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Home > CA Providers > Internists & Internal Medicine Doctors

Dr. Maria Isabel Bacay, MD

Accepting New Patients

(5 Ratings)

Specializes in: Internal Medicine (Adult Medicine)

University of Santo Tomas Faculty of Medicine and Surgery

1140 Norman Drive Suite 103
Manteca, CA 95336

(209) 825-6331

Dr. Maria Isabel Bacay, MD is an internist in Manteca, CA specializing in internal medicine (adult medicine). She graduated from University of Santo Tomas Faculty of Medicine and Surgery. Dr. Maria Isabel Bacay, MD is affiliated with Hill Physicians.

Office Locations

1140 Norman Drive Suite 103
Manteca, CA 95336

(209) 825-6331

open_in_new

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2012 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

diabetes management	20
doctor visit	1249
ear procedures	21
hospital care	519
inpatient care	519
lab tests	38
preventive care	113
removal of lesion (e.g. growth)	16
skin procedures	16
vaccines	93

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2013 were hospital care, inpatient care, preventive care and lab tests.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

diabetes management	32
doctor visit	1173
ear procedures	30
hospital care	399
inpatient care	399
lab tests	55
preventive care	71
removal of lesion (e.g. growth)	14
skin procedures	14
vaccines	39

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	76
Female	323

**Ethnicity**
Non-Hispanic White	309
Black	0
Hispanic	58
Asian	18
Other	0
Native American	0

**Age**
From 65 to 74	151
From 75 to 84	135
85 and over	89
Less than 65	24

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2013

Hypertension	75
High Cholesterol	58
Stroke	6
Ischemic Heart Disease	41
Depression	21
Chronic Kidney Disease	19
Asthma	10
Osteoperosis	15
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	18
Diabetes	32
Dementia	15
Cancer	8

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2014 were preventive care, vaccines, lab tests and diabetes management.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

diabetes management	25
doctor visit	1251
ear procedures	15
lab tests	44
preventive care	91
vaccines	66

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	52
Female	339

**Ethnicity**
Non-Hispanic White	307
Black	0
Hispanic	59
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	131
85 and over	78
Less than 65	22

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2014

Hypertension	70
High Cholesterol	53
Stroke	4
Ischemic Heart Disease	36
Depression	21
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	12
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	16
Diabetes	29
Dementia	14
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2015 were preventive care, vaccines, lab tests and chronic care.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

breast exam	11
chronic care	32
cytology	11
diabetes management	25
doctor visit	1148
gynecologic pathology	11
gynecologic procedures	11
lab tests	52
preventive care	95
removal of lesion (e.g. growth)	12
skin procedures	12
vaccines	59

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	104
Female	640

**Ethnicity**
Non-Hispanic White	574
Black	0
Hispanic	120
Asian	28
Other	0
Native American	0

**Age**
From 65 to 74	294
From 75 to 84	276
85 and over	146
Less than 65	28

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2015

Hypertension	74
High Cholesterol	57
Stroke	6
Ischemic Heart Disease	35
Depression	20
Chronic Kidney Disease	22
Asthma	11
Osteoperosis	13
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	16
Diabetes	28
Dementia	14
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2016 were preventive care, lab tests, diabetes management and vaccines.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

chronic care	14
diabetes management	21
doctor visit	835
lab tests	37
preventive care	39
vaccines	18

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	44
Female	287

**Ethnicity**
Non-Hispanic White	255
Black	0
Hispanic	50
Asian	14
Other	0
Native American	0

**Age**
From 65 to 74	119
From 75 to 84	134
85 and over	65
Less than 65	13

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2016

Hypertension	73
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	35
Depression	23
Chronic Kidney Disease	27
Asthma	19
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	18
Chronic Obstructive Pulmonary Disease	16
Diabetes	30
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2017 were lab tests, chronic care, preventive care and diabetes management.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

chronic care	40
diabetes management	19
doctor visit	938
ear procedures	15
lab tests	43
preventive care	36
vaccines	17

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	42
Female	275

**Ethnicity**
Non-Hispanic White	238
Black	0
Hispanic	49
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	116
From 75 to 84	122
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2017

