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Dr. Patricia Jean Gillis, MD

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Specializes in: Emergency Medicine

18300 Roscoe Boulevard
Northridge, CA 91328

(818) 885-8500

Dr. Patricia Jean Gillis, MD is an emergency medicine doctor in Northridge, CA specializing in emergency medicine.

Office Locations

18300 Roscoe Boulevard
Northridge, CA 91328

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Noteworthy Medicare Patient Procedures Performed by Dr. Patricia Jean Gillis, MD in 2023

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

Top 5%

By Volume:

lab tests

urinalysis

In 2023, Dr. Patricia Jean Gillis, MD performed more lab tests, and urinalysis procedures for Medicare patients than 95% of providers in related specialties within California.

Top 25%

By Volume:

rapid flu test

By Affordability:

In 2012, among providers in related specialties within California, Dr. Patricia Jean Gillis, MD performed more rapid flu test procedures for Medicare patients than 75% of them and she also had a list price for complete blood count (CBC), influenza tests, rapid flu test, and troponin 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. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2012 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

emergency care	310
thoracic (chest) imaging	88
X-rays	88

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2013 were emergency care, X-rays, thoracic (chest) imaging and pelvic imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

emergency care	397
pelvic imaging	11
thoracic (chest) imaging	146
X-rays	157

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	198
Female	286

**Ethnicity**
Non-Hispanic White	275
Black	17
Hispanic	113
Asian	66
Other	0
Native American	0

**Age**
From 65 to 74	107
From 75 to 84	137
85 and over	130
Less than 65	110

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	12
Ischemic Heart Disease	61
Depression	39
Chronic Kidney Disease	47
Asthma	16
Osteoperosis	19
Atrial Fibrilation	21
Heart Failure	42
Chronic Obstructive Pulmonary Disease	27
Diabetes	45
Dementia	27
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2014 were emergency care, X-rays, thoracic (chest) imaging and pelvic imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

emergency care	326
pelvic imaging	19
thoracic (chest) imaging	136
X-rays	155

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	139
Female	223

**Ethnicity**
Non-Hispanic White	234
Black	21
Hispanic	61
Asian	33
Other	0
Native American	0

**Age**
From 65 to 74	95
From 75 to 84	91
85 and over	86
Less than 65	90

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2014

Hypertension	75
High Cholesterol	69
Stroke	18
Ischemic Heart Disease	64
Depression	41
Chronic Kidney Disease	44
Asthma	15
Osteoperosis	20
Atrial Fibrilation	20
Heart Failure	44
Chronic Obstructive Pulmonary Disease	24
Diabetes	47
Dementia	28
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2015 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

doctor visit	13
emergency care	267
thoracic (chest) imaging	57
X-rays	57

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	290
Female	416

**Ethnicity**
Non-Hispanic White	442
Black	34
Hispanic	130
Asian	78
Other	0
Native American	0

**Age**
From 65 to 74	194
From 75 to 84	198
85 and over	170
Less than 65	144

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2015

Hypertension	75
High Cholesterol	65
Stroke	12
Ischemic Heart Disease	62
Depression	38
Chronic Kidney Disease	52
Asthma	25
Osteoperosis	19
Atrial Fibrilation	18
Heart Failure	49
Chronic Obstructive Pulmonary Disease	26
Diabetes	45
Dementia	29
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2016 were emergency care, lab tests, blood draw and X-rays.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	27
doctor visit	219
emergency care	184
lab tests	122
thoracic (chest) imaging	22
X-rays	22

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	183
Female	257

**Ethnicity**
Non-Hispanic White	332
Black	12
Hispanic	48
Asian	34
Other	14
Native American	0

**Age**
From 65 to 74	185
From 75 to 84	118
85 and over	90
Less than 65	47

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2016

Hypertension	71
High Cholesterol	61
Stroke	10
Ischemic Heart Disease	48
Depression	27
Chronic Kidney Disease	43
Asthma	22
Osteoperosis	16
Atrial Fibrilation	14
Heart Failure	34
Chronic Obstructive Pulmonary Disease	19
Diabetes	35
Dementia	24
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2017 were emergency care, lab tests, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	24
breathing treatment	25
doctor visit	250
emergency care	184
lab tests	151
thoracic (chest) imaging	40
X-rays	40

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	200
Female	264

**Ethnicity**
Non-Hispanic White	370
Black	11
Hispanic	38
Asian	27
Other	18
Native American	0

**Age**
From 65 to 74	185
From 75 to 84	132
85 and over	93
Less than 65	54

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2017

Hypertension	73
High Cholesterol	61
Stroke	10
Ischemic Heart Disease	48
Depression	32
Chronic Kidney Disease	37
Asthma	11
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	33
Chronic Obstructive Pulmonary Disease	19
Diabetes	33
Dementia	22
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2018 were lab tests, emergency care, blood draw and breathing treatment.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	65
breathing treatment	27
doctor visit	312
emergency care	125
lab tests	236

