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Dr. Marilyn Kay Kosier, MD

Accepting New Patients

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Specializes in: Ophthalmology (Eye Disease)

Ohio State University College of Medicine

1520 Sheridan Drive
Lancaster, OH 43130

(740) 654-8424

Dr. Marilyn Kay Kosier, MD is an ophthalmologist in Lancaster, OH specializing in ophthalmology (eye disease). She graduated from Ohio State University College of Medicine. Dr. Marilyn Kay Kosier, MD is affiliated with Mount Carmel Health System and Fairfield Medical Center.

Office Locations

Fairfield Medical Center

1520 Sheridan Drive
Lancaster, OH 43130

(740) 654-8424

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Noteworthy Medicare Patient Procedures Performed by Dr. Marilyn Kay Kosier, MD in 2023

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

Top 5%

By Affordability:

ophthalmic biometry

In 2023, Dr. Marilyn Kay Kosier, MD had a list price for ophthalmic biometry that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Ohio. 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 25%

By Affordability:

anterior segment surgery

cataract surgery

cataract surgery with IOL implantation

comprehensive eye exam

extracapsular cataract extraction with IOL implantation

extracapsular lens removal

eye exam

fundus photography

gonioscopy

intermediate eye exam

intraocular lens implant

laser eye surgery

lens removal surgery

lens replacement surgery

scanning computerized ophthalmic diagnostic imaging

SCODI of the posterior segment

secondary cataract surgery

simple cataract surgery

YAG laser capsulotomy

YAG laser surgery

In 2012, Dr. Marilyn Kay Kosier, MD had a list price for anterior segment surgery, cataract surgery, cataract surgery with IOL implantation, comprehensive eye exam, extracapsular cataract extraction (ECCE) with IOL implantation, extracapsular lens removal, eye exam, fundus photography, gonioscopy, intermediate eye exam, intraocular lens (IOL) implant, laser eye surgery, lens removal surgery, lens replacement surgery, scanning computerized ophthalmic diagnostic imaging (SCODI), SCODI of the posterior segment (SCODI-P), secondary cataract surgery, simple cataract surgery, YAG laser capsulotomy, and YAG laser surgery that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Ohio. 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. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2012 were eye procedures, laser treatment, capsulotomy and ultrasound (sonogram).

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	37
eye procedures	2512
laser treatment	75
ultrasound (sonogram)	15

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2013 were eye procedures, capsulotomy, laser treatment and ultrasound (sonogram).

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	34
doctor visit	20
eye procedures	2263
lacrimal (tearing system) procedures	16
laser treatment	34
ultrasound (sonogram)	24

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	362
Female	646

**Ethnicity**
Non-Hispanic White	988
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	367
From 75 to 84	363
85 and over	185
Less than 65	93

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	4
Ischemic Heart Disease	38
Depression	21
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	15
Chronic Obstructive Pulmonary Disease	15
Diabetes	40
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2014 were eye procedures, laser treatment, capsulotomy and evoked potential test.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	34
doctor visit	22
evoked potential test	28
eye procedures	2341
lacrimal (tearing system) procedures	26
laser treatment	57
ultrasound (sonogram)	25

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	345
Female	591

**Ethnicity**
Non-Hispanic White	913
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	369
From 75 to 84	315
85 and over	178
Less than 65	74

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2014

Hypertension	75
High Cholesterol	62
Stroke	5
Ischemic Heart Disease	41
Depression	19
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	16
Chronic Obstructive Pulmonary Disease	13
Diabetes	38
Dementia	10
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2015 were eye procedures, lab tests, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	37
doctor visit	65
eye procedures	2133
lab tests	138
lacrimal (tearing system) procedures	28
laser treatment	37
ultrasound (sonogram)	14

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	650
Female	1106

**Ethnicity**
Non-Hispanic White	1722
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	612
From 75 to 84	628
85 and over	374
Less than 65	142

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2015

Hypertension	75
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	39
Depression	19
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	15
Diabetes	39
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2016 were eye procedures, lab tests, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	40
doctor visit	54
evoked potential test	22
eye procedures	2546
lab tests	262
lacrimal (tearing system) procedures	29
laser treatment	40
plastic surgery procedures	12
ultrasound (sonogram)	20

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	365
Female	610

**Ethnicity**
Non-Hispanic White	955
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	391
From 75 to 84	319
85 and over	194
Less than 65	71

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2016

Hypertension	75
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	38
Depression	19
Chronic Kidney Disease	30
Asthma	15
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	16
Chronic Obstructive Pulmonary Disease	13
Diabetes	39
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2017 were eye procedures, lab tests, laser treatment and capsulotomy.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	29
doctor visit	81
eye procedures	2493
lab tests	186
lacrimal (tearing system) procedures	17
laser treatment	52
ultrasound (sonogram)	25

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	383
Female	594

**Ethnicity**
Non-Hispanic White	958
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	389
From 75 to 84	346
85 and over	177
Less than 65	65

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2017

Hypertension	74
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	39
Depression	20
Chronic Kidney Disease	36
Asthma	6
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	40
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2018 were eye procedures, lab tests, laser treatment and capsulotomy.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	19
doctor visit	83
eye procedures	2313
lab tests	202
laser treatment	43
ultrasound (sonogram)	16

