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Dr. Duncan Friedman, MD, MPH

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Specializes in: Vitreoretinal Diseases (Retina and Vitreous) and General Ophthalmology

Louisiana State University School of Medicine in New Orleans

1100 North Main Avenue
San Antonio, TX 78212

(210) 880-3000

Dr. Duncan Friedman, MD, MPH is a retina specialist in San Antonio, TX specializing in vitreoretinal diseases (retina and vitreous) and general ophthalmology. He graduated from Louisiana State University School of Medicine in New Orleans. Dr. Duncan Friedman, MD, MPH is affiliated with CHRISTUS Health and Central Texas Retina Institute.

Office Locations

Central Texas Retina Institute

1100 North Main Avenue
San Antonio, TX 78212

(210) 880-3000

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Noteworthy Medicare Patient Procedures Performed by Dr. Duncan Friedman, MD, MPH in 2023

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

Top 5%

By Affordability:

corneal pachymetry

intermediate eye exam

ultrasound corneal pachymetry

In 2023, Dr. Duncan Friedman, MD, MPH had a list price for corneal pachymetry (corneal thickness test), intermediate eye exam, and ultrasound corneal pachymetry that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Texas. 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 10%

By Affordability:

eye exam

eye tests

scanning computerized ophthalmic diagnostic imaging

SCODI of the posterior segment

visual field test

In 2023, Dr. Duncan Friedman, MD, MPH had a list price for eye exam, eye tests, scanning computerized ophthalmic diagnostic imaging (SCODI), SCODI of the posterior segment (SCODI-P), and visual field test that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Texas. 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:

eye procedures

SCODI of the posterior segment

By Affordability:

anterior segment surgery

comprehensive eye exam

ophthalmic ultrasound

In 2012, among providers in related specialties within Texas, Dr. Duncan Friedman, MD, MPH performed more eye procedures, and SCODI of the posterior segment (SCODI-P) procedures for Medicare patients than 75% of them and he also had a list price for anterior segment surgery, comprehensive eye exam, and ophthalmic ultrasound 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. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2012 were eye procedures, photocoagulation, laser treatment and emergency care.

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

doctor visit	45
emergency care	30
eye procedures	221
laser treatment	65
photocoagulation	65

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2013 were eye procedures, injections, photocoagulation and laser treatment.

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

doctor visit	64
eye procedures	1409
injections	222
laser treatment	28
photocoagulation	28

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	224
Female	290

**Ethnicity**
Non-Hispanic White	309
Black	0
Hispanic	155
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	153
85 and over	84
Less than 65	73

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2013

Hypertension	74
High Cholesterol	65
Stroke	5
Ischemic Heart Disease	45
Depression	17
Chronic Kidney Disease	30
Asthma	6
Osteoperosis	7
Atrial Fibrilation	11
Heart Failure	23
Chronic Obstructive Pulmonary Disease	12
Diabetes	45
Dementia	10
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2014 were eye procedures, injections, ultrasound (sonogram) and diagnostic imaging.

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	37
doctor visit	85
eye procedures	3857
injections	646
photocoagulation	32
ultrasound (sonogram)	50

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	275
Female	427

**Ethnicity**
Non-Hispanic White	414
Black	0
Hispanic	248
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	269
From 75 to 84	205
85 and over	143
Less than 65	85

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2014

Hypertension	71
High Cholesterol	62
Stroke	5
Ischemic Heart Disease	40
Depression	19
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	8
Atrial Fibrilation	8
Heart Failure	22
Chronic Obstructive Pulmonary Disease	10
Diabetes	45
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2015 were eye procedures, injections, photocoagulation and diagnostic imaging.

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	27
doctor visit	62
eye procedures	3481
injections	587
photocoagulation	32
prophylaxis (preventive treatment)	13
ultrasound (sonogram)	27

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	572
Female	812

**Ethnicity**
Non-Hispanic White	762
Black	0
Hispanic	548
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	556
From 75 to 84	398
85 and over	270
Less than 65	160

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2015

Hypertension	74
High Cholesterol	64
Stroke	7
Ischemic Heart Disease	38
Depression	19
Chronic Kidney Disease	34
Asthma	10
Osteoperosis	9
Atrial Fibrilation	7
Heart Failure	21
Chronic Obstructive Pulmonary Disease	11
Diabetes	46
Dementia	11
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2016 were eye procedures, injections, photocoagulation and diagnostic imaging.

