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Home > NV Providers > Pathologists

Dr. Grant Masashi Hayashi, MD

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Specializes in: Pathology

1350 Stardust Street Suite D
Reno, NV 89503

(775) 746-3400

Dr. Grant Masashi Hayashi, MD is a pathologist in Reno, NV specializing in pathology.

Office Locations

1350 Stardust Street Suite D
Reno, NV 89503

(775) 746-3400

(775) 746-3411

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Noteworthy Medicare Patient Procedures Performed by Dr. Grant Masashi Hayashi, MD in 2023

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

Top 5%

By Affordability:

lab tests

special stains

In 2023, Dr. Grant Masashi Hayashi, MD had a list price for lab tests, and special stains that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Nevada. 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 10%

By Affordability:

immunohistochemistry test

In 2023, Dr. Grant Masashi Hayashi, MD had a list price for immunohistochemistry (IHC) test that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Nevada. 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

2012 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2012 were lab tests.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

lab tests	882

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2014 were lab tests.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

lab tests	582

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	625
Female	703

**Ethnicity**
Non-Hispanic White	1177
Black	14
Hispanic	69
Asian	21
Other	30
Native American	17

**Age**
From 65 to 74	821
From 75 to 84	319
85 and over	32
Less than 65	156

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2014

Hypertension	58
High Cholesterol	54
Stroke	3
Ischemic Heart Disease	21
Depression	16
Chronic Kidney Disease	15
Asthma	7
Osteoperosis	5
Atrial Fibrilation	7
Heart Failure	6
Chronic Obstructive Pulmonary Disease	12
Diabetes	21
Dementia	14
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2015 were lab tests.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

lab tests	961

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	2574
Female	2660

**Ethnicity**
Non-Hispanic White	4646
Black	54
Hispanic	258
Asian	88
Other	118
Native American	70

**Age**
From 65 to 74	3178
From 75 to 84	1278
85 and over	150
Less than 65	628

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2015

Hypertension	58
High Cholesterol	57
Stroke	3
Ischemic Heart Disease	22
Depression	18
Chronic Kidney Disease	16
Asthma	11
Osteoperosis	6
Atrial Fibrilation	6
Heart Failure	6
Chronic Obstructive Pulmonary Disease	13
Diabetes	24
Dementia	12
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2016 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

consultation	66
cytology	66
lab tests	311

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	691
Female	836

**Ethnicity**
Non-Hispanic White	935
Black	145
Hispanic	174
Asian	231
Other	0
Native American	0

**Age**
From 65 to 74	732
From 75 to 84	414
85 and over	112
Less than 65	269

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2016

Hypertension	73
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	28
Depression	24
Chronic Kidney Disease	36
Asthma	21
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	37
Dementia	7
Cancer	18

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2017 were lab tests, cytology and consultation.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

consultation	26
cytology	81
lab tests	371

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	682
Female	842

**Ethnicity**
Non-Hispanic White	913
Black	118
Hispanic	167
Asian	271
Other	0
Native American	0

**Age**
From 65 to 74	748
From 75 to 84	426
85 and over	111
Less than 65	239

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2017

Hypertension	72
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	28
Depression	24
Chronic Kidney Disease	36
Asthma	13
Osteoperosis	11
Atrial Fibrilation	8
Heart Failure	16
Chronic Obstructive Pulmonary Disease	16
Diabetes	37
Dementia	8
Cancer	16

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2018 were lab tests and cytology.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

cytology	29
lab tests	167

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	344
Female	385

**Ethnicity**
Non-Hispanic White	452
Black	86
Hispanic	71
Asian	98
Other	0
Native American	0

**Age**
From 65 to 74	372
From 75 to 84	189
85 and over	49
Less than 65	119

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2018

Hypertension	72
High Cholesterol	58
Stroke	4
Ischemic Heart Disease	29
Depression	24
Chronic Kidney Disease	37
Asthma	10
Osteoperosis	11
Atrial Fibrilation	9
Heart Failure	16
Chronic Obstructive Pulmonary Disease	17
Diabetes	37
Dementia	8
Cancer	18

Medicare Procedure and Patient Information

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2020

Hypertension	68
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	50
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. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2021 were cytology.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

cytology	16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	12
Female	19

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

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	13

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2021

Hypertension	68
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	45
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

2022 Medicare Procedure Volume

The top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV during 2022 were cytology and gynecologic pathology.

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

cytology	11
gynecologic pathology	11

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	14

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2022

Hypertension	75
High Cholesterol	68
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

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Grant Masashi Hayashi, MD for Medicare patients.

The highest averages for the top procedures that Dr. Grant Masashi Hayashi, MD treated as a pathologist in Reno, NV were lab tests, consultation, cytology and gynecologic pathology.

consultation	46
cytology	40
gynecologic pathology	11
lab tests	545

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Grant Masashi Hayashi, MD.

**Gender**
Male	547
Female	605

**Ethnicity**
Black / African American	46
Asian / Pacific Islander	78
Non-Hispanic White	904
Native American / Alaskan Native	9
Hispanic	82
Other	16

**Age**
75 to 84	291
85 and over	50
Less than 65	159
65 to 74	650

Average of Total of Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Grant Masashi Hayashi, MD treated were hypertension, high cholesterol, chronic kidney disease and diabetes.

Hypertension	60
High Cholesterol	52
Stroke	2
Ischemic Heart Disease	14
Depression	11
Chronic Kidney Disease	26
Asthma	6
Osteoporosis	4
Heart Failure	7
Chronic Obstructive Pulmonary Disease	8
Diabetes	17
Atrial Fibrillation	4
Dementia	5
Cancer	8

Education & Training

He has a state license in Nevada.

Licensed In: Nevada

Ratings & Reviews

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General Payments

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

**Payments by Company**
Gilead Sciences Inc	$103 Harvoni $103
Genentech USA, Inc.	$100 $100
Relypsa, Inc.	$60 VELTASSA $60

**Types of Payments**
Food and Beverage	$262

Biography

Dr. Grant Hayashi is a pathology specialist in Reno, NV. He graduated from the University of Hawaii at Manoa, John A. Burns School of Medicine.

Select Year:

Dr. Grant Masashi Hayashi, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Grant Masashi Hayashi, MD in 2023

By Affordability:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2018

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Grant Masashi Hayashi, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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