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Home > WI Providers > Orthopedic Surgeons

Dr. Eric S. Gaenslen, MD

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Specializes in: Orthopedics/Orthopedic Surgery and Hand Surgery

University of Wisconsin School of Medicine and Public Health

12203 N Corporate Parkway
Mequon, WI 53092

(262) 387-8300

Dr. Eric S. Gaenslen, MD is an orthopedist in Mequon, WI specializing in orthopedics/orthopedic surgery and hand surgery. He graduated from University of Wisconsin School of Medicine and Public Health. Dr. Eric S. Gaenslen, MD is affiliated with Advocate Health Care.

Office Locations

Advocate Health Care

12203 N Corporate Parkway
Mequon, WI 53092

(262) 387-8300

(262) 387-8249

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Advocate Health Care

3003 W Good Hope Road
Milwaukee, WI 53209

(414) 329-8001

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Advocate Health Care

975 Port Washington Road Suite 110
Grafton, WI 53024

(262) 329-8001

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Noteworthy Medicare Patient Procedures Performed by Dr. Eric S. Gaenslen, MD in 2023

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

Top 25%

By Volume:

injections

nerve decompression surgery

open surgery

trigger finger surgery

upper extremity surgery

In 2012, Dr. Eric S. Gaenslen, MD performed more injections, nerve decompression surgery, open surgery, trigger finger surgery, and upper extremity surgery procedures for Medicare patients than 75% of providers in related specialties within Wisconsin.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2012 were injections, upper extremity surgery, rehabilitation and aspiration.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	51
blood draw	20
decompression surgery	36
doctor visit	430
injections	194
nerve procedures	36
open surgery	36
rehabilitation	66
tendon surgery	44
upper extremity surgery	80

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2013 were injections, rehabilitation, upper extremity surgery and aspiration.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	73
blood draw	16
decompression surgery	34
doctor visit	470
immobilization	15
injections	217
manual therapy	37
nerve procedures	34
open surgery	34
rehabilitation	106
tendon surgery	57
upper extremity surgery	91

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	141
Female	209

**Ethnicity**
Non-Hispanic White	284
Black	55
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	155
From 75 to 84	98
85 and over	50
Less than 65	47

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2013

Hypertension	63
High Cholesterol	53
Stroke	5
Ischemic Heart Disease	21
Depression	21
Chronic Kidney Disease	19
Asthma	9
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	28
Dementia	7
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2014 were injections, upper extremity surgery, aspiration and nerve procedures.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	75
blood draw	17
decompression surgery	52
doctor visit	437
injections	218
nerve procedures	52
open surgery	52
rehabilitation	44
tendon surgery	43
upper extremity surgery	95

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	132
Female	192

**Ethnicity**
Non-Hispanic White	254
Black	54
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	148
From 75 to 84	83
85 and over	33
Less than 65	60

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2014

Hypertension	59
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	21
Depression	27
Chronic Kidney Disease	17
Asthma	10
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	27
Dementia	4
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2015 were injections, upper extremity surgery, aspiration and nerve procedures.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	62
decompression surgery	55
doctor visit	406
injections	186
nerve procedures	55
open surgery	55
tendon surgery	49
upper extremity surgery	104

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	270
Female	386

**Ethnicity**
Non-Hispanic White	540
Black	82
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	286
From 75 to 84	174
85 and over	76
Less than 65	120

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2015

Hypertension	55
High Cholesterol	56
Stroke	3
Ischemic Heart Disease	26
Depression	23
Chronic Kidney Disease	17
Asthma	11
Osteoperosis	9
Atrial Fibrilation	9
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	28
Dementia	6
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2016 were injections, upper extremity surgery, aspiration and nerve procedures.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	81
decompression surgery	49
doctor visit	432
hospital care	15
immobilization	15
injections	188
inpatient care	15
nerve procedures	49
open surgery	49
tendon surgery	42
upper extremity surgery	91

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	125
Female	225

**Ethnicity**
Non-Hispanic White	281
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	158
From 75 to 84	85
85 and over	43
Less than 65	64

