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Dr. Joseph Louis Demer, PhD, MD

Accepting New Patients
(Dr. Joseph Demer, MD)
Specializes in: Pediatric Ophthalmology
Johns Hopkins University School of Medicine (1983)
Professional interests include: eye problems, strabismus
200 Stein Plaza Doris Stein 2nd Floor
Los Angeles, CA 90095

Dr. Joseph Louis Demer, PhD, MD is a pediatric ophthalmologist in Los Angeles, CA specializing in pediatric ophthalmology. He graduated from Johns Hopkins University School of Medicine in 1983 and has 43 years of experience. Dr. Joseph Louis Demer, PhD, MD is affiliated with UCLA Health and Ronald Reagan UCLA Medical Center.

View Doctor's Full Profile (310) 267-3937

Office Locations

200 Stein Plaza Doris Stein 2nd Floor
Los Angeles, CA 90095
open_in_new

Some issues Dr. Joseph Louis Demer, PhD, MD can help you with:

Eye Problems

Millions of people every year have problems with their eyes. Some of the most common eye problems are refractive disorders, glaucoma, diabetic retinopathy, macular degeneration, and cataracts.

Refractive disorders happen when the shape of the eye doesn't let allow someone focus very precisely. They might be myopic (nearsighted), hyperopic (farsighted), or have an astigmatism, which is a focus problem caused by the cornea. Refractive disorders can be corrected by glasses or contacts.

Glaucoma is the leading cause of blindness in the United States. It happens when fluid pressure builds up within the eye and damages the optic nerve. It is treated with medications and surgery.

Diabetic retinopathy is a common complication of diabetes. The retina is tissue at the back of the eye that is filled with numerous, tiny blood vessels. When diabetes damages these delicate blood vessels, they burst or leak, leading to blind spots and blurred vision. Diabetic retinopathy can be treated with laser therapy and surgery, but often vision cannot be restored.

Macular degeneration is common in older adults. The macula is the central part of the retina and is responsible for crisp center vision. Over time, the cells in the macula begin to die, making central vision blurry. An early symptom of macular degeneration is that straight lines appear wavy.

Cataracts happen when the clear lens in the front of the eye becomes cloudy, making things look blurry or faded. They are extremely common in older people. By age 80, more than half of all Americans will have had a cataract. In early stages, prescription glasses and magnifying lenses can help. As the cataracts get worse, surgery to replace the lens may be the best option.

More than just one of the five senses, the eyes are heavily relied upon to communicate, work, and get around every day. It's important to have regular eye exams for vision stays in good shape for years to come.

Noteworthy Medicare Patient Procedures Performed by Dr. Joseph Louis Demer, PhD, MD in 2024

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

Top 25%

By Volume:

strabismus surgery

In 2012, Dr. Joseph Louis Demer, PhD, MD performed more strabismus surgery procedures for Medicare patients than 75% of providers in related specialties within California.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2012 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

doctor visit 52
eye procedures 133

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2013 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 140

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 48
Female 66
Ethnicity
Non-Hispanic White 100
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 40
From 75 to 84 42
85 and over 18
Less than 65 14

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2013

Hypertension 63
High Cholesterol 54
Stroke 0
Ischemic Heart Disease 32
Depression 23
Chronic Kidney Disease 11
Asthma 11
Osteoperosis 15
Atrial Fibrilation 13
Heart Failure 15
Chronic Obstructive Pulmonary Disease 0
Diabetes 18
Dementia 11
Cancer 12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2014 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 210

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 41
Female 64
Ethnicity
Non-Hispanic White 83
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 46
From 75 to 84 36
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2014

Hypertension 54
High Cholesterol 63
Stroke 12
Ischemic Heart Disease 34
Depression 24
Chronic Kidney Disease 10
Asthma 0
Osteoperosis 15
Atrial Fibrilation 10
Heart Failure 10
Chronic Obstructive Pulmonary Disease 0
Diabetes 23
Dementia 0
Cancer 10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2015 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 188

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 90
Female 146
Ethnicity
Non-Hispanic White 196
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 96
From 75 to 84 74
85 and over 38
Less than 65 28

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2015

Hypertension 53
High Cholesterol 53
Stroke 0
Ischemic Heart Disease 37
Depression 31
Chronic Kidney Disease 19
Asthma 16
Osteoperosis 14
Atrial Fibrilation 10
Heart Failure 19
Chronic Obstructive Pulmonary Disease 13
Diabetes 24
Dementia 0
Cancer 11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2016 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 234

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 55
Female 74
Ethnicity
Non-Hispanic White 105
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 55
From 75 to 84 40
85 and over 22
Less than 65 12

