In 2012, Dr. William J Giesen, MD performed more blood draw, phlebotomy for lab tests, and urinalysis procedures for Medicare patients than 75% of providers in related specialties within Connecticut.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2012 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	151
doctor visit	399
ear procedures	21
lab tests	38

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2013 were blood draw, lab tests, ear procedures and preventive care.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	199
doctor visit	455
ear procedures	26
lab tests	66
preventive care	11

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	61
Female	61

**Age**
From 65 to 74	53
From 75 to 84	38
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2013

Hypertension	56
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	21
Depression	0
Chronic Kidney Disease	11
Asthma	0
Osteoperosis	0
Atrial Fibrilation	16
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	10
Cancer	20

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2014 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	183
doctor visit	409
ear procedures	26
lab tests	30

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	62
Female	60

**Age**
From 65 to 74	56
From 75 to 84	0
85 and over	33
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2014

Hypertension	58
High Cholesterol	51
Stroke	0
Ischemic Heart Disease	20
Depression	11
Chronic Kidney Disease	10
Asthma	0
Osteoperosis	0
Atrial Fibrilation	16
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2015 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	116
doctor visit	383
ear procedures	18
lab tests	41

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	116
Female	130

**Age**
From 65 to 74	100
From 75 to 84	0
85 and over	72
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2015

Hypertension	54
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	20
Depression	14
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	17
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	20
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2016 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	145
doctor visit	347
ear procedures	20
lab tests	71

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	63
Female	64

**Age**
From 65 to 74	57
From 75 to 84	35
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2016

Hypertension	55
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	20
Depression	12
Chronic Kidney Disease	13
Asthma	0
Osteoperosis	0
Atrial Fibrilation	16
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	21
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2017 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	140
doctor visit	304
ear procedures	24
lab tests	103

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	63
Female	70

**Age**
From 65 to 74	60
From 75 to 84	41
85 and over	32
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2017

Hypertension	50
High Cholesterol	17
Stroke	0
Ischemic Heart Disease	17
Depression	11
Chronic Kidney Disease	9
Asthma	0
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	14
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2018 were blood draw, lab tests, preventive care and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	132
doctor visit	306
ear procedures	15
lab tests	118
preventive care	15

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	69
Female	60

**Ethnicity**
Non-Hispanic White	116
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	67
From 75 to 84	36
85 and over	26
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2018

Hypertension	54
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	16
Depression	0
Chronic Kidney Disease	13
Asthma	0
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2019 were blood draw, lab tests, ear procedures and preventive care.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	130
doctor visit	262
ear procedures	23
lab tests	99
preventive care	12

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	69
Female	55

**Ethnicity**
Non-Hispanic White	111
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	69
From 75 to 84	31
85 and over	24
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2019

Hypertension	58
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	18
Depression	0
Chronic Kidney Disease	11
Asthma	0
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2020 were blood draw and lab tests.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	112
doctor visit	268
lab tests	60

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	61
Female	51

**Ethnicity**
Non-Hispanic White	99
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	29
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2020

Hypertension	54
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	21
Depression	14
Chronic Kidney Disease	12
Asthma	0
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	21
Dementia	10
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2021 were blood draw and lab tests.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	175
doctor visit	292
lab tests	97

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	72
Female	49

**Ethnicity**
Non-Hispanic White	110
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	39
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2021

Hypertension	55
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	21
Depression	0
Chronic Kidney Disease	9
Asthma	0
Osteoperosis	0
Atrial Fibrilation	11
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	20
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2022 were blood draw and lab tests.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	115
doctor visit	271
lab tests	68

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	69
Female	52

**Ethnicity**
Non-Hispanic White	108
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	42
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2022

Hypertension	75
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	15
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	0
Cancer	19

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2023 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	136
doctor visit	268
ear procedures	13
lab tests	99

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	75
Female	47

**Ethnicity**
Non-Hispanic White	104
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	48
85 and over	11
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2023

Hypertension	75
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	17
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	16
Dementia	0
Cancer	16

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT during 2024 were blood draw, lab tests and ear procedures.

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

blood draw	153
doctor visit	314
ear procedures	20
lab tests	114

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	92
Female	48

**Ethnicity**
Non-Hispanic White	122
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	70
From 75 to 84	56
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. William J Giesen, MD in 2024

Hypertension	75
High Cholesterol	65
Stroke	0
Ischemic Heart Disease	21
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	12
Atrial Fibrilation	21
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	14
Dementia	0
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. William J Giesen, MD for Medicare patients.

The highest averages for the top procedures that Dr. William J Giesen, MD treated as an internist in Darien, CT were blood draw, lab tests, ear procedures and preventive care.

blood draw	145
doctor visit	329
ear procedures	20
lab tests	77
preventive care	12

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. William J Giesen, MD.

**Gender**
Male	67
Female	57

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	59
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	30
85 and over	15
Less than 65	0
65 to 74	60

Average of Total of Conditions of Medicare patients treated by Dr. William J Giesen, MD From 2012 - 2024

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

Hypertension	55
High Cholesterol	43
Stroke	0
Ischemic Heart Disease	17
Depression	4
Chronic Kidney Disease	6
Asthma	0
Osteoporosis	1
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	16
Atrial Fibrillation	13
Cancer	12
Dementia	4

Education & Training

He has a state license in Connecticut.

Licensed In: Connecticut

Ratings & Reviews

Dr. William J Giesen, MD has a high overall rating with an average of 4.22 out of 5 stars based on 9 ratings. We collect ratings and reviews of Dr. William J Giesen, MD from all over the web to help you find the right in Darien, CT.

4.22

Overall Rating