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Home > CA Providers > Allergists & Immunologists

Dr. Denis J. Yoshii, DO

Accepting New Patients

(18 Ratings)

Specializes in: Allergy & Immunology

Western University of Health Sciences, College of Osteopathic Medicine of the Pacific (1995)

Professional interests include: milk allergy, allergy testing, seasonal allergies, and more.

26750 Towne Centre Drive Suite D
Foothill Ranch, CA 92610

(949) 916-0888

Dr. Denis J. Yoshii, DO is an allergist and immunologist in Foothill Ranch, CA specializing in allergy & immunology. He graduated from Western University of Health Sciences, College of Osteopathic Medicine of the Pacific in 1995 and has 31 years of experience. Dr. Denis J. Yoshii, DO is affiliated with Providence, Hoag, Providence Medical Foundation, Adams Allergy and Providence Affiliated Physicians, Mission.

Office Locations

26750 Towne Centre Drive Suite D
Foothill Ranch, CA 92610

(949) 916-0888

open_in_new

1700 Adams Avenue Suite 100
Costa Mesa, CA 92626

(714) 549-0301

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26750 Towne Centre Drive
Ste D Foothill Ranch, CA 92610

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Some issues Dr. Denis J. Yoshii, DO can help you with:

Asthma

Asthma is a chronic lung disease where the tissue and airways of the lungs become extremely sensitive to certain substances. When these substances are breathed in, the lungs become inflamed. The muscles around the airways tighten and squeeze the lungs, and passages within the lungs swell and tighten. The airways themselves produce mucus, which further clogs the tightened, swollen airways. A person having an asthma attack finds it very difficult to breathe, and a severe attack can even be fatal.

Asthma affects people of all ages, but people with asthma are most often diagnosed as children. Symptoms can include wheezing, a tight feeling in the chest, shortness of breath, and coughing. Some people have mild symptoms all the time, and some people have no symptoms at all, but everyone with asthma is susceptible to occasional severe attacks or flare-ups of symptoms when they are exposed to triggers. Triggers vary widely but can include:

Allergens (dust mites, pet fur, mold, pollen, grass)
Irritants (smoke, pollution, dust, chemicals)
Viral infections
Physical activity, especially outdoors
Certain medications or chemicals in foods (aspirin, sulfites)

Treatment for most asthma patients involves three steps. Patients learn what their asthma triggers are and avoid them. They take a daily control medication, usually an inhaled corticosteroid, to reduce inflammation in the lungs. Also, they have rescue medication with them at all times to take in case of a severe attack. These quick-acting inhaled medications relax the muscles around the airways and allow the lungs to open up for air.

There is no cure for asthma, but with treatment it should not interfere with daily life and activities.

Subcutaneous Allergen Immunotherapy (Allergy Shots)

Also known as allergy shots, subcutaneous allergen immunotherapy is a treatment in which gradually increasing doses of an allergen are injected under the skin. An allergen is a substance that can bring about an allergic reaction. Pollen, dust mites, and pet dander are the most common examples of these substances. When patients receive an allergy shot, their body produces "blocking" antibodies that decrease the immune system's sensitivity to an allergen, thus reducing their symptoms.

Before treatment is begun, patients and their doctors first have to identify different factors that trigger their symptoms. Then, skin tests are done to confirm which substances cause allergic reactions. Blood tests may be performed as well, but they are typically not necessary.

There are two phases to subcutaneous allergen immunotherapy: a build-up phase and a maintenance phase. The build-up phase lasts three to six months, during which patients receive shots with increasing amounts of the allergens once or twice a week. When the effective dose is reached, the maintenance phase begins and may continue for up to five years.

Although allergy shots are the longest-lasting and most effective allergy treatment available, they are not for everyone. If patients have heart problems, high blood pressure, or severe asthma, they should not be given allergy shots. The injections are generally safe, but they may have a little swelling at the injection site, which is normal. Rarely, severe shock-like reactions, called anaphylaxis, can also occur. Patients will likely be required by their doctor to stay for half an hour after their shot, so in the event of an anaphylactic reaction, it can be treated immediately.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	95

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2013 were preventive care and vaccines.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	108
preventive care	11
vaccines	11

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	14
Female	35

**Age**
From 65 to 74	27
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2013

Hypertension	47
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	0
Depression	29
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

2014 Medicare Procedure Volume

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	115

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	16
Female	39

**Age**
From 65 to 74	33
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2014

Hypertension	45
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	25
Depression	0
Chronic Kidney Disease	0
Asthma	20
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

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	108

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	26
Female	76

**Age**
From 65 to 74	60
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2015

Hypertension	41
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	24
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2016 were immunotherapy and injections.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	119
immunotherapy	209
injections	209

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	15
Female	43

**Age**
From 65 to 74	37
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2016

Hypertension	53
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	34
Depression	0
Chronic Kidney Disease	21
Asthma	22
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2017 were skin testing, minimally invasive procedures, allergy testing and immunotherapy.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

allergy testing	1502
doctor visit	102
immunotherapy	322
injections	322
minimally invasive procedures	1502
preventive care	11
skin testing	1502
vaccines	11

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	15
Female	48

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

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2017

Hypertension	52
High Cholesterol	37
Stroke	0
Ischemic Heart Disease	21
Depression	0
Chronic Kidney Disease	0
Asthma	17
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2018 were skin testing, minimally invasive procedures, allergy testing and immunotherapy.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

allergy testing	1208
doctor visit	89
immunotherapy	309
injections	309
minimally invasive procedures	1208
preventive care	11
skin testing	1208
vaccines	11