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2016

Hypertension 53
High Cholesterol 55
Stroke 0
Ischemic Heart Disease 34
Depression 23
Chronic Kidney Disease 22
Asthma 10
Osteoperosis 0
Atrial Fibrilation 0
Heart Failure 13
Chronic Obstructive Pulmonary Disease 0
Diabetes 26
Dementia 0
Cancer 0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2017 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 194

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 53
Female 70
Ethnicity
Non-Hispanic White 96
Black 0
Hispanic 0
Asian 13
Other 0
Native American 0
Age
From 65 to 74 54
From 75 to 84 39
85 and over 17
Less than 65 13

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2017

Hypertension 59
High Cholesterol 50
Stroke 11
Ischemic Heart Disease 33
Depression 21
Chronic Kidney Disease 26
Asthma 12
Osteoperosis 15
Atrial Fibrilation 0
Heart Failure 16
Chronic Obstructive Pulmonary Disease 10
Diabetes 21
Dementia 11
Cancer 0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2018 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 261

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 63
Female 91
Ethnicity
Non-Hispanic White 127
Black 0
Hispanic 0
Asian 12
Other 0
Native American 0
Age
From 65 to 74 74
From 75 to 84 52
85 and over 16
Less than 65 12

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2018

Hypertension 58
High Cholesterol 66
Stroke 10
Ischemic Heart Disease 32
Depression 33
Chronic Kidney Disease 19
Asthma 14
Osteoperosis 16
Atrial Fibrilation 11
Heart Failure 14
Chronic Obstructive Pulmonary Disease 10
Diabetes 23
Dementia 7
Cancer 14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2019 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 310

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 94
Female 91
Ethnicity
Non-Hispanic White 150
Black 0
Hispanic 0
Asian 14
Other 0
Native American 0
Age
From 65 to 74 83
From 75 to 84 61
85 and over 23
Less than 65 18

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2019

Hypertension 56
High Cholesterol 59
Stroke 0
Ischemic Heart Disease 36
Depression 26
Chronic Kidney Disease 27
Asthma 9
Osteoperosis 16
Atrial Fibrilation 8
Heart Failure 10
Chronic Obstructive Pulmonary Disease 8
Diabetes 24
Dementia 8
Cancer 9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2020 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 240

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 65
Female 72
Ethnicity
Non-Hispanic White 114
Black 0
Hispanic 0
Asian 11
Other 0
Native American 0
Age
From 65 to 74 62
From 75 to 84 47
85 and over 15
Less than 65 13

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2020

Hypertension 63
High Cholesterol 62
Stroke 0
Ischemic Heart Disease 39
Depression 33
Chronic Kidney Disease 27
Asthma 9
Osteoperosis 20
Atrial Fibrilation 13
Heart Failure 10
Chronic Obstructive Pulmonary Disease 11
Diabetes 23
Dementia 0
Cancer 14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2021 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

eye procedures 352

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 86
Female 104
Ethnicity
Non-Hispanic White 141
Black 0
Hispanic 15
Asian 16
Other 0
Native American 0
Age
From 65 to 74 73
From 75 to 84 76
85 and over 23
Less than 65 18

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2021

Hypertension 60
High Cholesterol 65
Stroke 8
Ischemic Heart Disease 36
Depression 26
Chronic Kidney Disease 23
Asthma 9
Osteoperosis 18
Atrial Fibrilation 8
Heart Failure 17
Chronic Obstructive Pulmonary Disease 9
Diabetes 25
Dementia 9
Cancer 13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2022 were eye procedures and plastic surgery procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

doctor visit 20
eye procedures 304
plastic surgery procedures 12

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 74
Female 98
Ethnicity
Non-Hispanic White 132
Black 0
Hispanic 0
Asian 19
Other 0
Native American 0
Age
From 65 to 74 73
From 75 to 84 68
85 and over 15
Less than 65 16

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2022

Hypertension 64
High Cholesterol 75
Stroke 16
Ischemic Heart Disease 27
Depression 23
Chronic Kidney Disease 18
Asthma 10
Osteoperosis 22
Atrial Fibrilation 15
Heart Failure 13
Chronic Obstructive Pulmonary Disease 8
Diabetes 25
Dementia 0
Cancer 15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2023 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

doctor visit 51
eye procedures 226

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 75
Female 97
Ethnicity
Non-Hispanic White 131
Black 0
Hispanic 0
Asian 18
Other 0
Native American 0
Age
From 65 to 74 75
From 75 to 84 65
85 and over 13
Less than 65 19

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2023

Hypertension 67
High Cholesterol 71
Stroke 10
Ischemic Heart Disease 28
Depression 23
Chronic Kidney Disease 22
Asthma 14
Osteoperosis 23
Atrial Fibrilation 13
Heart Failure 15
Chronic Obstructive Pulmonary Disease 12
Diabetes 23
Dementia 6
Cancer 17

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA during 2024 were eye procedures.

