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Dr. John David Knight, MD

Accepting New Patients

(46 Ratings)

Specializes in: Internal Medicine (Adult Medicine) and General Pediatrics

University of Texas Medical School at Houston (1992)

Professional interests include: back pain, pain, fever, and more.

100 Medical Center Parkway
Huntsville, TX 77340

(936) 295-8000

Dr. John David Knight, MD is an internist in Huntsville, TX specializing in internal medicine (adult medicine) and general pediatrics. He graduated from University of Texas Medical School at Houston in 1992 and has 34 years of experience. Dr. John David Knight, MD is affiliated with Kelsey-Seybold Clinic and KELSEY-SEYBOLD MEDICAL GROUP, PLLC.

Office Locations

100 Medical Center Parkway
Huntsville, TX 77340

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Some issues Dr. John David Knight, MD can help you with:

Heart Problems

The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.

Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.

Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.

Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.

Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.

Urinary Tract Infection (UTI)

A urinary tract infection, or UTI, happens when bacteria enter the body through the opening where urine is normally released. The bacteria infect the lining of the urethra and bladder, turning them red and inflamed. This causes pain in the abdomen or pelvic area, a burning sensation during urination, a sense of urgency about going to the bathroom, frequent urination, and urine that smells bad and looks cloudy, or even contains traces of blood. If the urinary tract infection is severe, it may travel all the way to the kidneys, a more serious kind of UTI called pyelonephritis. Patients with this kidney infection might have blood in their urine, feel back pain, and develop a fever.

Urinary tract infections are extremely common: 12% of all men and 40-50% of all women will have a urinary tract infection during their lifetime. They are more common in women because women have shorter urethras, so bacteria have a shorter distance to travel from the outside of the body to the bladder and cause an infection. Some people also have urethras that are an unusual shape or have an obstruction in the urethra that makes getting a UTI more likely. Also, certain chronic illnesses like diabetes weaken the immune system, so any bacteria in the body are more likely to cause an infection.

A urinary tract infection can be diagnosed very quickly by a doctor. A sample of urine can be examined under a microscope for the presence of bacteria or white blood cells. There are also diagnostic strips that can be used to test a urine sample without the need for a microscope. Once a diagnosis is made, treatment is a course of oral antibiotics, and most patients feel better within just a few days. There are some things that patients can do themselves to help reduce the risk of getting a urinary tract infection in the future. Stay well hydrated, wipe from front to back after going to the bathroom, wear breathable cotton undergarments, and don't hold it in when patients feel the urge to go.

Noteworthy Medicare Patient Procedures Performed by Dr. John David Knight, MD in 2023

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

Top 10%

By Affordability:

lab tests

In 2023, Dr. John David Knight, MD had a list price for lab tests 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 Affordability:

urine tests

In 2012, Dr. John David Knight, MD had a list price for urine tests that was lower than the list prices billed to Medicare by 75% 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.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2012 were lab tests, preventive care, diabetes management and X-rays.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	71
doctor visit	690
lab tests	243
preventive care	121
thoracic (chest) imaging	51
vaccines	50
X-rays	51

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2013 were lab tests, preventive care, vaccines and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	48
doctor visit	632
lab tests	227
preventive care	114
thoracic (chest) imaging	41
vaccines	66
X-rays	41

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	81
Female	140

**Ethnicity**
Non-Hispanic White	205
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	112
From 75 to 84	73
85 and over	19
Less than 65	17

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2013

Hypertension	67
High Cholesterol	37
Stroke	8
Ischemic Heart Disease	38
Depression	18
Chronic Kidney Disease	14
Asthma	7
Osteoperosis	5
Atrial Fibrilation	11
Heart Failure	19
Chronic Obstructive Pulmonary Disease	19
Diabetes	32
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2014 were lab tests, preventive care, vaccines and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	58
doctor visit	593
lab tests	171
preventive care	104
thoracic (chest) imaging	48
vaccines	64
X-rays	48