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	183
Female	274

**Ethnicity**
Non-Hispanic White	366
Black	0
Hispanic	42
Asian	29
Other	0
Native American	0

**Age**
From 65 to 74	193
From 75 to 84	157
85 and over	69
Less than 65	38

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2018

Hypertension	70
High Cholesterol	67
Stroke	7
Ischemic Heart Disease	45
Depression	30
Chronic Kidney Disease	36
Asthma	13
Osteoperosis	16
Atrial Fibrilation	16
Heart Failure	28
Chronic Obstructive Pulmonary Disease	17
Diabetes	30
Dementia	15
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2019 were lab tests, blood draw, emergency care and breathing treatment.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	79
breathing treatment	21
doctor visit	452
emergency care	55
lab tests	325

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	195
Female	308

**Ethnicity**
Non-Hispanic White	411
Black	0
Hispanic	40
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	220
From 75 to 84	184
85 and over	64
Less than 65	35

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2019

Hypertension	66
High Cholesterol	60
Stroke	8
Ischemic Heart Disease	39
Depression	24
Chronic Kidney Disease	26
Asthma	11
Osteoperosis	17
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Dementia	16
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2020 were lab tests, blood draw and emergency care.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	47
doctor visit	499
emergency care	13
lab tests	156

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	198
Female	294

**Ethnicity**
Non-Hispanic White	413
Black	0
Hispanic	32
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	257
From 75 to 84	148
85 and over	50
Less than 65	37

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2020

Hypertension	60
High Cholesterol	60
Stroke	5
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	24
Asthma	12
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	25
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2021 were lab tests and blood draw.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	37
doctor visit	816
lab tests	119

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	328
Female	398

**Ethnicity**
Non-Hispanic White	620
Black	0
Hispanic	36
Asian	0
Other	39
Native American	0

**Age**
From 65 to 74	410
From 75 to 84	218
85 and over	53
Less than 65	45

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2021

Hypertension	58
High Cholesterol	65
Stroke	3
Ischemic Heart Disease	32
Depression	21
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	13
Atrial Fibrilation	7
Heart Failure	13
Chronic Obstructive Pulmonary Disease	7
Diabetes	23
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2022 were lab tests, blood draw, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	38
doctor visit	5369
lab tests	216
musculoskeletal imaging	11
X-rays	11

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	1650
Female	2095

**Ethnicity**
Non-Hispanic White	3009
Black	0
Hispanic	249
Asian	232
Other	198
Native American	0

**Age**
From 65 to 74	1854
From 75 to 84	1367
85 and over	355
Less than 65	169

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2022

Hypertension	69
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	32
Depression	19
Chronic Kidney Disease	18
Asthma	11
Osteoperosis	19
Atrial Fibrilation	15
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	28
Dementia	4
Cancer	18

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA during 2023 were lab tests and blood draw.

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

blood draw	41
doctor visit	1496
lab tests	287

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Male	548
Female	775

**Ethnicity**
Non-Hispanic White	1073
Black	20
Hispanic	92
Asian	72
Other	66
Native American	0

**Age**
From 65 to 74	611
From 75 to 84	513
85 and over	125
Less than 65	74

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2023

Hypertension	69
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	33
Depression	21
Chronic Kidney Disease	19
Asthma	14
Osteoperosis	22
Atrial Fibrilation	17
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	29
Dementia	5
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Patricia Jean Gillis, MD for Medicare patients.

The highest averages for the top procedures that Dr. Patricia Jean Gillis, MD treated as an emergency medicine doctor in Northridge, CA were emergency care, lab tests, thoracic (chest) imaging and X-rays.

blood draw	44
doctor visit	1047
emergency care	206
lab tests	201
musculoskeletal imaging	11
pelvic imaging	15
thoracic (chest) imaging	81
X-rays	75

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Patricia Jean Gillis, MD.

**Gender**
Female	465
Male	342

**Ethnicity**
Black / African American	9
Asian / Pacific Islander	51
Non-Hispanic White	628
Hispanic	73
Native American / Alaskan Native	0
Other	27

**Age**
85 and over	107
75 to 84	271
Less than 65	70
65 to 74	359

Average of Total of Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD From 2012 - 2023

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

Hypertension	63
High Cholesterol	60
Stroke	8
Ischemic Heart Disease	41
Depression	26
Chronic Kidney Disease	30
Asthma	13
Osteoporosis	15
Heart Failure	25
Chronic Obstructive Pulmonary Disease	15
Diabetes	30
Atrial Fibrillation	13
Dementia	15
Cancer	11

Education & Training

She has a state license in California.

Licensed In: California

Ratings & Reviews

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General Payments

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

**Payments by Company**
Gilead Sciences, Inc.	$120 Truvada $120
Galderma Laboratories, L.P.	$19 $19
Genentech USA, Inc.	$13 Xofluza $13

**Types of Payments**
Food and Beverage	$153

Biography

Dr. Patricia Gillis specializes in emergency medicine and practices in Northridge, CA. She studied medicine at Loma Linda University School of Medicine.

Select Year:

Dr. Patricia Jean Gillis, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Patricia Jean Gillis, MD in 2023

By Volume:

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. Patricia Jean Gillis, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Patricia Jean Gillis, MD From 2012 - 2023

Education & Training

Ratings & Reviews

General Payments

Biography

Other Providers in Northridge, CA