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Home > OR Providers > Neurosurgeons

Dr. Mark Gregory Belza, MD

(2 Ratings)

Specializes in: Neurosurgery

University of Nevada School of Medicine (1983)

1501 Ne Medical Center Drive
Bend, OR 97701

(541) 389-4200

Dr. Mark Gregory Belza, MD is a neurosurgeon in Bend, OR specializing in neurosurgery. He graduated from University of Nevada School of Medicine in 1983 and has 43 years of experience. Dr. Mark Gregory Belza, MD is affiliated with BEND MEMORIAL CLINIC PC.

Office Locations

1501 Ne Medical Center Drive
Bend, OR 97701

(541) 389-4200

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Noteworthy Medicare Patient Procedures Performed by Dr. Mark Gregory Belza, MD in 2023

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

Top 5%

By Volume:

anterior cervical discectomy and fusion

cervical spine surgery

discectomy

spinal decompression surgery

spinal fusion

In 2023, Dr. Mark Gregory Belza, MD performed more anterior cervical discectomy and fusion (ACDF), cervical spine surgery, discectomy (disc removal surgery), spinal decompression surgery, and spinal fusion procedures for Medicare patients than 95% of providers in related specialties within Oregon.

Top 25%

By Volume:

decompression surgery

In 2012, Dr. Mark Gregory Belza, MD performed more decompression surgery procedures for Medicare patients than 75% of providers in related specialties within Oregon.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2012 were spinal procedures, nerve block, pain management and injections.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

decompression surgery	11
doctor visit	500
injections	17
nerve block	17
nerve procedures	11
pain management	17
spinal procedures	28

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

doctor visit	134

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	67
Female	62

**Age**
From 65 to 74	63
From 75 to 84	31
85 and over	11
Less than 65	24

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2013

Hypertension	60
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	27
Depression	29
Chronic Kidney Disease	10
Asthma	10
Osteoperosis	10
Atrial Fibrilation	0
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	0
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2014 were nerve block, pain management, hospital care and inpatient care.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

doctor visit	413
hospital care	21
injections	21
inpatient care	21
nerve block	21
pain management	21
spinal procedures	21

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	110
Female	118

**Ethnicity**
Non-Hispanic White	213
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	93
From 75 to 84	65
85 and over	20
Less than 65	50

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2014

Hypertension	63
High Cholesterol	48
Stroke	8
Ischemic Heart Disease	31
Depression	30
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	11
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	13
Diabetes	28
Dementia	8
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2015 were spinal procedures, nerve block, pain management and injections.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

doctor visit	280
injections	36
nerve block	36
pain management	36
spinal procedures	52

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	224
Female	238

**Ethnicity**
Non-Hispanic White	426
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	188
From 75 to 84	124
85 and over	40
Less than 65	110

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2015

Hypertension	60
High Cholesterol	46
Stroke	10
Ischemic Heart Disease	27
Depression	32
Chronic Kidney Disease	20
Asthma	10
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	11
Chronic Obstructive Pulmonary Disease	16
Diabetes	25
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2016 were inpatient care, hospital care, spinal procedures and nerve block.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

arthrodesis (bone fusion surgery)	12
decompression surgery	12
doctor visit	283
hospital care	91
implant surgery	14
injections	17
inpatient care	91
neck surgery	12
nerve block	17
nerve procedures	12
neurostimulator lead placement	14
neurostimulator replacement	14
pain management	17
spinal procedures	74

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	119
Female	122

**Ethnicity**
Non-Hispanic White	230
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	23
Less than 65	48

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2016

Hypertension	62
High Cholesterol	54
Stroke	9
Ischemic Heart Disease	32
Depression	35
Chronic Kidney Disease	30
Asthma	24
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	15
Chronic Obstructive Pulmonary Disease	19
Diabetes	27
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2017 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

decompression surgery	12
doctor visit	398
hospital care	70
inpatient care	70
nerve procedures	12
spinal procedures	12

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	120
Female	141

**Ethnicity**
Non-Hispanic White	244
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	116
From 75 to 84	78
85 and over	18
Less than 65	49

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2017

Hypertension	70
High Cholesterol	54
Stroke	11
Ischemic Heart Disease	31
Depression	31
Chronic Kidney Disease	28
Asthma	9
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	16
Diabetes	32
Dementia	10
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2018 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

decompression surgery	17
doctor visit	370
hospital care	54
inpatient care	54
nerve procedures	17
spinal procedures	17

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	116
Female	133

**Ethnicity**
Non-Hispanic White	231
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	72
85 and over	16
Less than 65	51

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2018

Hypertension	61
High Cholesterol	46
Stroke	8
Ischemic Heart Disease	31
Depression	32
Chronic Kidney Disease	26
Asthma	8
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	16
Diabetes	27
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2019 were spinal procedures, hospital care, inpatient care and nerve procedures.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

arthrodesis (bone fusion surgery)	19
decompression surgery	19
doctor visit	292
hospital care	46
inpatient care	46
neck surgery	19
nerve procedures	19
spinal procedures	69