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

capsulotomy	12
diagnostic imaging	42
doctor visit	21
eye procedures	4174
injections	616
laser treatment	32
photocoagulation	48
prophylaxis (preventive treatment)	11
ultrasound (sonogram)	42

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	311
Female	425

**Ethnicity**
Non-Hispanic White	427
Black	31
Hispanic	267
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	297
From 75 to 84	216
85 and over	144
Less than 65	79

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2016

Hypertension	72
High Cholesterol	62
Stroke	4
Ischemic Heart Disease	37
Depression	15
Chronic Kidney Disease	41
Asthma	11
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	22
Chronic Obstructive Pulmonary Disease	10
Diabetes	45
Dementia	11
Cancer	7

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2017 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	38
doctor visit	23
eye procedures	3955
injections	559
laser treatment	12
photocoagulation	27
prophylaxis (preventive treatment)	15
ultrasound (sonogram)	38

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	288
Female	467

**Ethnicity**
Non-Hispanic White	428
Black	30
Hispanic	285
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	286
From 75 to 84	239
85 and over	154
Less than 65	76

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2017

Hypertension	75
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	39
Depression	17
Chronic Kidney Disease	43
Asthma	6
Osteoperosis	11
Atrial Fibrilation	10
Heart Failure	21
Chronic Obstructive Pulmonary Disease	12
Diabetes	47
Dementia	14
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2018 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	43
eye procedures	4453
injections	749
laser treatment	14
photocoagulation	14
ultrasound (sonogram)	43

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	351
Female	488

**Ethnicity**
Non-Hispanic White	481
Black	43
Hispanic	299
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	315
From 75 to 84	257
85 and over	188
Less than 65	79

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2018

Hypertension	75
High Cholesterol	69
Stroke	4
Ischemic Heart Disease	41
Depression	17
Chronic Kidney Disease	42
Asthma	5
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	9
Diabetes	44
Dementia	12
Cancer	7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2019 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

capsulotomy	23
diagnostic imaging	48
eye procedures	5093
injections	788
laser treatment	37
photocoagulation	27
ultrasound (sonogram)	48

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	353
Female	481

**Ethnicity**
Non-Hispanic White	487
Black	40
Hispanic	290
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	323
From 75 to 84	251
85 and over	192
Less than 65	68

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2019

Hypertension	75
High Cholesterol	66
Stroke	6
Ischemic Heart Disease	40
Depression	18
Chronic Kidney Disease	42
Asthma	7
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	21
Chronic Obstructive Pulmonary Disease	10
Diabetes	45
Dementia	13
Cancer	8

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2020 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	37
eye procedures	3922
injections	725
ultrasound (sonogram)	37

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	323
Female	426

**Ethnicity**
Non-Hispanic White	442
Black	31
Hispanic	262
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	288
From 75 to 84	244
85 and over	151
Less than 65	66

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2020

Hypertension	73
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	39
Depression	19
Chronic Kidney Disease	44
Asthma	7
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	44
Dementia	12
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2021 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

diagnostic imaging	38
eye procedures	3801
injections	701
ultrasound (sonogram)	38

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	310
Female	366

**Ethnicity**
Non-Hispanic White	399
Black	25
Hispanic	234
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	277
From 75 to 84	206
85 and over	133
Less than 65	60

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2021

Hypertension	75
High Cholesterol	68
Stroke	5
Ischemic Heart Disease	40
Depression	19
Chronic Kidney Disease	47
Asthma	5
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	45
Dementia	13
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX during 2022 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

capsulotomy	12
diagnostic imaging	26
eye procedures	3649
injections	634
laser treatment	12
ultrasound (sonogram)	26

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	276
Female	349

**Ethnicity**
Non-Hispanic White	382
Black	19
Hispanic	206
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	254
From 75 to 84	192
85 and over	129
Less than 65	50

Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH in 2022

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	32
Depression	18
Chronic Kidney Disease	33
Asthma	9
Osteoperosis	16
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	42
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Duncan Friedman, MD, MPH for Medicare patients.

