In 2012, Dr. Mark M. Theiss, MD had a list price for hip replacement, hip surgery, and total joint replacement that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Virginia. 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. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2012 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	296
doctor visit	566
hip imaging	110
injections	312
joint surgery	18
lower extremity surgery	18
musculoskeletal imaging	177
pain management	16
reconstructive surgery	18
X-rays	177

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2013 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	264
doctor visit	426
hip imaging	57
injections	264
joint surgery	11
lower extremity surgery	11
musculoskeletal imaging	98
pelvic imaging	16
reconstructive surgery	11
X-rays	114

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	117
Female	167

**Ethnicity**
Non-Hispanic White	250
Black	15
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	95
85 and over	36
Less than 65	17

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2013

Hypertension	63
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	28
Depression	16
Chronic Kidney Disease	14
Asthma	10
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	10
Chronic Obstructive Pulmonary Disease	8
Diabetes	21
Dementia	6
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2014 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	149
doctor visit	323
hip imaging	44
injections	149
musculoskeletal imaging	214
pelvic imaging	51
X-rays	265

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	94
Female	141

**Ethnicity**
Non-Hispanic White	206
Black	0
Hispanic	0
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	118
From 75 to 84	74
85 and over	30
Less than 65	13

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2014

Hypertension	61
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	18
Asthma	9
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	9
Chronic Obstructive Pulmonary Disease	6
Diabetes	20
Dementia	7
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2015 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	183
doctor visit	378
hip imaging	38
injections	183
musculoskeletal imaging	232
pelvic imaging	50
X-rays	282

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	196
Female	290

**Ethnicity**
Non-Hispanic White	394
Black	38
Hispanic	0
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	196
From 75 to 84	206
85 and over	50
Less than 65	34

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2015

Hypertension	67
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	23
Depression	16
Chronic Kidney Disease	13
Asthma	11
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	9
Chronic Obstructive Pulmonary Disease	7
Diabetes	23
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2016 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	104
doctor visit	355
injections	104
joint surgery	29
lower extremity surgery	29
musculoskeletal imaging	130
reconstructive surgery	29
X-rays	130

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	71
Female	133

**Ethnicity**
Non-Hispanic White	166
Black	0
Hispanic	0
Asian	11
Other	11
Native American	0

**Age**
From 65 to 74	87
From 75 to 84	76
85 and over	26
Less than 65	15

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2016

Hypertension	71
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	25
Depression	20
Chronic Kidney Disease	23
Asthma	13
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	25
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2017 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	142
doctor visit	405
injections	142
joint surgery	17
lower extremity surgery	17
musculoskeletal imaging	90
reconstructive surgery	17
X-rays	90

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	95
Female	154

**Ethnicity**
Non-Hispanic White	204
Black	12
Hispanic	0
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	112
From 75 to 84	96
85 and over	23
Less than 65	18

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2017

Hypertension	63
High Cholesterol	51
Stroke	6
Ischemic Heart Disease	30
Depression	14
Chronic Kidney Disease	22
Asthma	10
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	12
Chronic Obstructive Pulmonary Disease	7
Diabetes	23
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2018 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	124
doctor visit	463
injections	124
musculoskeletal imaging	101
X-rays	101

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	151
Female	233

**Ethnicity**
Non-Hispanic White	296
Black	23
Hispanic	18
Asian	29
Other	18
Native American	0

**Age**
From 65 to 74	188
From 75 to 84	121
85 and over	47
Less than 65	28

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2018

Hypertension	62
High Cholesterol	58
Stroke	4
Ischemic Heart Disease	27
Depression	17
Chronic Kidney Disease	28
Asthma	8
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	25
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2019 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	121
doctor visit	436
injections	121
joint surgery	34
lower extremity surgery	34
musculoskeletal imaging	48
reconstructive surgery	34
X-rays	48

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	154
Female	237

**Ethnicity**
Non-Hispanic White	291
Black	29
Hispanic	22
Asian	28
Other	21
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	138
85 and over	53
Less than 65	24

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2019

Hypertension	69
High Cholesterol	64
Stroke	0
Ischemic Heart Disease	32
Depression	18
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	16
Chronic Obstructive Pulmonary Disease	9
Diabetes	26
Dementia	12
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2020 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	127
doctor visit	320
injections	127
joint surgery	27
lower extremity surgery	27
musculoskeletal imaging	38
reconstructive surgery	27
X-rays	38

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	110
Female	162

**Ethnicity**
Non-Hispanic White	204
Black	11
Hispanic	18
Asian	12
Other	27
Native American	0

**Age**
From 65 to 74	141
From 75 to 84	98
85 and over	21
Less than 65	12

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2020

Hypertension	64
High Cholesterol	60
Stroke	7
Ischemic Heart Disease	30
Depression	17
Chronic Kidney Disease	22
Asthma	4
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	14
Chronic Obstructive Pulmonary Disease	5
Diabetes	24
Dementia	11
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2021 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	157
doctor visit	434
injections	157
joint surgery	34
lower extremity surgery	34
musculoskeletal imaging	51
reconstructive surgery	34
X-rays	51

