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Home > CA Providers > Neurosurgeons

Dr. Daniel R. Lemay, MD, PhD

Accepting New Patients

(6 Ratings)

Specializes in: Neurosurgery

University of Michigan Medical School

8043 2nd Street Suite 105
Downey, CA 90241

(562) 999-6724

Dr. Daniel R. Lemay, MD, PhD is a neurosurgeon in Downey, CA specializing in neurosurgery. He graduated from University of Michigan Medical School. Dr. Daniel R. Lemay, MD, PhD is affiliated with Torrance Memorial, Dignity Health, PIH Health, St. Francis Medical Center and St Mary Medical Center Long Beach.

Office Locations

St Mary Medical Center Long Beach

8043 2nd Street Suite 105
Downey, CA 90241

(562) 999-6724

(562) 861-9895

open_in_new

In The News

“A neurologist, Carlos Rosario, and a neurosurgeon, Daniel Le May, also were suspended this week while moonlighting allegations against them are investigated, county officials said.”—"Besieged Hospital 'Cleaning House'", Los Angeles Times, May 2005

Noteworthy Medicare Patient Procedures Performed by Dr. Daniel R. Lemay, MD, PhD in 2023

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

Top 10%

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2023, Dr. Daniel R. Lemay, MD, PhD had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) 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:

inpatient hospital care

By Affordability:

decompression surgery

decompressive laminectomy

decompressive lumbar laminectomy

laminectomy with foraminotomy and facetectomy

lumbar decompression

lumbar laminectomy

lumbar spine surgery

nerve decompression surgery

nerve procedures

nerve surgery

spinal decompression

spinal decompression surgery

spine surgery procedures

In 2012, among providers in related specialties within California, Dr. Daniel R. Lemay, MD, PhD performed more inpatient hospital care (for patient admitted to hospital) procedures for Medicare patients than 75% of them and he also had a list price for decompression surgery, decompressive laminectomy, decompressive lumbar laminectomy, emergency care, emergency room (ER) care, facetectomy, foraminotomy, lamina procedures, laminectomy, laminectomy with foraminotomy and facetectomy, lumbar decompression, lumbar laminectomy, lumbar spine surgery, nerve decompression surgery, nerve procedures, nerve surgery, spinal decompression, spinal decompression surgery, and spine surgery procedures 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. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2012 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

arthrodesis (bone fusion surgery)	12
decompression surgery	12
doctor visit	288
emergency care	11
hospital care	147
inpatient care	147
neck surgery	12
nerve procedures	12
spinal procedures	12

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2013 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

decompression surgery	11
doctor visit	297
hospital care	120
inpatient care	120
nerve procedures	11
spinal procedures	11

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	114
Female	133

**Ethnicity**
Non-Hispanic White	89
Black	35
Hispanic	110
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	61
85 and over	32
Less than 65	61

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2013

Hypertension	75
High Cholesterol	62
Stroke	21
Ischemic Heart Disease	56
Depression	32
Chronic Kidney Disease	40
Asthma	15
Osteoperosis	12
Atrial Fibrilation	10
Heart Failure	36
Chronic Obstructive Pulmonary Disease	28
Diabetes	57
Dementia	26
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2014 were hospital care, inpatient care, cranial surgery and nerve procedures.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

cranial surgery	14
decompression surgery	13
doctor visit	202
emergency care	13
hospital care	116
inpatient care	116
nerve procedures	13
spinal procedures	13

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	96
Female	128

**Ethnicity**
Non-Hispanic White	64
Black	34
Hispanic	114
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	53
85 and over	32
Less than 65	57

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2014

Hypertension	75
High Cholesterol	60
Stroke	27
Ischemic Heart Disease	47
Depression	32
Chronic Kidney Disease	43
Asthma	8
Osteoperosis	11
Atrial Fibrilation	6
Heart Failure	31
Chronic Obstructive Pulmonary Disease	20
Diabetes	58
Dementia	24
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2015 were hospital care, inpatient care and cranial surgery.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

cranial surgery	14
doctor visit	173
hospital care	91
inpatient care	91

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	152
Female	224

**Ethnicity**
Non-Hispanic White	98
Black	60
Hispanic	192
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	92
85 and over	48
Less than 65	100

