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Home > IL Providers > Neurologists

Dr. Steven M. Zak, MD

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Specializes in: Neurology (Brain & Spinal Cord Disease) and Neurophysiology

Northwestern University, Feinberg School of Medicine

Professional interests include: neurological disorders

1 Ingalls Drive
Harvey, IL 60426

1-855-826-3878

Dr. Steven M. Zak, MD is a neurologist in Harvey, IL specializing in neurology (brain & spinal cord disease) and neurophysiology. He graduated from Northwestern University, Feinberg School of Medicine. Dr. Steven M. Zak, MD is affiliated with OSF Healthcare, HCA Florida Healthcare, St. Joseph's Health, Essentia Health, The University of Chicago Medicine, Montefiore Einstein, Saint Joseph Health System, Sentara Health, Endeavor Health, Children's Hospital of The King's Daughters, Mohawk Valley Health System, Parkview Health, Mount Carmel Health System and HCA Florida Osceola Hospital Los Robles Regional Medical Center.

Office Locations

The University of Chicago Medicine

1 Ingalls Drive
Harvey, IL 60426

1-855-826-3878

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Saint Joseph Health System

10275 Little Patuxent Parkway Suite 300
Columbia, MD 21044

(410) 740-2370

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1403 Kingsport Court
Northbrook, IL 60062

(847) 564-1870

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214 Centerview Drive Suite 100
Brentwood, TN 37027

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915 Broadway Suite 1200
New York, NY 10010

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Noteworthy Medicare Patient Procedures Performed by Dr. Steven M. Zak, MD in 2023

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

Top 5%

By Volume:

laryngeal needle electromyography

By Affordability:

laryngeal electromyography

laryngeal needle electromyography

In 2023, among providers in related specialties within Illinois, Dr. Steven M. Zak, MD performed more laryngeal needle electromyography procedures for Medicare patients than 95% of them and he also had a list price for laryngeal electromyography, and laryngeal needle electromyography 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.

Top 10%

By Volume:

evoked potential test

In 2023, Dr. Steven M. Zak, MD performed more evoked potential test procedures for Medicare patients than 90% of providers in related specialties within Illinois.

Top 25%

By Volume:

electromyography

In 2012, Dr. Steven M. Zak, MD performed more electromyography (EMG) procedures for Medicare patients than 75% of providers in related specialties within Illinois.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2012 were evoked potential test, intraoperative monitoring and diagnostic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	197
evoked potential test	852
intraoperative monitoring	675

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2013 were evoked potential test and diagnostic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	188
evoked potential test	774

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	287
Female	399

**Ethnicity**
Non-Hispanic White	599
Black	50
Hispanic	21
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	332
From 75 to 84	191
85 and over	32
Less than 65	131

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2013

Hypertension	75
High Cholesterol	71
Stroke	11
Ischemic Heart Disease	43
Depression	36
Chronic Kidney Disease	26
Asthma	14
Osteoperosis	15
Atrial Fibrilation	10
Heart Failure	20
Chronic Obstructive Pulmonary Disease	23
Diabetes	32
Dementia	9
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2014 were evoked potential test, diagnostic procedures, anorectal procedures and urologic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

anorectal procedures	19
diagnostic procedures	178
evoked potential test	660
urologic procedures	19

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	222
Female	279

**Ethnicity**
Non-Hispanic White	439
Black	30
Hispanic	19
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	238
From 75 to 84	135
85 and over	17
Less than 65	111

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2014

Hypertension	75
High Cholesterol	72
Stroke	10
Ischemic Heart Disease	43
Depression	41
Chronic Kidney Disease	26
Asthma	15
Osteoperosis	14
Atrial Fibrilation	10
Heart Failure	19
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2015 were evoked potential test, diagnostic procedures, anorectal procedures and urologic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

anorectal procedures	15
diagnostic procedures	346
evoked potential test	428
urologic procedures	15

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	326
Female	400

**Ethnicity**
Non-Hispanic White	622
Black	58
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	330
From 75 to 84	196
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2015

Hypertension	75
High Cholesterol	73
Stroke	11
Ischemic Heart Disease	46
Depression	42
Chronic Kidney Disease	27
Asthma	21
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	19
Chronic Obstructive Pulmonary Disease	23
Diabetes	37
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2016 were diagnostic procedures and evoked potential test.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	706
evoked potential test	594

