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Home > CA Providers > Neurologists

Dr. Karen Phyllis Frei, MD

(292 Ratings)

Specializes in: Neurology (Brain & Spinal Cord Disease)

Thomas Jefferson University, Jefferson Medical College

Professional interests include: movement disorders, incobotulinumtoxinA (Xeomin), onabotulinumtoxinA (Botox, Botox Cosmetic)

11234 Anderson Street
Loma Linda, CA 92354

(909) 558-2880

Dr. Karen Phyllis Frei, MD is a neurologist in Loma Linda, CA specializing in neurology (brain & spinal cord disease). She graduated from Thomas Jefferson University, Jefferson Medical College. Dr. Karen Phyllis Frei, MD is affiliated with Loma Linda University Health.

Office Locations

11234 Anderson Street
Loma Linda, CA 92354

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11370 Anderson Street Suite B100
Loma Linda, CA 92354

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25333 Barton Road
Loma Linda, CA 92354

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	338

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2013 were hospital care, inpatient care, minimally invasive procedures and injections.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	526
hospital care	49
injections	36
inpatient care	49
minimally invasive procedures	36

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	162
Female	185

**Ethnicity**
Non-Hispanic White	240
Black	0
Hispanic	57
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	131
From 75 to 84	101
85 and over	42
Less than 65	73

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2013

Hypertension	61
High Cholesterol	51
Stroke	14
Ischemic Heart Disease	34
Depression	34
Chronic Kidney Disease	26
Asthma	12
Osteoperosis	12
Atrial Fibrilation	9
Heart Failure	22
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	25
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2014 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	717
hospital care	43
inpatient care	43

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	154
Female	186

**Ethnicity**
Non-Hispanic White	212
Black	24
Hispanic	72
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	134
From 75 to 84	91
85 and over	37
Less than 65	78

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2014

Hypertension	64
High Cholesterol	51
Stroke	13
Ischemic Heart Disease	36
Depression	36
Chronic Kidney Disease	32
Asthma	10
Osteoperosis	14
Atrial Fibrilation	9
Heart Failure	29
Chronic Obstructive Pulmonary Disease	11
Diabetes	37
Dementia	25
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2015 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	784
hospital care	60
inpatient care	60

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	344
Female	430

**Ethnicity**
Non-Hispanic White	556
Black	42
Hispanic	134
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	298
From 75 to 84	228
85 and over	70
Less than 65	178

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2015

Hypertension	65
High Cholesterol	48
Stroke	11
Ischemic Heart Disease	32
Depression	34
Chronic Kidney Disease	26
Asthma	13
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	24
Chronic Obstructive Pulmonary Disease	11
Diabetes	30
Dementia	25
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2016 were hospital care, inpatient care, minimally invasive procedures and injections.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	719
hospital care	29
injections	17
inpatient care	29
minimally invasive procedures	17

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	172
Female	199

**Ethnicity**
Non-Hispanic White	257
Black	25
Hispanic	66
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	106
85 and over	35
Less than 65	95

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2016

Hypertension	63
High Cholesterol	48
Stroke	9
Ischemic Heart Disease	30
Depression	39
Chronic Kidney Disease	29
Asthma	18
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	24
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	25
Cancer	6

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2017 were minimally invasive procedures, injections, hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	670
hospital care	48
injections	73
inpatient care	48
minimally invasive procedures	73

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	170
Female	206

**Ethnicity**
Non-Hispanic White	267
Black	26
Hispanic	59
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	144
From 75 to 84	95
85 and over	38
Less than 65	99

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2017

Hypertension	62
High Cholesterol	41
Stroke	7
Ischemic Heart Disease	30
Depression	37
Chronic Kidney Disease	34
Asthma	10
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	25
Chronic Obstructive Pulmonary Disease	12
Diabetes	31
Dementia	25
Cancer	7

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2018 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	670
hospital care	44
inpatient care	44

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	159
Female	199

**Ethnicity**
Non-Hispanic White	237
Black	28
Hispanic	75
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	170
From 75 to 84	81
85 and over	32
Less than 65	75

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2018

Hypertension	65
High Cholesterol	48
Stroke	9
Ischemic Heart Disease	35
Depression	40
Chronic Kidney Disease	36
Asthma	11
Osteoperosis	12
Atrial Fibrilation	9
Heart Failure	26
Chronic Obstructive Pulmonary Disease	14
Diabetes	34
Dementia	27
Cancer	6

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2019 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	626
hospital care	66
inpatient care	66

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	156
Female	192

**Ethnicity**
Non-Hispanic White	229
Black	28
Hispanic	70
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	160
From 75 to 84	97
85 and over	30
Less than 65	61

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2019

Hypertension	65
High Cholesterol	51
Stroke	11
Ischemic Heart Disease	37
Depression	39
Chronic Kidney Disease	31
Asthma	9
Osteoperosis	13
Atrial Fibrilation	11
Heart Failure	25
Chronic Obstructive Pulmonary Disease	16
Diabetes	35
Dementia	29
Cancer	6

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	451

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	140
Female	163

**Ethnicity**
Non-Hispanic White	196
Black	27
Hispanic	63
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	118
From 75 to 84	107
85 and over	28
Less than 65	50

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2020

Hypertension	63
High Cholesterol	48
Stroke	7
Ischemic Heart Disease	33
Depression	38
Chronic Kidney Disease	33
Asthma	10
Osteoperosis	14
Atrial Fibrilation	8
Heart Failure	26
Chronic Obstructive Pulmonary Disease	15
Diabetes	33
Dementia	27
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2021 were hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	486
hospital care	35
inpatient care	35