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	112
Female	118

**Ethnicity**
Non-Hispanic White	212
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	95
From 75 to 84	79
85 and over	14
Less than 65	42

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2019

Hypertension	66
High Cholesterol	53
Stroke	7
Ischemic Heart Disease	34
Depression	39
Chronic Kidney Disease	30
Asthma	10
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	18
Diabetes	27
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2020 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

decompression surgery	15
doctor visit	319
hospital care	16
inpatient care	16
nerve procedures	15
spinal procedures	15

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	117
Female	139

**Ethnicity**
Non-Hispanic White	240
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	86
85 and over	25
Less than 65	41

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2020

Hypertension	61
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	38
Depression	33
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	16
Chronic Obstructive Pulmonary Disease	17
Diabetes	28
Dementia	9
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2021 were hospital care, inpatient care, nerve procedures and decompression surgery.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

decompression surgery	12
doctor visit	581
hospital care	50
inpatient care	50
nerve procedures	12
spinal procedures	12

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	198
Female	197

**Ethnicity**
Non-Hispanic White	359
Black	0
Hispanic	17
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	179
From 75 to 84	125
85 and over	39
Less than 65	52

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2021

Hypertension	63
High Cholesterol	57
Stroke	5
Ischemic Heart Disease	34
Depression	31
Chronic Kidney Disease	29
Asthma	8
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	14
Chronic Obstructive Pulmonary Disease	15
Diabetes	25
Dementia	10
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR during 2022 were spinal procedures, nerve procedures, decompression surgery and hospital care.

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

arthrodesis (bone fusion surgery)	11
decompression surgery	26
doctor visit	515
hospital care	13
inpatient care	13
neck surgery	11
nerve procedures	26
spinal procedures	38

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	148
Female	170

**Ethnicity**
Non-Hispanic White	298
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	150
From 75 to 84	111
85 and over	25
Less than 65	32

Conditions of Medicare patients treated by Dr. Mark Gregory Belza, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	31
Depression	34
Chronic Kidney Disease	21
Asthma	15
Osteoperosis	23
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	20
Diabetes	30
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark Gregory Belza, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark Gregory Belza, MD treated as a neurosurgeon in Bend, OR were inpatient care, hospital care, spinal procedures and nerve block.

arthrodesis (bone fusion surgery)	14
decompression surgery	15
doctor visit	371
hospital care	45
implant surgery	14
injections	22
inpatient care	45
neck surgery	14
nerve block	22
nerve procedures	15
neurostimulator lead placement	14
neurostimulator replacement	14
pain management	22
spinal procedures	33

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark Gregory Belza, MD.

**Gender**
Male	121
Female	130

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	223
Hispanic	1
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	76
85 and over	21
Less than 65	45
65 to 74	108

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

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

Hypertension	58
High Cholesterol	48
Stroke	7
Ischemic Heart Disease	28
Depression	29
Chronic Kidney Disease	22
Asthma	10
Osteoporosis	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	14
Diabetes	25
Atrial Fibrillation	9
Cancer	9
Dementia	6

Education & Training

Dr. Mark Gregory Belza, MD graduated from University of Nevada School of Medicine in 1983. He has a state license in Oregon.

Medical School: University of Nevada School of Medicine (1983)

Licensed In: Oregon

Affiliations & Hospitals

Dr. Mark Gregory Belza, MD is associated with these hospitals and organizations:

BEND MEMORIAL CLINIC PC

Ratings & Reviews

Dr. Mark Gregory Belza, MD has an average of 1.0 out of 5 stars based on 2 ratings. We collect ratings and reviews of Dr. Mark Gregory Belza, MD from all over the web to help you find the right in Bend, OR.

Overall Rating

(2 Ratings)

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General Payments

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

**Payments by Company**
Providence Medical Technology, Inc.	$6,295 BIOLOGIX Allograft Bone $4,295	$2,000
LDR SPINE USA, INC	$4,073 Spinal Implant $4,073
Globus Medical, Inc.	$2,144 FORTIFY $629	CREO $463	Excelsius Robotics System $374	XTEND $284	Excelsius - GPS $215	Other $179
Boston Scientific Corporation	$1,641 PAIN MANAGEMENT $1,178	GENERAL - PAIN MANAGEMENT $130	SPECTRA SYSTEM $85	SPECTRA WAVEWRITER $41	GENERAL PAIN MANAGEMENT $36	Other $171
NUVASIVE, INC.	$1,550 Thoracolumbar $1,048	Integrated Operative Solutions $89	Pulse $84	iGA $67	Biologics $18	Other $244
Other	$6,062 activL Artificial Disc $1,372	iFuse Implant $1,220	INTERVENTIONAL SPINE $864	BARRICAID ACD (ANNULAR CLOSURE DEVICE) $210	Senza Spinal Cord Stimulation System $192	Other $2,203