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	229
Female	286

**Ethnicity**
Non-Hispanic White	434
Black	61
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	257
From 75 to 84	127
85 and over	19
Less than 65	112

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2016

Hypertension	75
High Cholesterol	70
Stroke	7
Ischemic Heart Disease	40
Depression	39
Chronic Kidney Disease	34
Asthma	29
Osteoperosis	13
Atrial Fibrilation	10
Heart Failure	19
Chronic Obstructive Pulmonary Disease	23
Diabetes	37
Dementia	10
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2017 were evoked potential test, diagnostic procedures, electroencephalography (EEG) and anorectal procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

anorectal procedures	15
diagnostic procedures	332
electroencephalography (EEG)	61
evoked potential test	984
urologic procedures	15

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	389
Female	434

**Ethnicity**
Non-Hispanic White	711
Black	61
Hispanic	26
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	379
From 75 to 84	236
85 and over	32
Less than 65	176

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2017

Hypertension	75
High Cholesterol	68
Stroke	9
Ischemic Heart Disease	41
Depression	41
Chronic Kidney Disease	38
Asthma	13
Osteoperosis	15
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	25
Diabetes	38
Dementia	10
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2018 were evoked potential test, diagnostic procedures, electroencephalography (EEG) and anorectal procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

anorectal procedures	11
diagnostic procedures	430
electroencephalography (EEG)	39
evoked potential test	1478
urologic procedures	11

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	547
Female	639

**Ethnicity**
Non-Hispanic White	1062
Black	57
Hispanic	23
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	612
From 75 to 84	325
85 and over	52
Less than 65	197

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2018

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	40
Depression	39
Chronic Kidney Disease	35
Asthma	12
Osteoperosis	14
Atrial Fibrilation	10
Heart Failure	18
Chronic Obstructive Pulmonary Disease	23
Diabetes	35
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2019 were evoked potential test and diagnostic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	352
evoked potential test	1318

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	476
Female	597

**Ethnicity**
Non-Hispanic White	936
Black	67
Hispanic	32
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	565
From 75 to 84	295
85 and over	52
Less than 65	161

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	39
Depression	40
Chronic Kidney Disease	38
Asthma	15
Osteoperosis	15
Atrial Fibrilation	11
Heart Failure	19
Chronic Obstructive Pulmonary Disease	22
Diabetes	38
Dementia	10
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2020 were evoked potential test and diagnostic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	279
evoked potential test	973

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	369
Female	405

**Ethnicity**
Non-Hispanic White	682
Black	47
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	412
From 75 to 84	220
85 and over	32
Less than 65	110

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	42
Depression	39
Chronic Kidney Disease	37
Asthma	13
Osteoperosis	14
Atrial Fibrilation	12
Heart Failure	19
Chronic Obstructive Pulmonary Disease	20
Diabetes	36
Dementia	11
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2021 were evoked potential test, diagnostic procedures, anorectal procedures and urologic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

anorectal procedures	12
diagnostic procedures	270
evoked potential test	897
urologic procedures	12

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	329
Female	370

**Ethnicity**
Non-Hispanic White	598
Black	43
Hispanic	30
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	345
From 75 to 84	210
85 and over	34
Less than 65	110

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	44
Depression	40
Chronic Kidney Disease	36
Asthma	13
Osteoperosis	17
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	21
Diabetes	35
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL during 2022 were evoked potential test and diagnostic procedures.

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

diagnostic procedures	283
evoked potential test	913

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	345
Female	368

**Ethnicity**
Non-Hispanic White	610
Black	43
Hispanic	0
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	370
From 75 to 84	246
85 and over	22
Less than 65	75

Conditions of Medicare patients treated by Dr. Steven M. Zak, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	35
Depression	33
Chronic Kidney Disease	25
Asthma	14
Osteoperosis	19
Atrial Fibrilation	18
Heart Failure	15
Chronic Obstructive Pulmonary Disease	20
Diabetes	38
Dementia	6
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Steven M. Zak, MD for Medicare patients.

The highest averages for the top procedures that Dr. Steven M. Zak, MD treated as a neurologist in Harvey, IL were evoked potential test, intraoperative monitoring, diagnostic procedures and electroencephalography (EEG).

anorectal procedures	14
diagnostic procedures	323
electroencephalography (EEG)	50
evoked potential test	897
intraoperative monitoring	675
urologic procedures	14

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Steven M. Zak, MD.

