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Home > TX Providers > Diagnostic Radiologists

Dr. John A. Walker JR., MD

Accepting New Patients

(Dr. John Allen Walker Jr., M.D.)

(9 Ratings)

Specializes in: Interventional Radiology/Diagnostic Radiology (IR/DR) and Diagnostic Radiology

University of Texas Health Science Center at San Antonio, School of Medicine (2007)

Professional interests include: cancer, vulvar cancer, aneurysm, and more.

8311 Ewing Halsell Drive
San Antonio, TX 78229

(210) 562-8000

Dr. John A. Walker JR., MD is a radiologist in San Antonio, TX specializing in interventional radiology/diagnostic radiology (ir/dr) and diagnostic radiology. He graduated from University of Texas Health Science Center at San Antonio, School of Medicine in 2007 and has 18 years of experience. Dr. John A. Walker JR., MD is affiliated with UT Health San Antonio, University Health and THE UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT SAN ANTONIO.

Office Locations

University Health

4502 Medical Drive
San Antonio, TX 78229

(210) 358-4000

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UT Health San Antonio

7946 N. Loop 1604 West 1st Floor
San Antonio, TX 78249

(210) 567-9020

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UT Health San Antonio

8300 Floyd Curl Drive 3rd Floor - Suite 3d
San Antonio, TX 78229

(210) 450-6000

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UT Health San Antonio

8311 Ewing Halsell Drive
San Antonio, TX 78229

(210) 562-8000

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University Health

903 W Martin Street
San Antonio, TX 78207

(210) 358-3400

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Noteworthy Medicare Patient Procedures Performed by Dr. John A. Walker JR., MD in 2023

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

Top 5%

By Affordability:

abdominal biopsy

liver biopsy

liver core needle biopsy

liver needle biopsy

In 2023, Dr. John A. Walker JR., MD had a list price for abdominal biopsy, liver biopsy, liver core needle biopsy, and liver needle biopsy 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:

anastomosis

gastrostomy

ostomy

percutaneous fluoroscopic gastrostomy

percutaneous gastrostomy

tunneled central line placement

In 2023, Dr. John A. Walker JR., MD had a list price for anastomosis, gastrostomy (G-tube insertion), ostomy, percutaneous fluoroscopic gastrostomy, percutaneous gastrostomy, and tunneled central line placement 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:

liver core needle biopsy

By Affordability:

central line placement

In 2013, among providers in related specialties within Texas, Dr. John A. Walker JR., MD performed more liver core needle biopsy procedures for Medicare patients than 75% of them and he also had a list price for central line placement 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

2016 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2016 were ultrasound (sonogram) and abdominal imaging.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	14
ultrasound (sonogram)	14

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	61
Female	50

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

**Age**
From 65 to 74	40
From 75 to 84	0
85 and over	0
Less than 65	56

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2016

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2016 were chronic kidney disease, hypertension, diabetes and high cholesterol.

Hypertension	75
High Cholesterol	52
Stroke	13
Ischemic Heart Disease	47
Depression	32
Chronic Kidney Disease	75
Asthma	21
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	33
Chronic Obstructive Pulmonary Disease	19
Diabetes	56
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2017 were aspiration, ultrasound (sonogram), catheterization and abdominal imaging.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	27
aspiration	45
catheterization	28
diagnostic procedures	11
minimally invasive procedures	11
minor procedures	11
pleural drainage	19
thoracic (chest) imaging	13
ultrasound (sonogram)	40

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	143
Female	124

**Ethnicity**
Non-Hispanic White	99
Black	0
Hispanic	137
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	94
From 75 to 84	37
85 and over	11
Less than 65	125

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2017

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2017 were chronic kidney disease, hypertension, diabetes and high cholesterol.

Hypertension	75
High Cholesterol	57
Stroke	9
Ischemic Heart Disease	46
Depression	40
Chronic Kidney Disease	75
Asthma	9
Osteoperosis	6
Atrial Fibrilation	9
Heart Failure	32
Chronic Obstructive Pulmonary Disease	18
Diabetes	58
Dementia	18
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2018 were catheterization, ultrasound (sonogram), abdominal imaging and aspiration.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	25
anastomosis	11
aspiration	14
catheterization	27
gastrointestinal procedures	11
minimally invasive procedures	11
ultrasound (sonogram)	25

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	128
Female	133

**Ethnicity**
Non-Hispanic White	104
Black	0
Hispanic	134
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	100
From 75 to 84	44
85 and over	15
Less than 65	102

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2018

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2018 were chronic kidney disease, hypertension, high cholesterol and diabetes.