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	108
Female	175

**Ethnicity**
Non-Hispanic White	224
Black	19
Hispanic	12
Asian	15
Other	13
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	110
85 and over	35
Less than 65	13

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2021

Hypertension	68
High Cholesterol	63
Stroke	4
Ischemic Heart Disease	31
Depression	20
Chronic Kidney Disease	29
Asthma	8
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	18
Chronic Obstructive Pulmonary Disease	10
Diabetes	26
Dementia	16
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA during 2022 were aspiration, injections, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

aspiration	179
doctor visit	535
injections	179
joint surgery	40
lower extremity surgery	40
musculoskeletal imaging	56
reconstructive surgery	40
X-rays	56

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	112
Female	204

**Ethnicity**
Non-Hispanic White	215
Black	34
Hispanic	24
Asian	21
Other	22
Native American	0

**Age**
From 65 to 74	143
From 75 to 84	124
85 and over	34
Less than 65	15

Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	25
Depression	19
Chronic Kidney Disease	20
Asthma	11
Osteoperosis	17
Atrial Fibrilation	18
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	24
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark M. Theiss, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark M. Theiss, MD treated as a sports medicine doctor in FAIRFAX, VA were injections, aspiration, X-rays and musculoskeletal imaging.

aspiration	167
doctor visit	421
hip imaging	62
injections	169
joint surgery	26
lower extremity surgery	26
musculoskeletal imaging	112
pain management	16
pelvic imaging	39
reconstructive surgery	26
X-rays	122

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark M. Theiss, MD.

**Gender**
Male	109
Female	172

**Ethnicity**
Black / African American	16
Asian / Pacific Islander	15
Non-Hispanic White	222
Native American / Alaskan Native	0
Hispanic	8
Other	10

**Age**
75 to 84	103
85 and over	32
Less than 65	17
65 to 74	129

Average of Total of Conditions of Medicare patients treated by Dr. Mark M. Theiss, MD From 2012 - 2022

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

Hypertension	60
High Cholesterol	56
Stroke	2
Ischemic Heart Disease	25
Depression	15
Chronic Kidney Disease	19
Asthma	8
Osteoporosis	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	7
Diabetes	21
Atrial Fibrillation	12
Dementia	8
Cancer	10

Education & Training

He completed residency at Georgetown University Medical Center. He is certified by the American Board of Orthopaedic Surgery and has a state license in Virginia.

Residency: Georgetown University Medical Center

Board Certification: American Board of Orthopaedic Surgery

Licensed In: Virginia

Ratings & Reviews

Dr. Mark M. Theiss, MD has an exceptional overall rating with an average of 4.71 out of 5 stars based on 7 ratings. We collect ratings and reviews of Dr. Mark M. Theiss, MD from all over the web to help you find the right in FAIRFAX, VA.

4.71

Overall Rating

(7 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-07-24

Patient verified via Press Ganey

Dr.Thesis is wonderful he cares about your overall health he isn't a doctor who tries to rush you into surgery he makes sure to do everything in his power not to cut on you for example physical therapy, pain management, weight loss an I love that because I am really nervous about getting a total hip replacement at 45 yrs old because I am still kinda young an I have other health issues that play a role Dr.Thesis cares about that as well

Overall Rating: 5.0 2025-07-13

Patient verified via Press Ganey

I think Dr Theiss is remarkably astute and is very talented in his ability to put any anxiety to rest

Overall Rating: 5.0 2025-06-29

Patient verified via Press Ganey

Dr. Theiss is the BEST of the BEST. Excellent in all aspects of his care.

Overall Rating: 5.0 2025-10-11

Patient verified via Press Ganey

Dr Theiss was wonderful!

Overall Rating: 3.0 2025-04-19

Patient verified via Press Ganey

Good

General Payments

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

**Payments by Company**
MicroPort Orthopedics Inc	$1,935 HIPS $1,817	MPO Hip System $117
Zimmer Biomet Holdings, Inc.	$671 Connected Health Product Portfolio $135	AccuFill $119	Trauma $97	ICI Bone Substitutes $80	DVR Crosslock Plates/Screws/Pegs $15	Other $224
Stryker Corporation	$184 TRAUMA & EXTREMITIES $184
St. Jude Medical, Inc.	$155 Neuro-Chronic Pain $155
ENCORE MEDICAL, LP	$148 DJO Surgical Empowr Knee System $148
Other	$771 CERAMENTBONE VOID FILLER $148	Exparel $146	Ortho-Knees $107	PREVENA $96	Stimulan $84	Other $190

**Types of Payments**
Food and Beverage	$2,027
Travel and Lodging	$1,691
Education	$146

Biography

Dr. Mark Theiss practices orthopedics/orthopedic surgery and sports medicine. Patients rated him highly, giving him an average of 4.5 stars (out of 5). His education and training includes medical school at Georgetown University School of Medicine and residency at Georgetown University Medical Center. Doctor.com reports that Dr. Theiss is accepting new patients at his office in Fairfax, VA.