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2015

Hypertension	75
High Cholesterol	55
Stroke	22
Ischemic Heart Disease	45
Depression	29
Chronic Kidney Disease	38
Asthma	17
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	26
Chronic Obstructive Pulmonary Disease	21
Diabetes	50
Dementia	21
Cancer	7

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2016 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	141
emergency care	17
hospital care	77
inpatient care	77

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	82
Female	86

**Ethnicity**
Non-Hispanic White	53
Black	20
Hispanic	81
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	59
From 75 to 84	37
85 and over	23
Less than 65	49

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2016

Hypertension	74
High Cholesterol	57
Stroke	25
Ischemic Heart Disease	45
Depression	32
Chronic Kidney Disease	49
Asthma	23
Osteoperosis	11
Atrial Fibrilation	11
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	58
Dementia	23
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2017 were hospital care, inpatient care, emergency care and nerve procedures.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

decompression surgery	13
doctor visit	140
emergency care	37
hospital care	105
inpatient care	105
nerve procedures	13
spinal procedures	13

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	115
Female	93

**Ethnicity**
Non-Hispanic White	58
Black	31
Hispanic	100
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	69
From 75 to 84	47
85 and over	29
Less than 65	63

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2017

Hypertension	75
High Cholesterol	52
Stroke	23
Ischemic Heart Disease	43
Depression	35
Chronic Kidney Disease	51
Asthma	9
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	34
Chronic Obstructive Pulmonary Disease	22
Diabetes	59
Dementia	27
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2018 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	140
emergency care	37
hospital care	78
inpatient care	78

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	92
Female	97

**Ethnicity**
Non-Hispanic White	51
Black	35
Hispanic	88
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	65
From 75 to 84	52
85 and over	21
Less than 65	51

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2018

Hypertension	75
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	42
Depression	35
Chronic Kidney Disease	50
Asthma	14
Osteoperosis	11
Atrial Fibrilation	10
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	55
Dementia	28
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2019 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	98
emergency care	27
hospital care	94
inpatient care	94

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	83
Female	113

**Ethnicity**
Non-Hispanic White	51
Black	34
Hispanic	86
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	36
85 and over	19
Less than 65	64

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2019

Hypertension	75
High Cholesterol	64
Stroke	22
Ischemic Heart Disease	33
Depression	41
Chronic Kidney Disease	53
Asthma	11
Osteoperosis	11
Atrial Fibrilation	10
Heart Failure	30
Chronic Obstructive Pulmonary Disease	21
Diabetes	59
Dementia	26
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2020 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	121
emergency care	41
hospital care	121
inpatient care	121

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	103
Female	105

**Ethnicity**
Non-Hispanic White	61
Black	37
Hispanic	91
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	43
85 and over	22
Less than 65	62

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2020

Hypertension	75
High Cholesterol	64
Stroke	28
Ischemic Heart Disease	42
Depression	35
Chronic Kidney Disease	52
Asthma	9
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	30
Chronic Obstructive Pulmonary Disease	25
Diabetes	54
Dementia	25
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2021 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	105
emergency care	21
hospital care	105
inpatient care	105

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	94
Female	78

**Ethnicity**
Non-Hispanic White	47
Black	0
Hispanic	81
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	39
85 and over	24
Less than 65	46

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2021

Hypertension	75
High Cholesterol	58
Stroke	27
Ischemic Heart Disease	40
Depression	30
Chronic Kidney Disease	55
Asthma	10
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	34
Chronic Obstructive Pulmonary Disease	20
Diabetes	53
Dementia	26
Cancer	8

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA during 2022 were hospital care, inpatient care and emergency care.