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	85
Female	135

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

**Age**
From 65 to 74	98
From 75 to 84	80
85 and over	18
Less than 65	24

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2014

Hypertension	55
High Cholesterol	31
Stroke	5
Ischemic Heart Disease	35
Depression	13
Chronic Kidney Disease	11
Asthma	6
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	16
Chronic Obstructive Pulmonary Disease	18
Diabetes	31
Dementia	8
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2015 were preventive care, lab tests, vaccines and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	60
doctor visit	583
lab tests	140
preventive care	158
thoracic (chest) imaging	47
vaccines	118
X-rays	47

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	170
Female	262

**Ethnicity**
Non-Hispanic White	408
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	192
From 75 to 84	162
85 and over	38
Less than 65	40

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2015

Hypertension	56
High Cholesterol	36
Stroke	0
Ischemic Heart Disease	36
Depression	15
Chronic Kidney Disease	18
Asthma	13
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	17
Diabetes	34
Dementia	7
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2016 were preventive care, lab tests, vaccines and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	44
doctor visit	457
lab tests	78
preventive care	105
thoracic (chest) imaging	34
vaccines	74
X-rays	34

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	82
Female	118

**Ethnicity**
Non-Hispanic White	187
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	88
From 75 to 84	73
85 and over	21
Less than 65	18

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2016

Hypertension	61
High Cholesterol	41
Stroke	0
Ischemic Heart Disease	36
Depression	17
Chronic Kidney Disease	29
Asthma	18
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	36
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2017 were preventive care, lab tests, vaccines and X-rays.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	39
doctor visit	491
lab tests	145
preventive care	164
thoracic (chest) imaging	45
vaccines	124
X-rays	45

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	90
Female	120

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

**Age**
From 65 to 74	97
From 75 to 84	74
85 and over	22
Less than 65	17

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2017

Hypertension	60
High Cholesterol	36
Stroke	8
Ischemic Heart Disease	36
Depression	19
Chronic Kidney Disease	32
Asthma	10
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	16
Chronic Obstructive Pulmonary Disease	15
Diabetes	36
Dementia	9
Cancer	5

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2018 were preventive care, vaccines, lab tests and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	12
doctor visit	445
lab tests	92
preventive care	150
vaccines	106

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	80
Female	120

**Ethnicity**
Non-Hispanic White	185
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	72
85 and over	20
Less than 65	15

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2018

Hypertension	63
High Cholesterol	37
Stroke	6
Ischemic Heart Disease	38
Depression	17
Chronic Kidney Disease	33
Asthma	10
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	17
Chronic Obstructive Pulmonary Disease	17
Diabetes	37
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2019 were preventive care, vaccines, lab tests and diabetes management.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

diabetes management	11
doctor visit	457
lab tests	42
preventive care	66
vaccines	55

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	79
Female	111

**Ethnicity**
Non-Hispanic White	176
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	90
From 75 to 84	66
85 and over	23
Less than 65	11

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2019

Hypertension	58
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	31
Depression	18
Chronic Kidney Disease	31
Asthma	6
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	16
Diabetes	37
Dementia	7
Cancer	6

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2020 were preventive care and vaccines.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

doctor visit	400
preventive care	56
vaccines	56

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	70
Female	112

**Age**
From 65 to 74	93
From 75 to 84	63
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2020

Hypertension	65
High Cholesterol	41
Stroke	0
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	29
Asthma	9
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	13
Diabetes	34
Dementia	7
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2021 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

doctor visit	498
lab tests	12
preventive care	32
vaccines	32

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	73
Female	120

**Ethnicity**
Non-Hispanic White	177
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	94
From 75 to 84	64
85 and over	23
Less than 65	12

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2021

Hypertension	64
High Cholesterol	38
Stroke	0
Ischemic Heart Disease	28
Depression	15
Chronic Kidney Disease	34
Asthma	7
Osteoperosis	0
Atrial Fibrilation	9
Heart Failure	16
Chronic Obstructive Pulmonary Disease	12
Diabetes	34
Dementia	8
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX during 2022 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

doctor visit	507
lab tests	21
preventive care	35
vaccines	35

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	68
Female	108

**Ethnicity**
Non-Hispanic White	161
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	82
From 75 to 84	63
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John David Knight, MD in 2022

Hypertension	75
High Cholesterol	61
Stroke	10
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	17
Asthma	10
Osteoperosis	0
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	18
Diabetes	34
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John David Knight, MD for Medicare patients.