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

doctor visit 18
eye procedures 255

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 75
Female 92
Ethnicity
Non-Hispanic White 121
Black 0
Hispanic 15
Asian 18
Other 0
Native American 0
Age
From 65 to 74 76
From 75 to 84 59
85 and over 19
Less than 65 13

Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD in 2024

Hypertension 63
High Cholesterol 75
Stroke 10
Ischemic Heart Disease 22
Depression 22
Chronic Kidney Disease 16
Asthma 14
Osteoperosis 26
Atrial Fibrilation 12
Heart Failure 14
Chronic Obstructive Pulmonary Disease 10
Diabetes 23
Dementia 0
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Joseph Louis Demer, PhD, MD for Medicare patients.

The highest averages for the top procedures that Dr. Joseph Louis Demer, PhD, MD treated as a pediatric ophthalmologist in Los Angeles, CA were eye procedures and plastic surgery procedures.

doctor visit 35
eye procedures 234
plastic surgery procedures 12

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD.

Gender
Male 63
Female 81
Ethnicity
Black / African American 0
Asian / Pacific Islander 9
Non-Hispanic White 115
Native American / Alaskan Native 0
Hispanic 2
Other 0
Age
75 to 84 50
85 and over 16
Less than 65 13
65 to 74 62

Average of Total of Conditions of Medicare patients treated by Dr. Joseph Louis Demer, PhD, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Joseph Louis Demer, PhD, MD treated were high cholesterol, hypertension, ischemic heart disease and depression.

Hypertension 54
High Cholesterol 57
Stroke 5
Ischemic Heart Disease 30
Depression 23
Chronic Kidney Disease 18
Asthma 9
Osteoporosis 15
Heart Failure 12
Chronic Obstructive Pulmonary Disease 7
Diabetes 21
Atrial Fibrillation 8
Dementia 4
Cancer 10

Education & Training

Dr. Joseph Louis Demer, PhD, MD graduated from Johns Hopkins University School of Medicine in 1983. He completed residency at Baylor College of Medicine Affiliated Hospitals. He is certified by the Ophthalmology, American Board of Ophthalmology and has a state license in California.

Medical School: Johns Hopkins University School of Medicine (1983)

Residency: Baylor College of Medicine Affiliated Hospitals (1987)

Board Certification: Ophthalmology, American Board of Ophthalmology (1988)

Licensed In: California

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. Joseph Louis Demer, PhD, MD appears to accept the following insurance providers: Private Healthcare Systems (PHCS), TRICARE, Cigna, Aetna, Blue Shield of California, MultiPlan, Anthem, UnitedHealthcare, Medicare Advantage, Prime Health, First Health, HealthSmart, Centivo, Health Net of California and UFCM Health System.

Insurance Accepted by Provider includes:

According to our sources, Dr. Joseph Louis Demer, PhD, MD accepts the following insurance providers:

Private Healthcare Systems (PHCS)
TRICARE
Cigna
Aetna
Blue Shield of California
MultiPlan
Anthem
UnitedHealthcare
Medicare Advantage
Prime Health
First Health
HealthSmart
Centivo
Health Net of California
UFCM Health System

Ratings & Reviews

Dr. Joseph Louis Demer, PhD, MD has a high overall rating with an average of 4.25 out of 5 stars based on 4 ratings. We collect ratings and reviews of Dr. Joseph Louis Demer, PhD, MD from all over the web to help you find the right in Los Angeles, CA. 

4.25
Overall Rating
Leave a Review

General Payments

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

Payments by Company
Horizon Therapeutics plc $65 TEPEZZA
$65
Alcon Laboratories Inc $52
$52
Travere Therapeutics, Inc. $2 Cholbam
$1 		(820) Cholbam
$1
Types of Payments
Food and Beverage $117
Education $2

Biography

Dr. Joseph Demer is a Los Angeles, CA physician who specializes in pediatric ophthalmology. He is especially interested in strabismus. Dr. Demer is affiliated with Ronald Reagan UCLA Medical Center. Before performing his residency at a hospital affiliated with Baylor College of Medicine, Dr. Demer attended Johns Hopkins University School of Medicine. On average, patients gave Dr. Demer a rating of 4.0 stars (out of 5). He seems to honor several insurance carriers, including Anthem, UnitedHealthcare, and Blue Cross/Blue Shield. Distinctions awarded to Dr. Demer include: Bielschowski Award Lectureship, International Strabismological Association; Lifetime Achievement Award, American Association for Pediatric Ophthalmology and Strabismus; and Southern California Super Doctors. Dr. Demer has an open panel in Los Angeles, CA according to UCLA Health.

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