulmonary Disease	10
Diabetes	28
Dementia	14
Cancer	24

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2016 were diagnostic procedures, lymph node procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	23
doctor visit	308
hospital care	12
inpatient care	12
lymph node procedures	20

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	151
Female	86

**Ethnicity**
Non-Hispanic White	194
Black	0
Hispanic	15
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	96
85 and over	33
Less than 65	20

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2016

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2016 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	73
High Cholesterol	61
Stroke	8
Ischemic Heart Disease	43
Depression	18
Chronic Kidney Disease	35
Asthma	14
Osteoperosis	9
Atrial Fibrilation	18
Heart Failure	23
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2017 were hospital care, inpatient care, diagnostic procedures and open surgery.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	25
doctor visit	318
excision	13
hospital care	28
inpatient care	28
lymph node procedures	13
open surgery	13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	186
Female	97

**Ethnicity**
Non-Hispanic White	229
Black	0
Hispanic	18
Asian	19
Other	0
Native American	0

**Age**
From 65 to 74	130
From 75 to 84	97
85 and over	34
Less than 65	22

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2017

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2017 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	70
High Cholesterol	58
Stroke	6
Ischemic Heart Disease	38
Depression	19
Chronic Kidney Disease	32
Asthma	7
Osteoperosis	10
Atrial Fibrilation	19
Heart Failure	19
Chronic Obstructive Pulmonary Disease	11
Diabetes	29
Dementia	12
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2018 were diagnostic procedures, open surgery, lymph node procedures and excision.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	39
doctor visit	339
excision	24
lymph node procedures	24
open surgery	24

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	193
Female	109

**Ethnicity**
Non-Hispanic White	262
Black	0
Hispanic	15
Asian	14
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	110
85 and over	38
Less than 65	18

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2018

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2018 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	64
High Cholesterol	62
Stroke	6
Ischemic Heart Disease	37
Depression	18
Chronic Kidney Disease	35
Asthma	6
Osteoperosis	5
Atrial Fibrilation	12
Heart Failure	19
Chronic Obstructive Pulmonary Disease	9
Diabetes	29
Dementia	10
Cancer	18

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2019 were lymph node procedures, open surgery, diagnostic procedures and excision.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	16
doctor visit	347
excision	16
hospital care	12
inpatient care	12
lymph node procedures	40
open surgery	16

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	213
Female	111

**Ethnicity**
Non-Hispanic White	267
Black	0
Hispanic	0
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	127
85 and over	35
Less than 65	26

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2019

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2019 were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	66
High Cholesterol	64
Stroke	5
Ischemic Heart Disease	36
Depression	21
Chronic Kidney Disease	36
Asthma	8
Osteoperosis	7
Atrial Fibrilation	16
Heart Failure	18
Chronic Obstructive Pulmonary Disease	10
Diabetes	31
Dementia	7
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2020 were lymph node procedures, open surgery, diagnostic procedures and excision.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	11
doctor visit	314
excision	11
lymph node procedures	28
open surgery	11

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	183
Female	100

**Ethnicity**
Non-Hispanic White	226
Black	0
Hispanic	20
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	111
From 75 to 84	113
85 and over	39
Less than 65	20

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2020

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2020 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	72
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	43
Depression	19
Chronic Kidney Disease	36
Asthma	8
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	31
Dementia	8
Cancer	22

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2021 were lymph node procedures.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

doctor visit	350
lymph node procedures	16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	176
Female	111

**Ethnicity**
Non-Hispanic White	233
Black	0
Hispanic	18
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	118
From 75 to 84	117
85 and over	34
Less than 65	18

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2021

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2021 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	70
High Cholesterol	72
Stroke	7
Ischemic Heart Disease	46
Depression	17
Chronic Kidney Disease	37
Asthma	7
Osteoperosis	11
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	11
Diabetes	28
Dementia	13
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2022 were lymph node procedures, open surgery, diagnostic procedures and excision.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	13
doctor visit	384
excision	13
lymph node procedures	31
open surgery	13

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	181
Female	128

**Ethnicity**
Non-Hispanic White	258
Black	0
Hispanic	17
Asian	22
Other	12
Native American	0

**Age**
From 65 to 74	120
From 75 to 84	118
85 and over	54
Less than 65	17

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2022

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2022 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	74
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	24
Asthma	9
Osteoperosis	19
Atrial Fibrilation	19
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	28
Dementia	8
Cancer	21

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA during 2023 were lymph node procedures, open surgery, diagnostic procedures and excision.

