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Home > MI Providers > Diagnostic Radiologists

Dr. William K. Riordan, DO

(No ratings)

Specializes in: Diagnostic Radiology

416 Connable Avenue
Petoskey, MI 49770

(231) 487-4000

Dr. William K. Riordan, DO is a diagnostic radiologist in Petoskey, MI specializing in diagnostic radiology.

Office Locations

416 Connable Avenue
Petoskey, MI 49770

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2012 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	582
brain imaging (neuroimaging)	489
breast procedures	250
cardiac procedures	70
CT scan	1077
diagnostic imaging	48
hip imaging	131
MRI (magnetic resonance imaging)	425
musculoskeletal imaging	330
neck imaging	60
nuclear scan	86
pelvic imaging	416
preventive care	178
spinal procedures	415
stress testing	70
thoracic (chest) imaging	1288
ultrasound (sonogram)	255
vascular procedures	97
vertebral fracture assessment (VFA)	43
women's imaging	265
X-rays	1804

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2013 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	613
brain imaging (neuroimaging)	471
breast procedures	289
cardiac procedures	58
CT scan	1158
diagnostic imaging	57
hip imaging	143
MRI (magnetic resonance imaging)	377
musculoskeletal imaging	380
neck imaging	80
nuclear scan	58
pelvic imaging	476
preventive care	203
spinal procedures	404
stress testing	58
thoracic (chest) imaging	1364
ultrasound (sonogram)	323
vascular procedures	112
vertebral fracture assessment (VFA)	84
women's imaging	308
X-rays	1993

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1533
Female	2022

**Ethnicity**
Non-Hispanic White	3392
Black	0
Hispanic	14
Asian	0
Other	25
Native American	113

**Age**
From 65 to 74	1409
From 75 to 84	1067
85 and over	485
Less than 65	594

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2013

Hypertension	71
High Cholesterol	60
Stroke	8
Ischemic Heart Disease	44
Depression	31
Chronic Kidney Disease	26
Asthma	9
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	25
Chronic Obstructive Pulmonary Disease	28
Diabetes	34
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2014 were X-rays, thoracic (chest) imaging, CT scan and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	577
brain imaging (neuroimaging)	436
breast procedures	251
cardiac procedures	43
CT scan	1017
diagnostic imaging	40
hip imaging	114
MRI (magnetic resonance imaging)	360
musculoskeletal imaging	283
neck imaging	53
nuclear scan	43
pelvic imaging	442
preventive care	169
spinal procedures	350
stress testing	43
thoracic (chest) imaging	1151
ultrasound (sonogram)	302
vascular procedures	116
vertebral fracture assessment (VFA)	33
women's imaging	270
X-rays	1633

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1340
Female	1800

**Ethnicity**
Non-Hispanic White	2993
Black	0
Hispanic	0
Asian	0
Other	35
Native American	93

**Age**
From 65 to 74	1227
From 75 to 84	929
85 and over	394
Less than 65	590

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2014

Hypertension	71
High Cholesterol	61
Stroke	8
Ischemic Heart Disease	42
Depression	32
Chronic Kidney Disease	28
Asthma	9
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	24
Chronic Obstructive Pulmonary Disease	27
Diabetes	33
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2015 were X-rays, CT scan, thoracic (chest) imaging and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	506
brain imaging (neuroimaging)	443
breast procedures	282
cardiac procedures	32
CT scan	973
diagnostic imaging	47
hip imaging	120
MRI (magnetic resonance imaging)	398
musculoskeletal imaging	259
neck imaging	57
nuclear scan	32
pelvic imaging	388
preventive care	179
spinal procedures	352
stress testing	32
thoracic (chest) imaging	973
ultrasound (sonogram)	256
vascular procedures	82
women's imaging	293
X-rays	1381

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	2428
Female	3194

**Ethnicity**
Non-Hispanic White	5350
Black	0
Hispanic	24
Asian	0
Other	62
Native American	164

**Age**
From 65 to 74	2200
From 75 to 84	1566
85 and over	734
Less than 65	1122

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2015

Hypertension	71
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	42
Depression	34
Chronic Kidney Disease	31
Asthma	17
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	23
Chronic Obstructive Pulmonary Disease	27
Diabetes	33
Dementia	11
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2016 were X-rays, CT scan, thoracic (chest) imaging and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	633
brain imaging (neuroimaging)	475
breast procedures	244
cardiac procedures	57
CT scan	1185
diagnostic imaging	23
hip imaging	56
MRI (magnetic resonance imaging)	450
musculoskeletal imaging	216
neck imaging	59
nuclear scan	57
pelvic imaging	468
preventive care	181
spinal procedures	327
stress testing	57
thoracic (chest) imaging	1100
ultrasound (sonogram)	270
vascular procedures	101
women's imaging	256
X-rays	1286