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

doctor visit	118
emergency care	28
hospital care	148
inpatient care	148

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	89
Female	111

**Ethnicity**
Non-Hispanic White	47
Black	30
Hispanic	101
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	73
From 75 to 84	55
85 and over	25
Less than 65	47

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2022

Hypertension	75
High Cholesterol	75
Stroke	28
Ischemic Heart Disease	28
Depression	25
Chronic Kidney Disease	28
Asthma	13
Osteoperosis	15
Atrial Fibrilation	18
Heart Failure	24
Chronic Obstructive Pulmonary Disease	18
Diabetes	50
Dementia	20
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Daniel R. Lemay, MD, PhD for Medicare patients.

The highest averages for the top procedures that Dr. Daniel R. Lemay, MD, PhD treated as a neurosurgeon in Downey, CA were hospital care, inpatient care, emergency care and cranial surgery.

arthrodesis (bone fusion surgery)	12
cranial surgery	14
decompression surgery	12
doctor visit	165
emergency care	25
hospital care	109
inpatient care	109
neck surgery	12
nerve procedures	12
spinal procedures	12

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD.

**Gender**
Male	92
Female	106

**Ethnicity**
Black / African American	28
Asian / Pacific Islander	0
Non-Hispanic White	56
Native American / Alaskan Native	0
Hispanic	94
Other	0

**Age**
75 to 84	46
85 and over	25
Less than 65	54
65 to 74	72

Average of Total of Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Daniel R. Lemay, MD, PhD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	68
High Cholesterol	55
Stroke	20
Ischemic Heart Disease	38
Depression	29
Chronic Kidney Disease	41
Asthma	11
Osteoporosis	10
Heart Failure	27
Chronic Obstructive Pulmonary Disease	19
Diabetes	50
Atrial Fibrillation	10
Dementia	22
Cancer	8

Education & Training

Dr. Daniel R. Lemay, MD, PhD graduated from University of Michigan Medical School. He completed residency at Los Angeles County+USC Medical Center. He is certified by the Board Certification: Neurological Surgery and has a state license in California.

Medical School: University of Michigan Medical School

Residency: Los Angeles County+USC Medical Center

Board Certification: Board Certification: Neurological Surgery

Licensed In: California

Affiliations & Hospitals

Dr. Daniel R. Lemay, MD, PhD is associated with these hospitals and organizations:

Torrance Memorial

Dignity Health

PIH Health

St. Francis Medical Center

St Mary Medical Center Long Beach

Ratings & Reviews

Dr. Daniel R. Lemay, MD, PhD has a good overall rating with an average of 3.0 out of 5 stars based on 6 ratings. We collect ratings and reviews of Dr. Daniel R. Lemay, MD, PhD from all over the web to help you find the right in Downey, CA.

Overall Rating

(6 Ratings)

Leave a Review

Reviews Left On DocSpot

Overall Rating: 1.0 2018-03-20

very poor doctor.  the worst I have ever seen.

General Payments

These charts describe general payments received by Dr. Daniel R. Lemay, MD, PhD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
K2M, Inc.	$236 General K2M Product Discussion $236
Integrity Implants Inc	$60 FlareHawk $60
Cyberonics, Inc.	$31 VNS Therapy $31
Integra LifeSciences Corporation	$26 Neuro-Monitoring Catheters and Equipment $26
Alphatec Spine, Inc	$18 IdentiTi $18
Other	$50 ECHELON FLEX Stapler $16	Spine $15	TITAN NANOLOCK $7	$12

**Types of Payments**
Food and Beverage	$359
Gift	$60
Travel and Lodging	$2

Biography

Dr. Daniel Lemay is a Downey, CA physician who specializes in neurosurgery. He is rated 3.0 stars (out of 5) by his patients. Dr. Lemay attended medical school at the University of Michigan Medical School. For his professional training, Dr. Lemay completed a residency program at Los Angeles County+USC Medical Center. His professional affiliations include St. Francis Medical Center, Torrance Memorial, and Dignity Health. Dignity Health reports that he is accepting new patients at his office in Downey, CA.

Select Year:

Dr. Daniel R. Lemay, MD, PhD

Office Locations

In The News

Noteworthy Medicare Patient Procedures Performed by Dr. Daniel R. Lemay, MD, PhD 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. Daniel R. Lemay, MD, PhD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Daniel R. Lemay, MD, PhD 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. Daniel R. Lemay, MD, PhD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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