Hypertension	75
High Cholesterol	58
Stroke	8
Ischemic Heart Disease	48
Depression	37
Chronic Kidney Disease	75
Asthma	7
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	33
Chronic Obstructive Pulmonary Disease	15
Diabetes	57
Dementia	14
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2019 were aspiration, ultrasound (sonogram), abdominal imaging and minor procedures.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	14
aspiration	16
diagnostic procedures	12
doctor visit	13
minimally invasive procedures	12
minor procedures	12
ultrasound (sonogram)	14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	127
Female	77

**Ethnicity**
Non-Hispanic White	88
Black	0
Hispanic	97
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	0
85 and over	0
Less than 65	76

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2019

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2019 were chronic kidney disease, hypertension, high cholesterol and diabetes.

Hypertension	75
High Cholesterol	64
Stroke	7
Ischemic Heart Disease	50
Depression	31
Chronic Kidney Disease	75
Asthma	9
Osteoperosis	5
Atrial Fibrilation	12
Heart Failure	39
Chronic Obstructive Pulmonary Disease	23
Diabetes	58
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2020 were ultrasound (sonogram), abdominal imaging, aspiration and catheterization.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	40
aspiration	24
catheterization	11
ultrasound (sonogram)	40

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	114
Female	109

**Ethnicity**
Non-Hispanic White	103
Black	0
Hispanic	98
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	90
From 75 to 84	37
85 and over	16
Less than 65	80

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2020

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2020 were hypertension, chronic kidney disease, high cholesterol and diabetes.

Hypertension	75
High Cholesterol	64
Stroke	8
Ischemic Heart Disease	44
Depression	35
Chronic Kidney Disease	69
Asthma	9
Osteoperosis	8
Atrial Fibrilation	14
Heart Failure	37
Chronic Obstructive Pulmonary Disease	19
Diabetes	58
Dementia	20
Cancer	20

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2021 were ultrasound (sonogram), abdominal imaging, minimally invasive procedures and catheterization.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	52
anastomosis	11
aspiration	22
catheterization	23
CT scan	12
diagnostic procedures	17
doctor visit	27
gastrointestinal procedures	11
minimally invasive procedures	28
minor procedures	17
thoracic (chest) imaging	12
ultrasound (sonogram)	52

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	126
Female	104

**Ethnicity**
Non-Hispanic White	98
Black	17
Hispanic	102
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	97
From 75 to 84	0
85 and over	0
Less than 65	81

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2021

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2021 were hypertension, chronic kidney disease, high cholesterol and diabetes.

Hypertension	75
High Cholesterol	64
Stroke	8
Ischemic Heart Disease	40
Depression	31
Chronic Kidney Disease	73
Asthma	7
Osteoperosis	7
Atrial Fibrilation	10
Heart Failure	29
Chronic Obstructive Pulmonary Disease	17
Diabetes	53
Dementia	18
Cancer	21

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2022 were abdominal imaging, catheterization, ultrasound (sonogram) and minimally invasive procedures.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

abdominal imaging	55
anastomosis	15
aspiration	29
catheterization	43
CT scan	16
diagnostic procedures	17
doctor visit	33
gastrointestinal procedures	15
minimally invasive procedures	32
minor procedures	17
ultrasound (sonogram)	39

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	124
Female	124

**Ethnicity**
Non-Hispanic White	120
Black	0
Hispanic	103
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	59
85 and over	14
Less than 65	71

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2022

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2022 were high cholesterol, hypertension, chronic kidney disease and diabetes.

Hypertension	75
High Cholesterol	75
Stroke	21
Ischemic Heart Disease	37
Depression	31
Chronic Kidney Disease	52
Asthma	15
Osteoperosis	16
Atrial Fibrilation	21
Heart Failure	26
Chronic Obstructive Pulmonary Disease	20
Diabetes	50
Dementia	10
Cancer	25

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX during 2023 were minimally invasive procedures, catheterization, minor procedures and diagnostic procedures.

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

anastomosis	12
catheterization	23
diagnostic procedures	21
doctor visit	27
gastrointestinal procedures	12
minimally invasive procedures	33
minor procedures	21

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	105
Female	99

**Ethnicity**
Non-Hispanic White	103
Black	0
Hispanic	79
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	95
From 75 to 84	42
85 and over	12
Less than 65	55

Conditions of Medicare patients treated by Dr. John A. Walker JR., MD in 2023

The most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated during 2023 were high cholesterol, hypertension, diabetes and chronic kidney disease.

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	34
Depression	29
Chronic Kidney Disease	50
Asthma	13
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	20
Chronic Obstructive Pulmonary Disease	18
Diabetes	55
Dementia	12
Cancer	28

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2016 - 2023

Volume of procedures performed by Dr. John A. Walker JR., MD for Medicare patients.