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1361
Female	1794

**Ethnicity**
Non-Hispanic White	2988
Black	0
Hispanic	14
Asian	0
Other	37
Native American	105

**Age**
From 65 to 74	1219
From 75 to 84	951
85 and over	363
Less than 65	622

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2016

Hypertension	71
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	42
Depression	34
Chronic Kidney Disease	36
Asthma	30
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	23
Chronic Obstructive Pulmonary Disease	27
Diabetes	31
Dementia	13
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2017 were X-rays, CT scan, thoracic (chest) imaging and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	533
brain imaging (neuroimaging)	532
breast procedures	289
cardiac procedures	50
CT scan	1206
diagnostic imaging	48
gastrointestinal procedures	11
hip imaging	35
MRI (magnetic resonance imaging)	429
musculoskeletal imaging	197
neck imaging	70
nuclear scan	50
pelvic imaging	409
preventive care	167
spinal procedures	377
stress testing	50
thoracic (chest) imaging	1104
ultrasound (sonogram)	313
vascular procedures	100
women's imaging	300
X-rays	1315

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1279
Female	1770

**Ethnicity**
Non-Hispanic White	2882
Black	0
Hispanic	0
Asian	0
Other	33
Native American	115

**Age**
From 65 to 74	1192
From 75 to 84	871
85 and over	391
Less than 65	595

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2017

Hypertension	72
High Cholesterol	56
Stroke	8
Ischemic Heart Disease	41
Depression	34
Chronic Kidney Disease	37
Asthma	9
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	24
Chronic Obstructive Pulmonary Disease	28
Diabetes	33
Dementia	15
Cancer	14

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2018 were CT scan, abdominal imaging, brain imaging (neuroimaging) and pelvic imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	563
brain imaging (neuroimaging)	541
breast procedures	116
cardiac procedures	34
CT scan	1240
hip imaging	32
MRI (magnetic resonance imaging)	358
musculoskeletal imaging	175
neck imaging	58
nuclear scan	34
pelvic imaging	430
preventive care	116
spinal procedures	306
stress testing	34
thoracic (chest) imaging	227
ultrasound (sonogram)	196
vascular procedures	100
women's imaging	128
X-rays	290

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1173
Female	1594

**Ethnicity**
Non-Hispanic White	2585
Black	0
Hispanic	0
Asian	0
Other	47
Native American	123

**Age**
From 65 to 74	1111
From 75 to 84	817
85 and over	352
Less than 65	487

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2018

Hypertension	74
High Cholesterol	60
Stroke	9
Ischemic Heart Disease	40
Depression	37
Chronic Kidney Disease	41
Asthma	9
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	24
Chronic Obstructive Pulmonary Disease	27
Diabetes	31
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2019 were CT scan, abdominal imaging, X-rays and brain imaging (neuroimaging).

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	310
brain imaging (neuroimaging)	280
breast procedures	166
cardiac procedures	35
CT scan	738
diagnostic imaging	12
hip imaging	12
MRI (magnetic resonance imaging)	152
musculoskeletal imaging	165
neck imaging	19
nuclear scan	35
pelvic imaging	235
preventive care	139
spinal procedures	147
stress testing	35
thoracic (chest) imaging	169
ultrasound (sonogram)	157
vascular procedures	35
women's imaging	166
X-rays	281

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	831
Female	1168

**Ethnicity**
Non-Hispanic White	1862
Black	0
Hispanic	0
Asian	0
Other	36
Native American	80

**Age**
From 65 to 74	828
From 75 to 84	602
85 and over	243
Less than 65	326

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2019

Hypertension	73
High Cholesterol	60
Stroke	8
Ischemic Heart Disease	39
Depression	38
Chronic Kidney Disease	41
Asthma	8
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	25
Chronic Obstructive Pulmonary Disease	26
Diabetes	31
Dementia	14
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2020 were CT scan, abdominal imaging, pelvic imaging and brain imaging (neuroimaging).