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	16
Female	48

**Age**
From 65 to 74	39
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2018

Hypertension	53
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	30
Depression	19
Chronic Kidney Disease	0
Asthma	25
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2019 were immunotherapy and injections.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	86
immunotherapy	178
injections	178

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	15
Female	41

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

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

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2019

Hypertension	52
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	34
Depression	0
Chronic Kidney Disease	0
Asthma	21
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	20
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	67

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	15
Female	31

**Age**
From 65 to 74	29
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2020

Hypertension	57
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	24
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

2021 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2021 were immunotherapy and injections.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	96
immunotherapy	117
injections	117

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	13
Female	37

**Age**
From 65 to 74	25
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2021

Hypertension	56
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	22
Depression	0
Chronic Kidney Disease	0
Asthma	22
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA during 2022 were immunotherapy and injections.

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	51
immunotherapy	163
injections	163

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	17
Female	30

**Age**
From 65 to 74	25
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2022

Hypertension	62
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	32
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	68

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	14
Female	32

**Age**
From 65 to 74	29
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2023

Hypertension	52
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	28
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

doctor visit	90

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	14
Female	39

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

**Age**
From 65 to 74	28
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2024

Hypertension	74
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	25
Depression	21
Chronic Kidney Disease	25
Asthma	43
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Denis J. Yoshii, DO for Medicare patients.

The highest averages for the top procedures that Dr. Denis J. Yoshii, DO treated as an allergist and immunologist in Foothill Ranch, CA were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

allergy testing	1355
doctor visit	91
immunotherapy	216
injections	216
minimally invasive procedures	1355
preventive care	11
skin testing	1355
vaccines	11

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Denis J. Yoshii, DO.

**Gender**
Male	14
Female	38

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	6
Hispanic	0
Native American / Alaskan Native	0
Other	0

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

Average of Total of Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Denis J. Yoshii, DO treated were high cholesterol, hypertension, asthma and ischemic heart disease.

Hypertension	49
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	16
Depression	5
Chronic Kidney Disease	3
Asthma	19
Osteoporosis	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	7
Atrial Fibrillation	0
Cancer	0
Dementia	0

Education & Training

Dr. Denis J. Yoshii, DO graduated from Western University of Health Sciences, College of Osteopathic Medicine of the Pacific in 1995. He completed residency at University of California, Irvine Affiliated Hospitals. He is certified by the American Board of Pediatrics - Pediatrics and has a state license in Nevada.

Medical School: Western University of Health Sciences, College of Osteopathic Medicine of the Pacific (1995)

Residency: University of California, Irvine Affiliated Hospitals

Board Certification: American Board of Pediatrics - Pediatrics

Licensed In: Nevada

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. Denis J. Yoshii, DO appears to accept the following insurance providers: Anthem Blue Cross HMO, Aetna HMO, Blue Shield of California, United Healthcare HMO, Anthem, Medicare Advantage, Providence, Health Net HMO and CIGNA HMO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Denis J. Yoshii, DO accepts the following insurance providers:

Anthem Blue Cross HMO

Aetna HMO

Blue Shield of California

United Healthcare HMO

Anthem

Medicare Advantage

Providence

Health Net HMO

CIGNA HMO

Ratings & Reviews

Dr. Denis J. Yoshii, DO has a high overall rating with an average of 4.03 out of 5 stars based on 18 ratings. We collect ratings and reviews of Dr. Denis J. Yoshii, DO from all over the web to help you find the right in Foothill Ranch, CA.

4.03

Overall Rating

(18 Ratings)

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General Payments

These charts describe general payments received by Dr. Denis J. Yoshii, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
GlaxoSmithKline, LLC.	$1,250 NUCALA $491	TRELEGY ELLIPTA $248	BREO $232	ARNUITY ELLIPTA $126	INCRUSE $109	Other $45
Regeneron Healthcare Solutions, Inc.	$874 DUPIXENT $752	DUPIXENT DUPILUMAB INJECTION $122
Pfizer Inc.	$830 EUCRISA $815	CIBINQO $15
Meda Pharmaceuticals, Inc.	$722 Aerospan $458	Dymista $263
GENZYME CORPORATION	$709 DUPIXENT $709
Other	$4,312 PROAIR $304	Hizentra $265	Xembify $243	GRASTEK $220	Gammaplex 10% $184	Other $3,095

**Types of Payments**
Food and Beverage	$8,256
Education	$291
Consulting Fee	$150

Biography

Dr. Denis Yoshii is a physician who specializes in allergy & immunology. After attending Western University of Health Sciences, College of Osteopathic Medicine of the Pacific for medical school, Dr. Yoshii completed his residency training at a hospital affiliated with the University of California, Irvine. These areas are among his clinical interests: anaphylaxis, allergic contact dermatitis, and drug allergy. He is rated highly by his patients. Dr. Yoshii can take several insurance carriers, including United Healthcare HMO, Anthem, and Blue Cross/Blue Shield. He is affiliated with Hoag and Providence Medical Foundation. His practice in Costa Mesa, CA is open to new patients as reported by Providence Medical Foundation.

Select Year:

Dr. Denis J. Yoshii, DO

Office Locations

Some issues Dr. Denis J. Yoshii, DO can help you with:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Denis J. Yoshii, DO From 2012 - 2024

Education & Training

Insurance Information

Ratings & Reviews

General Payments

Biography

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