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

diagnostic procedures	11
doctor visit	394
excision	11
lymph node procedures	26
open surgery	11

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	200
Female	134

**Ethnicity**
Non-Hispanic White	274
Black	0
Hispanic	23
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	140
From 75 to 84	136
85 and over	44
Less than 65	14

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2023

The most common conditions of Medicare patients that Dr. Maki Yamamoto, MD treated during 2023 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	72
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	25
Asthma	7
Osteoperosis	12
Atrial Fibrilation	22
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	25
Dementia	5
Cancer	24

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2014 - 2023

Volume of procedures performed by Dr. Maki Yamamoto, MD for Medicare patients.

The highest averages for the top procedures that Dr. Maki Yamamoto, MD treated as a general surgeon in Costa Mesa, CA were lymph node procedures, diagnostic procedures, hospital care and inpatient care.

diagnostic procedures	20
doctor visit	300
excision	14
hospital care	17
inpatient care	17
lymph node procedures	23
open surgery	14

Average Medicare Patient Data From 2014 - 2023

Information about Medicare patients treated by Dr. Maki Yamamoto, MD.

**Gender**
Male	173
Female	100

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	19
Non-Hispanic White	224
Hispanic	12
Native American / Alaskan Native	0
Other	1

**Age**
75 to 84	103
85 and over	37
Less than 65	18
65 to 74	111

Average of Total of Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD From 2014 - 2023

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

Hypertension	68
High Cholesterol	62
Stroke	6
Ischemic Heart Disease	33
Depression	16
Chronic Kidney Disease	29
Asthma	7
Osteoporosis	8
Heart Failure	16
Chronic Obstructive Pulmonary Disease	9
Diabetes	25
Atrial Fibrillation	15
Dementia	8
Cancer	17

Education & Training

Dr. Maki Yamamoto, MD graduated from New York Medical College in 2004. She completed residency at UCI Department of Surgery - General Surgery. She is certified by the American Board of Surgery - Complex General Surgical Oncology American Board of Surgery - Surgery and has a state license in California.

Medical School: New York Medical College (2004)

Residency: UCI Department of Surgery - General Surgery

Board Certification: American Board of Surgery - Complex General Surgical Oncology American Board of Surgery - Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Maki Yamamoto, MD is associated with these hospitals and organizations:

UCI Health

UNIVERSITY SURGEONS OF ORANGE A MEDICAL GROUP

UCI Health — Costa Mesa

Ratings & Reviews

Dr. Maki Yamamoto, MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 354 ratings. We collect ratings and reviews of Dr. Maki Yamamoto, MD from all over the web to help you find the right in Costa Mesa, CA.

4.9

Overall Rating

(354 Ratings)

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General Payments

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

**Payments by Company**
Amgen Inc.	$18,797 IMLYGIC $18,797
Ethicon US, LLC	$236 ENSEAL Product Family $130	Energy: Harmonic $107
Bayer HealthCare Pharmaceuticals Inc.	$144 Stivarga $114	Nexavar $30
Pacira Pharmaceuticals Incorporated	$131 Exparel $131
Genentech, Inc.	$68 $68
Other	$62 Urology $62

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$15,200
Travel and Lodging	$3,154
Food and Beverage	$1,085

Biography

Dr. Maki Yamamoto's medical specialty is general surgery and surgical oncology (cancer surgery). She graduated from New York Medical College. Clinical interests for Dr. Yamamoto include cancer surgery, adrenal tumor, and soft tissue sarcoma. Dr. Yamamoto has received the following distinction: Physicians of Excellence, Orange County Medical Association. She is professionally affiliated with UCI Health. According to Yext, she is currently accepting new patients at her office in Costa Mesa, CA.

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Dr. Maki Yamamoto, MD

Office Locations

In The News (see more mentions in the news)

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2014 - 2023

Average Medicare Patient Data From 2014 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Maki Yamamoto, MD From 2014 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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