Hypertension	73
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	34
Depression	18
Chronic Kidney Disease	29
Asthma	4
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	17
Chronic Obstructive Pulmonary Disease	14
Diabetes	35
Dementia	17
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2018 were preventive care, vaccines, lab tests and chronic care.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

chronic care	30
diabetes management	25
doctor visit	1178
ear procedures	22
lab tests	50
preventive care	155
vaccines	130

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	40
Female	284

**Ethnicity**
Non-Hispanic White	243
Black	0
Hispanic	49
Asian	0
Other	15
Native American	0

**Age**
From 65 to 74	132
From 75 to 84	127
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2018

Hypertension	74
High Cholesterol	60
Stroke	5
Ischemic Heart Disease	35
Depression	20
Chronic Kidney Disease	27
Asthma	4
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	35
Dementia	15
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2019 were lab tests, chronic care, preventive care and vaccines.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

chronic care	68
diabetes management	21
doctor visit	1241
ear procedures	20
lab tests	83
preventive care	52
vaccines	31

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	40
Female	317

**Ethnicity**
Non-Hispanic White	274
Black	0
Hispanic	55
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	144
From 75 to 84	146
85 and over	54
Less than 65	13

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2019

Hypertension	75
High Cholesterol	59
Stroke	5
Ischemic Heart Disease	34
Depression	19
Chronic Kidney Disease	27
Asthma	5
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2020 were lab tests, preventive care, vaccines and chronic care.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

chronic care	38
diabetes management	31
doctor visit	812
ear procedures	11
electroencephalography (EEG)	22
evoked potential test	22
lab tests	88
preventive care	75
vaccines	44

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	31
Female	286

**Ethnicity**
Non-Hispanic White	237
Black	0
Hispanic	55
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	119
From 75 to 84	137
85 and over	50
Less than 65	11

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2020

Hypertension	75
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	37
Depression	23
Chronic Kidney Disease	30
Asthma	4
Osteoperosis	11
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	13
Diabetes	29
Dementia	13
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2021 were lab tests, preventive care and vaccines.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

doctor visit	709
lab tests	28
preventive care	14
vaccines	14

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	40
Female	276

**Ethnicity**
Non-Hispanic White	243
Black	0
Hispanic	47
Asian	0
Other	14
Native American	0

**Age**
From 65 to 74	106
From 75 to 84	146
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	5
Ischemic Heart Disease	35
Depression	22
Chronic Kidney Disease	27
Asthma	4
Osteoperosis	13
Atrial Fibrilation	14
Heart Failure	18
Chronic Obstructive Pulmonary Disease	10
Diabetes	28
Dementia	11
Cancer	7

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2022 were lab tests.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

doctor visit	770
lab tests	47

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	34
Female	255

**Ethnicity**
Non-Hispanic White	223
Black	0
Hispanic	43
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	83
From 75 to 84	138
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	35
Depression	23
Chronic Kidney Disease	26
Asthma	10
Osteoperosis	21
Atrial Fibrilation	19
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	31
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2023 were lab tests.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

doctor visit	636
lab tests	16

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	36
Female	204

**Ethnicity**
Non-Hispanic White	190
Black	0
Hispanic	32
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	119
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	36
Depression	19
Chronic Kidney Disease	30
Asthma	12
Osteoperosis	18
Atrial Fibrilation	19
Heart Failure	19
Chronic Obstructive Pulmonary Disease	16
Diabetes	31
Dementia	8
Cancer	14

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA during 2024 were lab tests.

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

doctor visit	667
lab tests	36

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	29
Female	200

**Ethnicity**
Non-Hispanic White	174
Black	0
Hispanic	36
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	107
85 and over	61
Less than 65	0

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	35
Depression	17
Chronic Kidney Disease	33
Asthma	12
Osteoperosis	20
Atrial Fibrilation	23
Heart Failure	19
Chronic Obstructive Pulmonary Disease	13
Diabetes	33
Dementia	10
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Maria Isabel Bacay, MD for Medicare patients.