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2016

Hypertension	61
High Cholesterol	49
Stroke	4
Ischemic Heart Disease	23
Depression	21
Chronic Kidney Disease	21
Asthma	14
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	29
Dementia	5
Cancer	9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2017 were injections, upper extremity surgery, aspiration and tendon surgery.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	74
decompression surgery	35
doctor visit	452
injections	178
nerve procedures	35
open surgery	35
tendon surgery	58
upper extremity surgery	93

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	144
Female	198

**Ethnicity**
Non-Hispanic White	277
Black	48
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	167
From 75 to 84	81
85 and over	39
Less than 65	55

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2017

Hypertension	65
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	27
Depression	24
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	13
Diabetes	29
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2018 were injections, upper extremity surgery, aspiration and nerve procedures.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	75
decompression surgery	40
doctor visit	425
injections	200
nerve procedures	40
open surgery	40
tendon surgery	39
upper extremity surgery	79

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	136
Female	195

**Ethnicity**
Non-Hispanic White	269
Black	41
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	167
From 75 to 84	78
85 and over	38
Less than 65	48

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2018

Hypertension	60
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	24
Depression	26
Chronic Kidney Disease	20
Asthma	11
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	22
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2019 were injections, aspiration, upper extremity surgery and tendon surgery.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	75
decompression surgery	31
doctor visit	430
hospital care	17
injections	209
inpatient care	17
nerve procedures	31
open surgery	31
tendon surgery	37
upper extremity surgery	68

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	139
Female	234

**Ethnicity**
Non-Hispanic White	302
Black	48
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	202
From 75 to 84	88
85 and over	45
Less than 65	38

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2019

Hypertension	57
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	25
Depression	30
Chronic Kidney Disease	27
Asthma	9
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	25
Dementia	10
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2020 were injections, upper extremity surgery, tendon surgery and nerve procedures.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	21
decompression surgery	34
doctor visit	284
hospital care	13
injections	100
inpatient care	13
nerve procedures	34
open surgery	34
tendon surgery	36
upper extremity surgery	70

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	109
Female	170

**Ethnicity**
Non-Hispanic White	228
Black	29
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	150
From 75 to 84	68
85 and over	36
Less than 65	25

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2020

Hypertension	59
High Cholesterol	61
Stroke	4
Ischemic Heart Disease	30
Depression	27
Chronic Kidney Disease	25
Asthma	11
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	13
Diabetes	23
Dementia	10
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2021 were injections, upper extremity surgery, tendon surgery and aspiration.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	51
decompression surgery	29
doctor visit	415
hospital care	17
injections	169
inpatient care	17
nerve procedures	29
open surgery	29
tendon surgery	55
upper extremity surgery	84

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	152
Female	197

**Ethnicity**
Non-Hispanic White	307
Black	25
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	182
From 75 to 84	94
85 and over	36
Less than 65	37

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2021

Hypertension	68
High Cholesterol	63
Stroke	3
Ischemic Heart Disease	36
Depression	27
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	17
Chronic Obstructive Pulmonary Disease	12
Diabetes	26
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI during 2022 were injections, upper extremity surgery, tendon surgery and aspiration.

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

aspiration	27
decompression surgery	24
doctor visit	372
injections	102
nerve procedures	24
open surgery	24
tendon surgery	40
upper extremity surgery	64

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Male	133
Female	195

**Ethnicity**
Non-Hispanic White	281
Black	28
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	145
From 75 to 84	124
85 and over	29
Less than 65	30

Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD in 2022

Hypertension	66
High Cholesterol	73
Stroke	5
Ischemic Heart Disease	23
Depression	23
Chronic Kidney Disease	26
Asthma	10
Osteoperosis	16
Atrial Fibrilation	19
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	27
Dementia	5
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Eric S. Gaenslen, MD for Medicare patients.

The highest averages for the top procedures that Dr. Eric S. Gaenslen, MD treated as an orthopedist in Mequon, WI were injections, upper extremity surgery, rehabilitation and aspiration.

aspiration	60
blood draw	17
decompression surgery	38
doctor visit	413
hospital care	15
immobilization	15
injections	178
inpatient care	15
manual therapy	37
nerve procedures	38
open surgery	38
rehabilitation	72
tendon surgery	45
upper extremity surgery	83

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Eric S. Gaenslen, MD.