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	263
brain imaging (neuroimaging)	229
breast procedures	117
cardiac procedures	33
CT scan	734
diagnostic imaging	30
hip imaging	16
MRI (magnetic resonance imaging)	139
musculoskeletal imaging	109
neck imaging	30
nuclear scan	33
pelvic imaging	229
preventive care	77
spinal procedures	126
stress testing	33
thoracic (chest) imaging	207
ultrasound (sonogram)	112
vascular procedures	16
women's imaging	117
X-rays	144

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	695
Female	854

**Ethnicity**
Non-Hispanic White	1451
Black	0
Hispanic	0
Asian	0
Other	29
Native American	54

**Age**
From 65 to 74	645
From 75 to 84	453
85 and over	195
Less than 65	256

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2020

Hypertension	70
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	39
Depression	34
Chronic Kidney Disease	43
Asthma	8
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	25
Chronic Obstructive Pulmonary Disease	24
Diabetes	30
Dementia	15
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2021 were CT scan, MRI (magnetic resonance imaging), brain imaging (neuroimaging) and abdominal imaging.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	256
brain imaging (neuroimaging)	257
CT scan	620
hip imaging	34
MRI (magnetic resonance imaging)	356
musculoskeletal imaging	76
neck imaging	32
pelvic imaging	225
spinal procedures	221
thoracic (chest) imaging	153
ultrasound (sonogram)	18
X-rays	16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	606
Female	671

**Ethnicity**
Non-Hispanic White	1212
Black	0
Hispanic	0
Asian	0
Other	23
Native American	28

**Age**
From 65 to 74	576
From 75 to 84	356
85 and over	149
Less than 65	196

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2021

Hypertension	68
High Cholesterol	56
Stroke	7
Ischemic Heart Disease	35
Depression	30
Chronic Kidney Disease	42
Asthma	7
Osteoperosis	7
Atrial Fibrilation	12
Heart Failure	21
Chronic Obstructive Pulmonary Disease	24
Diabetes	28
Dementia	12
Cancer	18

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI during 2022 were MRI (magnetic resonance imaging), brain imaging (neuroimaging), spinal procedures and CT scan.

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

abdominal imaging	17
brain imaging (neuroimaging)	65
CT scan	50
MRI (magnetic resonance imaging)	110
musculoskeletal imaging	18
pelvic imaging	17
spinal procedures	62
thoracic (chest) imaging	16
ultrasound (sonogram)	11
vascular procedures	11
X-rays	18

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	194
Female	215

**Ethnicity**
Non-Hispanic White	383
Black	0
Hispanic	0
Asian	0
Other	0
Native American	15

**Age**
From 65 to 74	186
From 75 to 84	128
85 and over	43
Less than 65	52

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2022

Hypertension	75
High Cholesterol	72
Stroke	9
Ischemic Heart Disease	29
Depression	31
Chronic Kidney Disease	35
Asthma	13
Osteoperosis	11
Atrial Fibrilation	20
Heart Failure	16
Chronic Obstructive Pulmonary Disease	26
Diabetes	26
Dementia	6
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. William K. Riordan, DO for Medicare patients.

The highest averages for the top procedures that Dr. William K. Riordan, DO treated as a diagnostic radiologist in Petoskey, MI were X-rays, CT scan, thoracic (chest) imaging and abdominal imaging.

abdominal imaging	441
brain imaging (neuroimaging)	383
breast procedures	222
cardiac procedures	45
CT scan	908
diagnostic imaging	38
gastrointestinal procedures	11
hip imaging	69
MRI (magnetic resonance imaging)	323
musculoskeletal imaging	200
neck imaging	51
nuclear scan	47
pelvic imaging	339
preventive care	156
spinal procedures	280
stress testing	45
thoracic (chest) imaging	704
ultrasound (sonogram)	201
vascular procedures	77
vertebral fracture assessment (VFA)	53
women's imaging	233
X-rays	923

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. William K. Riordan, DO.

**Gender**
Male	1040
Female	1371

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	2281
Native American / Alaskan Native	80
Hispanic	4
Other	29

**Age**
75 to 84	703
85 and over	304
Less than 65	440
65 to 74	963

Average of Total of Conditions of Medicare patients treated by Dr. William K. Riordan, DO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. William K. Riordan, DO treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	65
High Cholesterol	54
Stroke	7
Ischemic Heart Disease	35
Depression	30
Chronic Kidney Disease	32
Asthma	10
Osteoporosis	8
Heart Failure	20
Chronic Obstructive Pulmonary Disease	24
Diabetes	28
Atrial Fibrillation	14
Dementia	11
Cancer	13

Education & Training

He has a state license in Michigan.

Licensed In: Michigan

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. William K. Riordan, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Janssen Pharmaceuticals, Inc	$31 INVOKANA $31

**Types of Payments**
Food and Beverage	$31

Biography

Dr. William Riordan is a specialist in diagnostic radiology. He works in Petoskey, MI. Dr. Riordan has obtained a license to practice in Michigan.

Select Year:

Dr. William K. Riordan, DO

Office Locations

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. William K. Riordan, DO in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. William K. Riordan, DO From 2012 - 2022

Education & Training

Ratings & Reviews

General Payments

Biography

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