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	151
Female	189

**Ethnicity**
Non-Hispanic White	220
Black	23
Hispanic	78
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	108
85 and over	38
Less than 65	52

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2021

Hypertension	63
High Cholesterol	53
Stroke	10
Ischemic Heart Disease	30
Depression	36
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	12
Atrial Fibrilation	9
Heart Failure	23
Chronic Obstructive Pulmonary Disease	14
Diabetes	32
Dementia	27
Cancer	8

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2022 were minimally invasive procedures, injections, hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	582
hospital care	56
injections	62
inpatient care	56
minimally invasive procedures	62

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	165
Female	208

**Ethnicity**
Non-Hispanic White	226
Black	26
Hispanic	91
Asian	19
Other	0
Native American	0

**Age**
From 65 to 74	140
From 75 to 84	113
85 and over	43
Less than 65	77

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2022

Hypertension	71
High Cholesterol	63
Stroke	17
Ischemic Heart Disease	21
Depression	34
Chronic Kidney Disease	22
Asthma	13
Osteoperosis	19
Atrial Fibrilation	14
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	32
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2023 were minimally invasive procedures, injections, hospital care and inpatient care.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	543
hospital care	20
injections	70
inpatient care	20
minimally invasive procedures	70

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	159
Female	168

**Ethnicity**
Non-Hispanic White	213
Black	19
Hispanic	73
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	119
From 75 to 84	110
85 and over	43
Less than 65	55

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2023

Hypertension	74
High Cholesterol	68
Stroke	17
Ischemic Heart Disease	24
Depression	35
Chronic Kidney Disease	23
Asthma	12
Osteoperosis	18
Atrial Fibrilation	17
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	33
Dementia	21
Cancer	12

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA during 2024 were minimally invasive procedures and injections.

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

doctor visit	543
injections	62
minimally invasive procedures	62

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	132
Female	179

**Ethnicity**
Non-Hispanic White	199
Black	21
Hispanic	71
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	112
85 and over	40
Less than 65	49

Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD in 2024

Hypertension	73
High Cholesterol	73
Stroke	13
Ischemic Heart Disease	21
Depression	35
Chronic Kidney Disease	20
Asthma	14
Osteoperosis	20
Atrial Fibrilation	14
Heart Failure	22
Chronic Obstructive Pulmonary Disease	15
Diabetes	33
Dementia	19
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Karen Phyllis Frei, MD for Medicare patients.

The highest averages for the top procedures that Dr. Karen Phyllis Frei, MD treated as a neurologist in Loma Linda, CA were minimally invasive procedures, injections, hospital care and inpatient care.

doctor visit	588
hospital care	45
injections	53
inpatient care	45
minimally invasive procedures	53

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Karen Phyllis Frei, MD.

**Gender**
Male	158
Female	192

**Ethnicity**
Black / African American	22
Asian / Pacific Islander	3
Non-Hispanic White	234
Hispanic	69
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	103
85 and over	36
Less than 65	72
65 to 74	138

Average of Total of Conditions of Medicare patients treated by Dr. Karen Phyllis Frei, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Karen Phyllis Frei, MD treated were hypertension, high cholesterol, depression and diabetes.

Hypertension	60
High Cholesterol	49
Stroke	10
Ischemic Heart Disease	27
Depression	33
Chronic Kidney Disease	26
Asthma	10
Osteoporosis	12
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Atrial Fibrillation	9
Cancer	7
Dementia	22

Education & Training

Dr. Karen Phyllis Frei, MD graduated from Thomas Jefferson University, Jefferson Medical College. She completed residency at VA Greater Los Angeles Healthcare System. She is certified by the American Board of Psychiatry and Neurology, Neurology and has a state license in California.

Medical School: Thomas Jefferson University, Jefferson Medical College

Residency: VA Greater Los Angeles Healthcare System

Board Certification: American Board of Psychiatry and Neurology, Neurology

Licensed In: California

Ratings & Reviews

Dr. Karen Phyllis Frei, MD has an exceptional overall rating with an average of 4.66 out of 5 stars based on 292 ratings. We collect ratings and reviews of Dr. Karen Phyllis Frei, MD from all over the web to help you find the right in Loma Linda, CA.

4.66

Overall Rating

(292 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Teva Pharmaceuticals USA, Inc.	$32,559 AZILECT $31,651	No Product Specified $280	Unclassified $188	AUSTEDO $112	COPAXONE $2	Other $327
Medtronic, Inc.	$1,190 PERCEPT PC BRAINSENSE $1,190
Medtronic USA, Inc.	$929 ACTIVA $576	Deep Brain Neurostimulation $353
Boston Scientific Corporation	$717 GENERAL DBS $553	GENERAL - DBS $99	VERCISE $65
ACADIA Pharmaceuticals Inc	$545 NUPLAZID $420	DAYBUE $125
Other	$3,501 Deep Brain Neurostimulation $429	Duopa $343	NORTHERA $319	INGREZZA $283	NOURIANZ $270	Other $1,855

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$15,500
Honoraria	$13,500
Food and Beverage	$6,773
Travel and Lodging	$2,967
Education	$513
Other	$188

Research Payments

Dr. Karen Phyllis Frei, MD has received 755 research payments totaling $2,123,787.

Biography

Dr. Karen Frei works as a neurology (brain & spinal cord disease). On average, patients gave Dr. Frei a rating of 4.5 stars (out of 5). In her practice, she is particularly interested in onabotulinumtoxinA (botox, botox cosmetic), movement disorders, and incobotulinumtoxinA (xeomin). She is affiliated with Loma Linda University Health. She graduated from Thomas Jefferson University, Jefferson Medical College and then she performed her residency at VA Greater Los Angeles Healthcare System and Barrow Neurological Institute.