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Dr. John Mark Demay, MD

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Specializes in: Dermatology (Skin Disorders)

University of Nebraska College of Medicine

2930 Hamilton Boulevard Suite 102
Sioux City, IA 51104

(712) 277-9370

Dr. John Mark Demay, MD is a dermatologist in Sioux City, IA specializing in dermatology (skin disorders). He graduated from University of Nebraska College of Medicine. Dr. John Mark Demay, MD is affiliated with UnityPoint Health.

Office Locations

2930 Hamilton Boulevard Suite 102
Sioux City, IA 51104

(712) 277-9370

(712) 252-4733

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. John Mark Demay, MD in 2023

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

Top 5%

By Volume:

orthovoltage

By Affordability:

external beam radiation therapy

orthovoltage

radiation therapy

In 2023, among providers in related specialties within Iowa, Dr. John Mark Demay, MD performed more orthovoltage procedures for Medicare patients than 95% of them and he also had a list price for external beam radiation therapy (EBRT), orthovoltage, and radiation therapy that was lower than the list prices billed to Medicare by 95% 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

2012 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2012 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	98
doctor visit	3039
removal of lesion (e.g. growth)	1338
skin procedures	1338

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2013 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	111
doctor visit	2930
removal of lesion (e.g. growth)	1273
skin procedures	1273

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	740
Female	653

**Ethnicity**
Non-Hispanic White	1374
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	483
From 75 to 84	554
85 and over	319
Less than 65	37

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2013

Hypertension	60
High Cholesterol	53
Stroke	2
Ischemic Heart Disease	27
Depression	9
Chronic Kidney Disease	18
Asthma	5
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	22
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2014 were removal of lesion (e.g. growth), skin procedures, diagnostic procedures and ear procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	208
doctor visit	2672
ear procedures	11
removal of lesion (e.g. growth)	1134
skin procedures	1134

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	683
Female	589

**Ethnicity**
Non-Hispanic White	1253
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	474
From 75 to 84	493
85 and over	278
Less than 65	27

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2014

Hypertension	61
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	26
Depression	11
Chronic Kidney Disease	19
Asthma	4
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	21
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2015 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	124
doctor visit	2890
removal of lesion (e.g. growth)	1277
skin procedures	1277

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	1482
Female	1200

**Ethnicity**
Non-Hispanic White	2636
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	1048
From 75 to 84	1016
85 and over	570
Less than 65	48

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2015

Hypertension	61
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	27
Depression	11
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	11
Diabetes	21
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2016 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	82
doctor visit	2970
removal of lesion (e.g. growth)	1305
skin procedures	1305

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	741
Female	638

**Ethnicity**
Non-Hispanic White	1350
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	536
From 75 to 84	509
85 and over	306
Less than 65	28

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2016

Hypertension	61
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	29
Depression	13
Chronic Kidney Disease	21
Asthma	12
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	20
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2017 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	78
doctor visit	2778
removal of lesion (e.g. growth)	1161
skin procedures	1161

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	718
Female	629

**Ethnicity**
Non-Hispanic White	1315
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	545
From 75 to 84	494
85 and over	285
Less than 65	23

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2017

Hypertension	62
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	28
Depression	14
Chronic Kidney Disease	22
Asthma	4
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2018 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	169
doctor visit	2707
removal of lesion (e.g. growth)	1116
skin procedures	1116

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	715
Female	585

**Ethnicity**
Non-Hispanic White	1265
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	518
From 75 to 84	505
85 and over	253
Less than 65	24

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2018

Hypertension	60
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	28
Depression	14
Chronic Kidney Disease	25
Asthma	4
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	22
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2019 were skin procedures, removal of lesion (e.g. growth), laser treatment and phototherapy (light therapy).

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

doctor visit	2659
laser treatment	206
phototherapy (light therapy)	206
removal of lesion (e.g. growth)	1035
skin procedures	1241

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	702
Female	592

**Ethnicity**
Non-Hispanic White	1258
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	521
From 75 to 84	495
85 and over	261
Less than 65	17

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2019

Hypertension	62
High Cholesterol	54
Stroke	3
Ischemic Heart Disease	26
Depression	15
Chronic Kidney Disease	25
Asthma	4
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	21
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2020 were removal of lesion (e.g. growth) and skin procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

doctor visit	2061
removal of lesion (e.g. growth)	824
skin procedures	824

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	611
Female	501

**Ethnicity**
Non-Hispanic White	1082
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	475
From 75 to 84	418
85 and over	208
Less than 65	11