The highest averages for the top procedures that Dr. Maria Isabel Bacay, MD treated as an internist in Manteca, CA were inpatient care, hospital care, preventive care and vaccines.

breast exam	11
chronic care	37
cytology	11
diabetes management	24
doctor visit	969
ear procedures	19
electroencephalography (EEG)	22
evoked potential test	22
gynecologic pathology	11
gynecologic procedures	11
hospital care	459
inpatient care	459
lab tests	47
preventive care	74
removal of lesion (e.g. growth)	14
skin procedures	14
vaccines	51

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Maria Isabel Bacay, MD.

**Gender**
Male	43
Female	283

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	6
Non-Hispanic White	251
Native American / Alaskan Native	0
Hispanic	50
Other	5

**Age**
75 to 84	132
85 and over	41
Less than 65	8
65 to 74	114

Average of Total of Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Maria Isabel Bacay, MD treated were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	68
High Cholesterol	58
Stroke	6
Ischemic Heart Disease	32
Depression	18
Chronic Kidney Disease	24
Asthma	7
Osteoporosis	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Atrial Fibrillation	13
Dementia	11
Cancer	8

Education & Training

Dr. Maria Isabel Bacay, MD graduated from University of Santo Tomas Faculty of Medicine and Surgery. She has a state license in California.

Medical School: University of Santo Tomas Faculty of Medicine and Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Maria Isabel Bacay, MD is associated with these hospitals and organizations:

Hill Physicians

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. Maria Isabel Bacay, MD appears to accept the following insurance providers: Cigna, Aetna, Blue Shield of California, SCAN Health Plan, Anthem, UnitedHealthcare, Health Net, Humana, Hill Physicians Care Solutions and Central Health Plan.

Insurance Accepted by Provider includes:

According to our sources, Dr. Maria Isabel Bacay, MD accepts the following insurance providers:

Cigna

Aetna

Blue Shield of California

SCAN Health Plan

Anthem

UnitedHealthcare

Health Net

Humana

Hill Physicians Care Solutions

Central Health Plan

Ratings & Reviews

Dr. Maria Isabel Bacay, MD has a high overall rating with an average of 3.8 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Maria Isabel Bacay, MD from all over the web to help you find the right in Manteca, CA.

3.8

Overall Rating

(5 Ratings)

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General Payments

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

**Payments by Company**
AstraZeneca Pharmaceuticals LP	$4,183 FARXIGA $2,010	BYDUREON $798	SYMBICORT $258	AIRSUPRA $216	BYDUREON PEN $207	Other $693
Novo Nordisk Inc	$4,041 Ozempic $1,121	Tresiba $1,054	Victoza $669	RYBELSUS $484	Xultophy 100/3.6 $224	Other $487
Janssen Pharmaceuticals, Inc	$4,024 XARELTO $2,479	INVOKANA $1,249	Nucynta $110	meters $66	INVOKAMET $39	Other $81
Boehringer Ingelheim Pharmaceuticals, Inc.	$2,604 JARDIANCE $1,117	GLYXAMBI $235	STIOLTO $214	SPIRIVA RESPIMAT $147	Pradaxa $113	Other $777
SANOFI-AVENTIS U.S. LLC	$1,735 TOUJEO $699	PRALUENT $320	LANTUS $268	SOLIQUA 100/33 $261	SOLIQUA $60	Other $127
Other	$14,879 ELIQUIS $907	TRELEGY ELLIPTA $655	Repatha $569	ENTRESTO $517	Vascepa $514	Other $11,717

**Types of Payments**
Food and Beverage	$30,987
Education	$479

Biography

Dr. Maria Bacay is rated highly by her patients. Dr. Bacay is in-network for several insurance carriers, including Blue Shield, Anthem, and Health Net. She studied medicine at the University of Santo Tomas Faculty of Medicine and Surgery. She is affiliated with Hill Physicians. Her practice in Manteca, CA is open to new patients as reported by Hill Physicians.

Select Year:

Dr. Maria Isabel Bacay, MD

Office Locations

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. Maria Isabel Bacay, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Maria Isabel Bacay, MD 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. Maria Isabel Bacay, MD From 2012 - 2024

Education & Training

Affiliations & Hospitals

Insurance Information

Ratings & Reviews

General Payments

Biography

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