The highest averages for the top procedures that Dr. Duncan Friedman, MD, MPH treated as a retina specialist in San Antonio, TX were eye procedures, injections, ultrasound (sonogram) and diagnostic imaging.

capsulotomy	15
diagnostic imaging	37
doctor visit	50
emergency care	30
eye procedures	3455
injections	622
laser treatment	28
photocoagulation	34
prophylaxis (preventive treatment)	13
ultrasound (sonogram)	38

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Duncan Friedman, MD, MPH.

**Gender**
Male	298
Female	411

**Ethnicity**
Black / African American	19
Asian / Pacific Islander	0
Non-Hispanic White	411
Native American / Alaskan Native	0
Hispanic	254
Other	0

**Age**
75 to 84	214
85 and over	144
Less than 65	72
65 to 74	279

Average of Total of Conditions of Medicare patients treated by Dr. Duncan Friedman, MD, MPH From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Duncan Friedman, MD, MPH treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	67
High Cholesterol	59
Stroke	5
Ischemic Heart Disease	35
Depression	16
Chronic Kidney Disease	35
Asthma	6
Osteoporosis	8
Heart Failure	18
Chronic Obstructive Pulmonary Disease	9
Diabetes	40
Atrial Fibrillation	9
Dementia	10
Cancer	7

Education & Training

Dr. Duncan Friedman, MD, MPH graduated from Louisiana State University School of Medicine in New Orleans. He completed residency at University of Alabama Affiliated Hospitals. He is certified by the Certification: American Board of Ophthalmology and has a state license in Texas.

Medical School: Louisiana State University School of Medicine in New Orleans

Residency: University of Alabama Affiliated Hospitals

Board Certification: Certification: American Board of Ophthalmology

Licensed In: Texas

Affiliations & Hospitals

Dr. Duncan Friedman, MD, MPH is associated with these hospitals and organizations:

CHRISTUS Health

Central Texas Retina Institute

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. Duncan Friedman, MD, MPH appears to accept the following insurance providers: TRICARE, Cigna, Aetna, Oscar, United Healthcare, Blue Cross, Medicaid, MultiPlan POS and Humana.

Insurance Accepted by Provider includes:

According to our sources, Dr. Duncan Friedman, MD, MPH accepts the following insurance providers:

TRICARE

Cigna

Aetna

Oscar

United Healthcare

Blue Cross

Medicaid

MultiPlan POS

Humana

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General Payments

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

**Payments by Company**
Allergan Inc.	$5,690 OZURDEX $5,283	COMBIGAN $125	RESTASIS $32	$250
Synergetics USA, Inc	$3,150 Forceps $3,150
Alimera Sciences, Inc.	$1,703 ILUVIEN $1,687	$16
Genentech USA, Inc.	$1,173 VABYSMO $542	LUCENTIS $371	SUSVIMO $44	$216
Regeneron Healthcare Solutions, Inc.	$785 Eylea $458	EYLEA aflibercept injection $194	EYLEA HD $133
Other	$3,871 XIIDRA $370	AmnioGuard $352	Eylea $258	OZURDEX $238	PROLENSA $218	Other $2,434

**Types of Payments**
Food and Beverage	$7,329
Consulting Fee	$4,000
Gift	$3,150
Honoraria	$1,000
Travel and Lodging	$422
Other	$470

Biography

Dr. Duncan Friedman is a physician who specializes in general ophthalmology and vitreoretinal diseases (retina and vitreous). He obtained his medical school training at Louisiana State University School of Medicine in New Orleans and performed his residency at a hospital affiliated with the University of Alabama. Dr. Friedman is an in-network provider for several insurance carriers, including MultiPlan, Blue Cross, and Blue California. Awards and/or distinctions he has received include Texas Super Doctors and Texas Rising Stars. He is affiliated with CHRISTUS Health. According to DocSpot, new patients are welcome to contact his office in.