The highest averages for the top procedures that Dr. John David Knight, MD treated as an internist in Huntsville, TX were lab tests, preventive care, vaccines and X-rays.

diabetes management	42
doctor visit	523
lab tests	117
preventive care	100
thoracic (chest) imaging	44
vaccines	70
X-rays	44

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John David Knight, MD.

**Gender**
Male	79
Female	122

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	172
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	71
85 and over	16
Less than 65	14
65 to 74	94

Average of Total of Conditions of Medicare patients treated by Dr. John David Knight, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. John David Knight, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	56
High Cholesterol	36
Stroke	3
Ischemic Heart Disease	30
Depression	15
Chronic Kidney Disease	22
Asthma	8
Osteoporosis	0
Heart Failure	14
Chronic Obstructive Pulmonary Disease	14
Diabetes	31
Atrial Fibrillation	9
Cancer	6
Dementia	7

Education & Training

Dr. John David Knight, MD graduated from University of Texas Medical School at Houston in 1992. He completed residency at St. Joseph Medical Center, Houston. He is certified by the American Board of Internal Medicine and has a state license in Texas.

Medical School: University of Texas Medical School at Houston (1992)

Residency: St. Joseph Medical Center, Houston

Board Certification: American Board of Internal Medicine

Licensed In: Texas

Affiliations & Hospitals

Dr. John David Knight, MD is associated with these hospitals and organizations:

Kelsey-Seybold Clinic

KELSEY-SEYBOLD MEDICAL GROUP, PLLC

Ratings & Reviews

Dr. John David Knight, MD has an exceptional overall rating with an average of 4.92 out of 5 stars based on 46 ratings. We collect ratings and reviews of Dr. John David Knight, MD from all over the web to help you find the right in Huntsville, TX.

4.92

Overall Rating

(46 Ratings)

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General Payments

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

**Payments by Company**
GlaxoSmithKline, LLC.	$313 BREO $148	SHINGRIX $72	ANORO $48	ARNUITY $28	INCRUSE $17
Medtronic Vascular, Inc.	$143 Implantable Cardioverter Defibrillators - ICDs $61	Resolute $60	Pacemakers $12	Cardiac Diagnostics and Monitoring $11
SANOFI-AVENTIS U.S. LLC	$142 TOUJEO $115	APIDRA $15	SOLIQUA 100/33 $12
Philips Electronics North America Corporation	$142 iXR Undivided $82	Zoom Lamps $34	EPIQ 7C $26
Allergan Inc.	$134 DALVANCE $116	LINZESS $11	BYSTOLIC $3	NAMENDA XR $3
Other	$930 VYVANSE $111	DALVANCE $77	NovoLog $68	EUCRISA $49	AMRIX $47	Other $577

**Types of Payments**
Food and Beverage	$1,793
Education	$11

Biography

Dr. John Knight's area of specialization is general pediatrics. He is a graduate of the University of Texas Medical School at Houston. Dr. Knight's medical residency was performed at St. Joseph Medical Center, Houston. These areas are among his clinical interests: sinusitis (sinus inflammation), back pain, and heart problems. Patient reviews placed him at an average of 5.0 stars (out of 5). He is professionally affiliated with Kelsey-Seybold Clinic. Kelsey-Seybold Clinic reports that Dr. Knight is accepting new patients at his office in Huntsville, TX.