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Home > CA Providers > Family Physicians & Family Medicine Specialists

Dr. Jonathan A. Rosaasen, MD

Accepting New Patients

(Dr. Jonathan Rosaasen, MD)

(7 Ratings)

Specializes in: Family Medicine

Loma Linda University School of Medicine (2002)

187 East Wilbur Road Suite 100
Thousand Oaks, CA 91360

(805) 492-1804

Dr. Jonathan A. Rosaasen, MD is a family medicine practitioner in Thousand Oaks, CA specializing in family medicine. He graduated from Loma Linda University School of Medicine in 2002 and has 24 years of experience.

Office Locations

187 East Wilbur Road Suite 100
Thousand Oaks, CA 91360

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Noteworthy Medicare Patient Procedures Performed by Dr. Jonathan A. Rosaasen, MD in 2023

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

Top 25%

By Volume:

blood draw

phlebotomy for lab tests

By Affordability:

blood draw

blood draw for lab tests

phlebotomy for lab tests

venipuncture

In 2012, among providers in related specialties within California, Dr. Jonathan A. Rosaasen, MD performed more blood draw, and phlebotomy for lab tests procedures for Medicare patients than 75% of them and he also had a list price for blood draw, blood draw for lab tests, phlebotomy for lab tests, and venipuncture (phlebotomy) 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. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2012 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	31
doctor visit	254
preventive care	25
vaccines	25

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2013 were blood draw, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	42
doctor visit	221
lab tests	14
preventive care	15
vaccines	15

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	50
Female	58

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	22
85 and over	13
Less than 65	12

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2013

Hypertension	53
High Cholesterol	30
Stroke	0
Ischemic Heart Disease	26
Depression	21
Chronic Kidney Disease	10
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	31
Dementia	10
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2014 were blood draw, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	119
doctor visit	792
lab tests	16
preventive care	35
vaccines	35

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	111
Female	128

**Ethnicity**
Non-Hispanic White	205
Black	0
Hispanic	16
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	123
From 75 to 84	57
85 and over	33
Less than 65	26

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2014

Hypertension	51
High Cholesterol	32
Stroke	0
Ischemic Heart Disease	26
Depression	18
Chronic Kidney Disease	13
Asthma	6
Osteoperosis	5
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	7
Diabetes	26
Dementia	12
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2015 were pain management, injections, blood draw and preventive care.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	110
doctor visit	848
injections	122
lab tests	17
pain management	122
preventive care	32
vaccines	32

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	240
Female	282

**Ethnicity**
Non-Hispanic White	450
Black	0
Hispanic	34
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	282
From 75 to 84	140
85 and over	48
Less than 65	52

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2015

Hypertension	47
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	24
Depression	18
Chronic Kidney Disease	14
Asthma	7
Osteoperosis	7
Atrial Fibrilation	7
Heart Failure	13
Chronic Obstructive Pulmonary Disease	7
Diabetes	25
Dementia	8
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2016 were injections, pain management, blood draw and aspiration.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

aspiration	73
blood draw	130
doctor visit	1107
injections	719
lab tests	29
pain management	646
preventive care	65
vaccines	65

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	142
Female	186

**Ethnicity**
Non-Hispanic White	276
Black	0
Hispanic	26
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	183
From 75 to 84	90
85 and over	24
Less than 65	31

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2016

Hypertension	46
High Cholesterol	37
Stroke	4
Ischemic Heart Disease	24
Depression	18
Chronic Kidney Disease	15
Asthma	12
Osteoperosis	7
Atrial Fibrilation	5
Heart Failure	12
Chronic Obstructive Pulmonary Disease	8
Diabetes	25
Dementia	5
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2017 were blood draw, preventive care, vaccines and pain management.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	209
doctor visit	1091
injections	31
lab tests	22
pain management	31
preventive care	94
vaccines	94

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	163
Female	192

**Ethnicity**
Non-Hispanic White	289
Black	0
Hispanic	31
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	196
From 75 to 84	93
85 and over	34
Less than 65	32

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2017

Hypertension	50
High Cholesterol	36
Stroke	4
Ischemic Heart Disease	25
Depression	17
Chronic Kidney Disease	17
Asthma	5
Osteoperosis	6
Atrial Fibrilation	6
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	24
Dementia	6
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2018 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	231
doctor visit	904
preventive care	91
vaccines	91

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	158
Female	179

**Ethnicity**
Non-Hispanic White	273
Black	0
Hispanic	32
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	184
From 75 to 84	84
85 and over	31
Less than 65	38

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2018

Hypertension	51
High Cholesterol	47
Stroke	4
Ischemic Heart Disease	25
Depression	21
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	27
Dementia	7
Cancer	7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2019 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	183
doctor visit	712
preventive care	86
vaccines	75

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	83
Female	128

**Ethnicity**
Non-Hispanic White	168
Black	0
Hispanic	25
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	121
From 75 to 84	54
85 and over	21
Less than 65	15