**Gender**
Male	319
Female	379

**Ethnicity**
Black / African American	47
Asian / Pacific Islander	0
Non-Hispanic White	608
Native American / Alaskan Native	0
Hispanic	15
Other	8

**Age**
75 to 84	198
85 and over	26
Less than 65	107
65 to 74	349

Average of Total of Conditions of Medicare patients treated by Dr. Steven M. Zak, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	66
Stroke	9
Ischemic Heart Disease	37
Depression	35
Chronic Kidney Disease	29
Asthma	14
Osteoporosis	13
Heart Failure	17
Chronic Obstructive Pulmonary Disease	20
Diabetes	33
Atrial Fibrillation	10
Dementia	8
Cancer	11

Education & Training

Dr. Steven M. Zak, MD graduated from Northwestern University, Feinberg School of Medicine. He completed residency at Arizona Health Sciences Center. He is certified by the American Board of Psychiatry and Neurology, American Board of Psychiatry and Neurology and has a state license in Illinois.

Medical School: Northwestern University, Feinberg School of Medicine

Residency: Arizona Health Sciences Center

Board Certification: American Board of Psychiatry and Neurology, American Board of Psychiatry and Neurology (1987)

Licensed In: Illinois

Affiliations & Hospitals

Dr. Steven M. Zak, MD is associated with these hospitals and organizations:

OSF Healthcare

HCA Florida Healthcare

St. Joseph's Health

Essentia Health

The University of Chicago Medicine

Montefiore Einstein

Saint Joseph Health System

Sentara Health

Endeavor Health

Children's Hospital of The King's Daughters

Mohawk Valley Health System

Parkview Health

Mount Carmel Health System

HCA Florida Osceola Hospital Los Robles Regional Medical Center

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. Steven M. Zak, MD appears to accept the following insurance providers: Aetna PPO, Blue Cross Blue Shield PPO, CIGNA PPO, CIGNA POS, CIGNA HMO, MultiPlan PPO, Medicare Advantage, Aetna POS, Affinity Health Plan, Aetna, Medicare, Humana, Anthem, PHCS PPO, Aetna Medicare PPO, United W500 Emergent Wrap, Aetna Better Health *see insurance page, United Options (PPO), ArchCare, CountyCare *see insurance page, BCBS HMO (HMOI) (specialists only), United Select (HMO & EPO) (specialists only), 1199SEIU Benefit Funds, University of Chicago Health Plan (UCHP), United Choice HMO (specialists only), CDPHP, Amidacare, BCBS Blue Precision HMO (specialists only), Aetna HMO (specialists only) and United Choice Plus POS/PPO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Steven M. Zak, MD accepts the following insurance providers:

Aetna PPO

Blue Cross Blue Shield PPO

CIGNA PPO

CIGNA POS

CIGNA HMO

MultiPlan PPO

Medicare Advantage

Aetna POS

Affinity Health Plan

Aetna

Medicare

Humana

Anthem

PHCS PPO

Aetna Medicare PPO

United W500 Emergent Wrap

Aetna Better Health *see insurance page

United Options (PPO)

ArchCare

CountyCare *see insurance page

BCBS HMO (HMOI) (specialists only)

United Select (HMO & EPO) (specialists only)

1199SEIU Benefit Funds

University of Chicago Health Plan (UCHP)

United Choice HMO (specialists only)

CDPHP

Amidacare

BCBS Blue Precision HMO (specialists only)

Aetna HMO (specialists only)

United Choice Plus POS/PPO

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General Payments

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

**Payments by Company**
NUVASIVE, INC.	$95 NVM5 $95

**Types of Payments**
Food and Beverage	$95

Biography

Dr. Steven Zak's specialties are neurophysiology and neurology (brain & spinal cord disease). In Dr. Zak's practice, he is particularly interested in neurological disorders. He is professionally affiliated with Parkview Health, Montefiore Einstein, and Mount Carmel Health System. He obtained his medical school training at Northwestern University, Feinberg School of Medicine and performed his residency at Arizona Health Sciences Center. He accepts Anthem, Blue California, Aetna, and more. He has a closed panel according to Mount Carmel Health System.