The highest averages for the top procedures that Dr. John A. Walker JR., MD treated as a radiologist in San Antonio, TX were ultrasound (sonogram), abdominal imaging, catheterization and aspiration.

abdominal imaging	32
anastomosis	12
aspiration	25
catheterization	25
CT scan	14
diagnostic procedures	15
doctor visit	25
gastrointestinal procedures	12
minimally invasive procedures	21
minor procedures	15
pleural drainage	19
thoracic (chest) imaging	12
ultrasound (sonogram)	32

Average Medicare Patient Data From 2016 - 2023

Information about Medicare patients treated by Dr. John A. Walker JR., MD.

**Gender**
Male	116
Female	102

**Ethnicity**
Black / African American	2
Asian / Pacific Islander	0
Non-Hispanic White	89
Native American / Alaskan Native	0
Hispanic	101
Other	0

**Age**
75 to 84	27
85 and over	8
Less than 65	80
65 to 74	87

Average of Total of Conditions of Medicare patients treated by Dr. John A. Walker JR., MD From 2016 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. John A. Walker JR., MD treated were hypertension, chronic kidney disease, high cholesterol and diabetes.

Hypertension	75
High Cholesterol	63
Stroke	10
Ischemic Heart Disease	43
Depression	33
Chronic Kidney Disease	68
Asthma	11
Osteoporosis	8
Heart Failure	31
Chronic Obstructive Pulmonary Disease	18
Diabetes	55
Atrial Fibrillation	13
Cancer	19
Dementia	15

Education & Training

Dr. John A. Walker JR., MD graduated from University of Texas Health Science Center at San Antonio, School of Medicine in 2007. He completed residency at University of Texas Affiliated Hospitals. He is certified by the American Board of Radiology/Vascular & Interventional Radiology American Board of Radiology and has a state license in Texas.

Medical School: University of Texas Health Science Center at San Antonio, School of Medicine (2007)

Residency: University of Texas Affiliated Hospitals (2015)

Board Certification: American Board of Radiology/Vascular & Interventional Radiology American Board of Radiology

Licensed In: Texas

Affiliations & Hospitals

Dr. John A. Walker JR., MD is associated with these hospitals and organizations:

UT Health San Antonio

University Health

THE UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT SAN ANTONIO

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. John A. Walker JR., MD appears to accept the following insurance providers: MultiPlan, Prime Health, Magellan Health Services, United Healthcare PPO, United Healthcare POS, United Healthcare HMO, United Healthcare EPO, Humana HMO, Galaxy Health Network, TRICARE, Community Care Network (CCN), Aetna EPO, Trustmark , Aetna PPO, Aetna HMO, Coventry HMO, BlueCross BlueShield of Texas, Medicare Advantage, TriWest, Three Rivers Provider Network PPO, Coventry PPO, Coventry Workers' Compensation, HealthSpring, United Healthcare, Medicaid, Humana, Cigna, Molina Healthcare, First Health, WellPoint, HealthSmart, Humana PPO, Superior Health Plan, Private Healthcare Systems (PHCS), OptumHealth - Transplant ONLY, Zelis - Commercial, Group and Pension Administrators - GPA, CHAMPVA - Governmental, Curative - Commercial, Administrative Concepts - Commercial, Scott & White Health Plan - HMO, Ancira Enterprises, Point Comfort Underwriters (PCU) - Refugee Medical Assistance, Entrust - TPA, Aetna - Transplant ONLY, Tokio Marine - Transplant, 6 Degrees - Transplant, SANA Benefits - Commercial, Aetna - Commercial/Exchange (IFP), Aetna - MC Advantage, Oscar - Commercial Exchange, Velocity National Provider Network - Commercial PPO, Medicare (Traditional) - Medicare, Scott & White Health Plan - PPO, HMA LLC - Commercial, EBSO - TPA, University of Incarnate Word (Gilsbar) - Direct Employer, Independent Medical Systems (IMS) - PPO, Universal Benefits Consortium - Brokerage Firm (School Districts), Gilsbar - Commercial, Injury Management Organization - Workers Compensation, 90 Degree Benefits - Commercial, Allied Benefit Systems, Imagine 360 - Commercial, Interlink - Transplant, Point Comfort Underwriters (PCU) - Unaccompanied Children, Velocity National Provider Network - Wrap Network, Allegiance - Universal Benefits Consortium, Imperial Health - Commercial/Exchange, WebTPA - Commercial, Insurance Accepted, Aetna - Smart Care EPO, Veterans Administration - Governmental, Provider Network of America (PNOA) - Commercial, Century Healthcare - Commercial, Ancira Enterprises - Direct Employer, Benefit Administrative Systems and LifeTrac - Transplant.