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2019

Hypertension	57
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	25
Depression	16
Chronic Kidney Disease	16
Asthma	8
Osteoperosis	7
Atrial Fibrilation	7
Heart Failure	9
Chronic Obstructive Pulmonary Disease	6
Diabetes	24
Dementia	7
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2020 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	126
doctor visit	495
preventive care	44
vaccines	44

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	84
Female	121

**Ethnicity**
Non-Hispanic White	161
Black	0
Hispanic	26
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	44
85 and over	15
Less than 65	19

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2020

Hypertension	55
High Cholesterol	41
Stroke	0
Ischemic Heart Disease	20
Depression	18
Chronic Kidney Disease	19
Asthma	0
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	6
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2021 were blood draw, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	148
doctor visit	471
lab tests	19
preventive care	33
vaccines	33

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	77
Female	115

**Ethnicity**
Non-Hispanic White	160
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	109
From 75 to 84	49
85 and over	16
Less than 65	18

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2021

Hypertension	48
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	21
Depression	15
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	9
Atrial Fibrilation	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	7
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA during 2022 were blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

blood draw	156
doctor visit	577
preventive care	35
vaccines	35

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	82
Female	110

**Ethnicity**
Non-Hispanic White	162
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	99
From 75 to 84	65
85 and over	17
Less than 65	11

Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD in 2022

Hypertension	66
High Cholesterol	55
Stroke	7
Ischemic Heart Disease	17
Depression	15
Chronic Kidney Disease	12
Asthma	7
Osteoperosis	14
Atrial Fibrilation	8
Heart Failure	9
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Jonathan A. Rosaasen, MD for Medicare patients.

The highest averages for the top procedures that Dr. Jonathan A. Rosaasen, MD treated as a family medicine practitioner in Thousand Oaks, CA were injections, pain management, blood draw and aspiration.

aspiration	73
blood draw	135
doctor visit	679
injections	290
lab tests	19
pain management	266
preventive care	50
vaccines	49

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Jonathan A. Rosaasen, MD.

**Gender**
Male	108
Female	136

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	3
Non-Hispanic White	202
Native American / Alaskan Native	0
Hispanic	20
Other	1

**Age**
75 to 84	63
85 and over	22
Less than 65	23
65 to 74	135

Average of Total of Conditions of Medicare patients treated by Dr. Jonathan A. Rosaasen, MD From 2012 - 2022

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

Hypertension	47
High Cholesterol	36
Stroke	1
Ischemic Heart Disease	21
Depression	16
Chronic Kidney Disease	14
Asthma	5
Osteoporosis	6
Heart Failure	8
Chronic Obstructive Pulmonary Disease	4
Diabetes	22
Atrial Fibrillation	5
Dementia	6
Cancer	6

Education & Training

Dr. Jonathan A. Rosaasen, MD graduated from Loma Linda University School of Medicine in 2002. He completed residency at Kaiser Permanente Riverside Medical Center. He is certified by the American Board of Family Medicine and has a state license in California.

Medical School: Loma Linda University School of Medicine (2002)

Residency: Kaiser Permanente Riverside Medical Center (2005)

Board Certification: American Board of Family Medicine

Licensed In: California

Ratings & Reviews

Dr. Jonathan A. Rosaasen, MD has a high overall rating with an average of 4.29 out of 5 stars based on 7 ratings. We collect ratings and reviews of Dr. Jonathan A. Rosaasen, MD from all over the web to help you find the right in Thousand Oaks, CA.

4.29

Overall Rating

(7 Ratings)

Leave a Review

Reviews Left On DocSpot

Overall Rating: 5.0 2021-07-08

Fantastic physician who cares about his patients and takes the time to hear their issues.

General Payments

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

**Payments by Company**
AbbVie Inc.	$1,259 QULIPTA $549	VRAYLAR $386	UBRELVY $246	$78
Amgen Inc.	$1,131 Repatha $950	Otezla $107	Aimovig $73
Lilly USA, LLC	$947 JARDIANCE $268	REYVOW $249	MOUNJARO $192	EMGALITY $132	BASAGLAR $79	Other $27
Novo Nordisk Inc	$823 RYBELSUS $290	Saxenda $230	Ozempic $179	Wegovy $47	Victoza $14	Other $64
Boehringer Ingelheim Pharmaceuticals, Inc.	$349 JARDIANCE $178	SYNJARDY $65	GLYXAMBI $62	TRIJARDY XR $44
Other	$3,488 Contrave $330	AJOVY $175	FARXIGA $166	Freestyle Libre 2 $158	QUVIVIQ $143	Other $2,516

**Types of Payments**
Food and Beverage	$7,949
Education	$48

Biography

Dr. Jonathan Rosaasen specializes in family medicine and practices in Thousand Oaks, CA and Moorpark, CA. Dr. Rosaasen's average patient rating is 4.5 stars (out of 5). He attended medical school at Loma Linda University School of Medicine. For his residency, Dr. Rosaasen trained at Kaiser Permanente Riverside Medical Center. Dr. Rosaasen welcomes new patients at his office inThousand Oaks, CA as reported by Yext.