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2020

Hypertension	60
High Cholesterol	51
Stroke	2
Ischemic Heart Disease	26
Depression	14
Chronic Kidney Disease	26
Asthma	4
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	9
Diabetes	21
Dementia	5
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2021 were removal of lesion (e.g. growth) and skin procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

doctor visit	2225
removal of lesion (e.g. growth)	872
skin procedures	872

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	589
Female	481

**Ethnicity**
Non-Hispanic White	1030
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	445
From 75 to 84	414
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2021

Hypertension	63
High Cholesterol	57
Stroke	3
Ischemic Heart Disease	25
Depression	13
Chronic Kidney Disease	26
Asthma	5
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	21
Dementia	5
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2022 were radiation therapy, removal of lesion (e.g. growth) and skin procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

doctor visit	2008
radiation therapy	724
removal of lesion (e.g. growth)	703
skin procedures	703

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	549
Female	446

**Ethnicity**
Non-Hispanic White	959
Black	0
Hispanic	0
Asian	0
Other	36
Native American	0

**Age**
From 65 to 74	424
From 75 to 84	382
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2022

Hypertension	72
High Cholesterol	74
Stroke	4
Ischemic Heart Disease	21
Depression	11
Chronic Kidney Disease	23
Asthma	7
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	10
Chronic Obstructive Pulmonary Disease	13
Diabetes	21
Dementia	4
Cancer	17

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA during 2023 were radiation therapy, removal of lesion (e.g. growth), skin procedures and ear procedures.

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

diagnostic procedures	13
doctor visit	2178
ear procedures	13
radiation therapy	1617
removal of lesion (e.g. growth)	620
skin procedures	620

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Male	505
Female	451

**Ethnicity**
Non-Hispanic White	922
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	397
From 75 to 84	376
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2023

Hypertension	72
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	21
Depression	12
Chronic Kidney Disease	22
Asthma	7
Osteoperosis	15
Atrial Fibrilation	16
Heart Failure	10
Chronic Obstructive Pulmonary Disease	12
Diabetes	19
Dementia	3
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. John Mark Demay, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Mark Demay, MD treated as a dermatologist in Sioux City, IA were radiation therapy, skin procedures, removal of lesion (e.g. growth) and laser treatment.

diagnostic procedures	110
doctor visit	2593
ear procedures	12
laser treatment	206
phototherapy (light therapy)	206
radiation therapy	1170
removal of lesion (e.g. growth)	1054
skin procedures	1072

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. John Mark Demay, MD.

**Gender**
Female	563
Male	669

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	1203
Hispanic	0
Native American / Alaskan Native	0
Other	3

**Age**
85 and over	206
75 to 84	471
Less than 65	17
65 to 74	488

Average of Total of Conditions of Medicare patients treated by Dr. John Mark Demay, MD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. John Mark Demay, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	57
High Cholesterol	51
Stroke	2
Ischemic Heart Disease	23
Depression	11
Chronic Kidney Disease	20
Asthma	5
Osteoporosis	8
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	19
Atrial Fibrillation	10
Dementia	5
Cancer	11

Education & Training

Dr. John Mark Demay, MD graduated from University of Nebraska College of Medicine. He completed residency at Oregon Health & Science University Affiliated Hospitals. He is certified by the American Board of Dermatology and has a state license in Iowa.

Medical School: University of Nebraska College of Medicine

Residency: Oregon Health & Science University Affiliated Hospitals

Board Certification: American Board of Dermatology

Licensed In: Iowa

Affiliations & Hospitals

Dr. John Mark Demay, MD is associated with these hospitals and organizations:

UnityPoint Health

Ratings & Reviews

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General Payments

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

**Payments by Company**
Galderma Laboratories, L.P.	$156 SOOLANTRA $112	ORACEA $15	AKLIEF $14	$15
STRATA Skin Sciences, Inc.	$78 Dermatological Psoriasis and Vitiligo Treatment $64	XTRAC $14
Amgen Inc.	$52 Otezla $52
Sun Pharmaceutical Industries Inc.	$23 ABSORICA LD $23
Janssen Biotech, Inc.	$19 Tremfya $19
Other	$100 OPZELURA $16	DUPIXENT $16	TOPICORT (desoximetasone) Topical Spray, 0.25% $15	ALTABAX $14	NUZYRA $14	Other $24

**Types of Payments**
Food and Beverage	$412
Education	$15

Biography

Dr. John Demay is a specialist in dermatology (skin disorders) in Sioux City, IA. He attended the University of Nebraska College of Medicine and then went on to complete his residency at a hospital affiliated with Oregon Health & Science University. He is professionally affiliated with UnityPoint Health. Dr. Demay's practice in is open to new patients as reported by UnityPoint Health.

Select Year:

Dr. John Mark Demay, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. John Mark Demay, MD in 2023

By Volume:

By Affordability:

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. John Mark Demay, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John Mark Demay, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Average Medicare Patient Data From 2012 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. John Mark Demay, MD From 2012 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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