**Gender**
Female	200
Male	134

**Ethnicity**
Black / African American	37
Asian / Pacific Islander	0
Non-Hispanic White	274
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	38
75 to 84	88
Less than 65	47
65 to 74	160

Average of Total of Conditions of Medicare patients treated by Dr. Eric S. Gaenslen, MD From 2012 - 2022

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

Hypertension	55
High Cholesterol	52
Stroke	2
Ischemic Heart Disease	23
Depression	22
Chronic Kidney Disease	20
Asthma	9
Osteoporosis	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	24
Atrial Fibrillation	9
Cancer	11
Dementia	6

Education & Training

Dr. Eric S. Gaenslen, MD graduated from University of Wisconsin School of Medicine and Public Health. He completed residency at University of Missouri Health System. He is certified by the American Board of Orthopaedic Surgery American Board of Orthopaedic Surgery, Surgery of the Hand and has a state license in Wisconsin.

Medical School: University of Wisconsin School of Medicine and Public Health

Residency: University of Missouri Health System

Board Certification: American Board of Orthopaedic Surgery American Board of Orthopaedic Surgery, Surgery of the Hand

Licensed In: Wisconsin

Affiliations & Hospitals

Dr. Eric S. Gaenslen, MD is associated with these hospitals and organizations:

Advocate Health Care

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Eric S. Gaenslen, MD appears to accept the following insurance providers: HFN, Aetna Medicare, HealthPartners, Blue Cross Blue Shield of Illinois, United Healthcare Medicare, Private Healthcare Systems (PHCS), Prime Health, Three Rivers, Aetna, United Healthcare, Medicare, Network Health, Medicaid, Humana, Cigna, Molina Healthcare, TRICARE, Coventry, Anthem, HealthSmart, Cofinity, Everpointe Network, Independent Care (iCARE) Medicare, FirstHealth, Fond du Lac Area Businesses On Health (FABOH), Managed Health Services (MHS) Medicare, Quartz Medicare, Health Management Network (HMN), Quartz, Common Ground Healthcare, AAH UMR Select - Team Member Plan, Wisconsin Physicians Service (WPS), HealthPartners Medicare, Community Care Inc (CCI), HealthEOS, Arise Health Plan, Health Tradition, Trilogy, Health Payment Systems (HPS), BayCare Clinic Employee Plan, Provider Network of America (PNOA) and AAH UMR Preferred - Team Member Plan.

Insurance Accepted by Provider includes:

According to our sources, Dr. Eric S. Gaenslen, MD accepts the following insurance providers:

HFN

Aetna Medicare

HealthPartners

Blue Cross Blue Shield of Illinois

United Healthcare Medicare

Private Healthcare Systems (PHCS)

Prime Health

Three Rivers

Aetna

United Healthcare

Medicare

Network Health

Medicaid

Humana

Cigna

Molina Healthcare

TRICARE

Coventry

Anthem

HealthSmart

Cofinity

Everpointe Network

Independent Care (iCARE) Medicare

FirstHealth

Fond du Lac Area Businesses On Health (FABOH)

Managed Health Services (MHS) Medicare

Quartz Medicare

Health Management Network (HMN)

Quartz

Common Ground Healthcare

AAH UMR Select - Team Member Plan

Wisconsin Physicians Service (WPS)

HealthPartners Medicare

Community Care Inc (CCI)

HealthEOS

Arise Health Plan

Health Tradition

Trilogy

Health Payment Systems (HPS)

BayCare Clinic Employee Plan

Provider Network of America (PNOA)

AAH UMR Preferred - Team Member Plan

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Research Payments

Dr. Eric S. Gaenslen, MD has received 6 research payments totaling $130,800.

Biography

Dr. Eric Gaenslen sees patients in Grafton, WI, Milwaukee, WI, and Mequon, WI. His medical specialties are hand surgery and orthopedics/orthopedic surgery. Dr. Gaenslen graduated from the University of Wisconsin School of Medicine and Public Health. For his residency, Dr. Gaenslen trained at the University of Missouri Health System. He is in-network for several insurance carriers, including Anthem, Cofinity, and Blue California. Dr. Gaenslen is professionally affiliated with Aurora Sinai Medical Center, Aurora West Allis Medical Center, and Advocate Health Care.