In 2023, Dr. Andrew C. Johnston, MD had a list price for A1C test, diabetes screening, and glycated protein test that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Volume:

A1C test

lab tests

preventive care

By Affordability:

prothrombin time test

In 2012, among providers in related specialties within California, Dr. Andrew C. Johnston, MD performed more A1C test, lab tests, and preventive care procedures for Medicare patients than 75% of them and he also had a list price for blood tests, coagulation (blood clotting) tests, diabetes management, liver function tests (LFTs), and prothrombin time (PT) test that was lower than the list prices billed to Medicare by 75% 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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2012 were preventive care, vaccines, lab tests and ear procedures.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

breast exam	12
doctor visit	2227
ear procedures	14
gynecologic procedures	12
lab tests	24
preventive care	213
vaccines	213

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2013 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

doctor visit	2191
lab tests	27
preventive care	225
vaccines	214

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	389
Female	373

**Ethnicity**
Non-Hispanic White	705
Black	0
Hispanic	21
Asian	20
Other	0
Native American	0

**Age**
From 65 to 74	336
From 75 to 84	254
85 and over	138
Less than 65	34

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2013

Hypertension	58
High Cholesterol	53
Stroke	4
Ischemic Heart Disease	27
Depression	19
Chronic Kidney Disease	18
Asthma	6
Osteoperosis	7
Atrial Fibrilation	12
Heart Failure	8
Chronic Obstructive Pulmonary Disease	9
Diabetes	18
Dementia	10
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2014 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

doctor visit	1891
lab tests	14
preventive care	123
vaccines	123

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	397
Female	365

**Ethnicity**
Non-Hispanic White	700
Black	0
Hispanic	19
Asian	18
Other	0
Native American	0

**Age**
From 65 to 74	344
From 75 to 84	242
85 and over	142
Less than 65	34

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2014

Hypertension	63
High Cholesterol	60
Stroke	6
Ischemic Heart Disease	27
Depression	22
Chronic Kidney Disease	19
Asthma	7
Osteoperosis	7
Atrial Fibrilation	14
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	17
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2015 were lab tests, preventive care and breathing treatment.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

breathing treatment	13
lab tests	55
preventive care	33

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	50
Female	106

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

**Age**
From 65 to 74	58
From 75 to 84	0
85 and over	0
Less than 65	54

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2015

Hypertension	75
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	33
Depression	41
Chronic Kidney Disease	35
Asthma	19
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	14
Diabetes	67
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2016 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	13
lab tests	42
preventive care	28

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	21
Female	30

**Age**
From 65 to 74	26
From 75 to 84	0
85 and over	0
Less than 65	14

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	0
Ischemic Heart Disease	31
Depression	27
Chronic Kidney Disease	55
Asthma	24
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	0
Diabetes	75
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2017 were lab tests and preventive care.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

lab tests	13
preventive care	13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	19
Female	24

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	32
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	21
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2017

Hypertension	75
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	49
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	67
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2018 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	11
lab tests	11
preventive care	11

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	17
Female	17

**Age**
From 65 to 74	20
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2018

Hypertension	75
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	32
Depression	0
Chronic Kidney Disease	56
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	75
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2019 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	13
lab tests	13
preventive care	13

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	19
Female	29

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	37
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	21
From 75 to 84	13
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2019

Hypertension	75
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	29
Depression	23
Chronic Kidney Disease	58
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	31
Chronic Obstructive Pulmonary Disease	0
Diabetes	75
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2020 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	28
lab tests	28
preventive care	28

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	22
Female	33

**Age**
From 65 to 74	27
From 75 to 84	15
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2020

Hypertension	69
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	33
Depression	27
Chronic Kidney Disease	49
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	24
Chronic Obstructive Pulmonary Disease	22
Diabetes	49
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2021 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	55
lab tests	142
preventive care	55

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	71
Female	73

**Age**
From 65 to 74	68
From 75 to 84	45
85 and over	12
Less than 65	19

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2021

Hypertension	63
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	28
Depression	25
Chronic Kidney Disease	38
Asthma	0
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	46
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA during 2022 were lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

diabetes management	121
lab tests	206
preventive care	121

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	84
Female	86

**Ethnicity**
Non-Hispanic White	156
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	80
From 75 to 84	50
85 and over	18
Less than 65	22

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2022

Hypertension	75
High Cholesterol	66
Stroke	0
Ischemic Heart Disease	20
Depression	22
Chronic Kidney Disease	32
Asthma	9
Osteoperosis	19
Atrial Fibrilation	21
Heart Failure	16
Chronic Obstructive Pulmonary Disease	19
Diabetes	60
Dementia	0
Cancer	8

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Andrew C. Johnston, MD for Medicare patients.

The highest averages for the top procedures that Dr. Andrew C. Johnston, MD treated as an internist in Carmel, CA were vaccines, preventive care, lab tests and diabetes management.

breast exam	12
diabetes management	40
doctor visit	2103
ear procedures	14
gynecologic procedures	12
lab tests	52
preventive care	78
vaccines	183

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Andrew C. Johnston, MD.

**Gender**
Male	99
Female	103

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	3
Non-Hispanic White	141
Native American / Alaskan Native	0
Hispanic	20
Other	0

**Age**
75 to 84	56
85 and over	28
Less than 65	16
65 to 74	91

Average of Total of Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD From 2012 - 2022

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

Hypertension	63
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	23
Depression	18
Chronic Kidney Disease	37
Asthma	5
Osteoporosis	3
Heart Failure	13
Chronic Obstructive Pulmonary Disease	7
Diabetes	49
Atrial Fibrillation	5
Dementia	2
Cancer	2

Education & Training

He has a state license in Arizona.

Licensed In: Arizona

Ratings & Reviews

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General Payments

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

**Payments by Company**
GlaxoSmithKline, LLC.	$144 BREO ELLIPTA $115	FLUARIX QUADRIVALENT $21	ANORO $8
SANOFI-AVENTIS U.S. LLC	$125 SOLIQUA 100/33 $125
Janssen Pharmaceuticals, Inc	$114 INVOKANA $114
Lilly USA, LLC	$38 JARDIANCE $20	TRULICITY $18
Amgen Inc.	$21 Prolia $21
Other	$42 Brovana $20	FARXIGA $12	Uloric $10

**Types of Payments**
Food and Beverage	$445
Education	$40

Biography

Dr. Andrew Johnston has obtained a license to practice in Arizona.

Select Year:

Dr. Andrew C. Johnston, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Andrew C. Johnston, MD in 2023

By Affordability:

By Volume:

By Affordability:

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. Andrew C. Johnston, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Andrew C. Johnston, 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. Andrew C. Johnston, MD From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in Carmel, CA