Insurance Accepted by Provider includes:

According to our sources, Dr. John A. Walker JR., MD accepts the following insurance providers:

MultiPlan

Prime Health

Magellan Health Services

United Healthcare PPO

United Healthcare POS

United Healthcare HMO

United Healthcare EPO

Humana HMO

Galaxy Health Network

TRICARE

Community Care Network (CCN)

Aetna EPO

Trustmark

Aetna PPO

Aetna HMO

Coventry HMO

BlueCross BlueShield of Texas

Medicare Advantage

TriWest

Three Rivers Provider Network PPO

Coventry PPO

Coventry Workers' Compensation

HealthSpring

United Healthcare

Medicaid

Humana

Cigna

Molina Healthcare

First Health

WellPoint

HealthSmart

Humana PPO

Superior Health Plan

Private Healthcare Systems (PHCS)

OptumHealth - Transplant ONLY

Zelis - Commercial

Group and Pension Administrators - GPA

CHAMPVA - Governmental

Curative - Commercial

Administrative Concepts - Commercial

Scott & White Health Plan - HMO

Ancira Enterprises

Point Comfort Underwriters (PCU) - Refugee Medical Assistance

Entrust - TPA

Aetna - Transplant ONLY

Tokio Marine - Transplant

6 Degrees - Transplant

SANA Benefits - Commercial

Aetna - Commercial/Exchange (IFP)

Aetna - MC Advantage

Oscar - Commercial Exchange

Velocity National Provider Network - Commercial PPO

Medicare (Traditional) - Medicare

Scott & White Health Plan - PPO

HMA LLC - Commercial

EBSO - TPA

University of Incarnate Word (Gilsbar) - Direct Employer

Independent Medical Systems (IMS) - PPO

Universal Benefits Consortium - Brokerage Firm (School Districts)

Gilsbar - Commercial

Injury Management Organization - Workers Compensation

90 Degree Benefits - Commercial

Allied Benefit Systems

Imagine 360 - Commercial

Interlink - Transplant

Point Comfort Underwriters (PCU) - Unaccompanied Children

Velocity National Provider Network - Wrap Network

Allegiance - Universal Benefits Consortium

Imperial Health - Commercial/Exchange

WebTPA - Commercial

Insurance Accepted

Aetna - Smart Care EPO

Veterans Administration - Governmental

Provider Network of America (PNOA) - Commercial

Century Healthcare - Commercial

Ancira Enterprises - Direct Employer

Benefit Administrative Systems

LifeTrac - Transplant

Ratings & Reviews

Dr. John A. Walker JR., MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 9 ratings. We collect ratings and reviews of Dr. John A. Walker JR., MD from all over the web to help you find the right in San Antonio, TX.

Overall Rating

(9 Ratings)

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General Payments

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

**Payments by Company**
GUERBET LLC	$10,000 Lipiodol $10,000
ARGON MEDICAL DEVICES, INC.	$3,500 TLAB $3,500
Shionogi Inc	$3,244 Mulpleta $3,244
Sirtex Medical Inc	$1,440 LAVA LES (Liquid Embolic System) $1,401	SIR-Spheres microspheres $39
Biocompatibles, Inc.	$919 THERASPHERE - BIO $919
Other	$2,338 TheraSphere Y90 Glass Microspheres 10 GBq $287	Rosch-Uchida $230	KYPHON EXPRESS II KYPHOPAK TRAY $173	CT THROMBECTOMY SYSTEM KIT $163	Cook Medical Embolization $153	Other $1,332

**Types of Payments**
Consulting Fee	$13,225
Honoraria	$3,500
Food and Beverage	$2,556
Travel and Lodging	$2,160

Research Payments

Dr. John A. Walker JR., MD has received 2 research payments totaling $2,727.

Biography

Dr. John Walker is an interventional radiology/diagnostic radiology (IR/DR) and diagnostic radiology specialist in San Antonio, TX. Dr. Walker obtained his medical school training at the University of Texas Health Science Center at San Antonio, School of Medicine and performed his residency at a hospital affiliated with the University of Texas. Clinical interests for Dr. Walker include pituitary disorders, atherosclerosis, and venous insufficiency. He is rated 5.0 stars (out of 5) by his patients. He takes Aetna EPO, Blue California, and HealthSmart, in addition to other insurance carriers. Dr. Walker's professional affiliations include UT Health San Antonio and the University Health. According to UT Health San Antonio, new patients are welcome to contact his office in San Antonio, TX.