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	358
Female	525

**Ethnicity**
Non-Hispanic White	860
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	351
From 75 to 84	317
85 and over	155
Less than 65	60

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2018

Hypertension	75
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	40
Depression	21
Chronic Kidney Disease	37
Asthma	5
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	44
Dementia	10
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2019 were eye procedures, lab tests, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	24
doctor visit	233
eye procedures	1982
lab tests	212
laser treatment	24
ultrasound (sonogram)	14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	334
Female	492

**Ethnicity**
Non-Hispanic White	800
Black	0
Hispanic	0
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	346
From 75 to 84	292
85 and over	144
Less than 65	44

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2019

Hypertension	75
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	38
Depression	22
Chronic Kidney Disease	39
Asthma	6
Osteoperosis	9
Atrial Fibrilation	15
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	42
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2020 were eye procedures, lab tests, lacrimal (tearing system) procedures and capsulotomy.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	26
doctor visit	217
eye procedures	1429
lab tests	131
lacrimal (tearing system) procedures	26
laser treatment	26

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	265
Female	366

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

**Age**
From 65 to 74	270
From 75 to 84	226
85 and over	104
Less than 65	31

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2020

Hypertension	73
High Cholesterol	61
Stroke	5
Ischemic Heart Disease	35
Depression	17
Chronic Kidney Disease	35
Asthma	6
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	40
Dementia	7
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2021 were eye procedures and lab tests.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

doctor visit	696
eye procedures	987
lab tests	95

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	262
Female	374

**Ethnicity**
Non-Hispanic White	621
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	265
From 75 to 84	229
85 and over	113
Less than 65	29

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2021

Hypertension	75
High Cholesterol	62
Stroke	4
Ischemic Heart Disease	32
Depression	20
Chronic Kidney Disease	36
Asthma	6
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	39
Dementia	10
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH during 2022 were eye procedures, lab tests, capsulotomy and laser treatment.

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

capsulotomy	22
doctor visit	626
eye procedures	927
lab tests	43
laser treatment	22

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	248
Female	337

**Ethnicity**
Non-Hispanic White	567
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	257
From 75 to 84	210
85 and over	87
Less than 65	31

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2022

Hypertension	75
High Cholesterol	73
Stroke	7
Ischemic Heart Disease	29
Depression	17
Chronic Kidney Disease	24
Asthma	10
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	11
Chronic Obstructive Pulmonary Disease	14
Diabetes	39
Dementia	4
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Marilyn Kay Kosier, MD for Medicare patients.

The highest averages for the top procedures that Dr. Marilyn Kay Kosier, MD treated as an ophthalmologist in Lancaster, OH were eye procedures, lab tests, laser treatment and capsulotomy.

capsulotomy	30
doctor visit	209
evoked potential test	25
eye procedures	1993
lab tests	158
lacrimal (tearing system) procedures	23
laser treatment	41
plastic surgery procedures	12
ultrasound (sonogram)	19

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Marilyn Kay Kosier, MD.

**Gender**
Male	324
Female	512

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	817
Native American / Alaskan Native	0
Hispanic	0
Other	1

**Age**
75 to 84	295
85 and over	155
Less than 65	58
65 to 74	328

Average of Total of Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD From 2012 - 2022

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

Hypertension	67
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	33
Depression	17
Chronic Kidney Disease	27
Asthma	6
Osteoporosis	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	36
Atrial Fibrillation	13
Dementia	7
Cancer	8

Education & Training

Dr. Marilyn Kay Kosier, MD graduated from Ohio State University College of Medicine. She is certified by the Board Certification: Unknown and has a state license in Ohio.

Medical School: Ohio State University College of Medicine

Board Certification: Board Certification: Unknown

Licensed In: Ohio

Affiliations & Hospitals

Dr. Marilyn Kay Kosier, MD is associated with these hospitals and organizations:

Mount Carmel Health System

Fairfield Medical Center

Ratings & Reviews

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General Payments

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

**Payments by Company**
Johnson & Johnson Surgical Vision, Inc.	$466 Tecnis Symfony IOL $466
Shire North American Group Inc	$390 XIIDRA $232	$158
Abbott Laboratories	$343 Non-Covered $129	Medical Optics $118	Optics $96
Allergan Inc.	$194 RESTASIS $161	XEN $19	COMBIGAN $2	$11
Bausch & Lomb Americas Inc.	$144 VYZULTA $144
Other	$639 Rocklatan $122	DEXTENZA $119	ENVISTA $50	NoProduct $45	Bacitracin Ophthalmic Ointment USP $30	Other $274

**Types of Payments**
Food and Beverage	$1,452
Consulting Fee	$466
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$150
Education	$108

Biography

Dr. Marilyn Kosier practices ophthalmology (eye disease). Dr. Kosier studied medicine at Ohio State University College of Medicine. Areas of expertise for Dr. Kosier include eye problems. Her professional affiliations include Mount Carmel Health System and Fairfield Medical Center. She welcomes new patients at her office in as reported by Mount Carmel Health System.

Select Year:

Dr. Marilyn Kay Kosier, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Marilyn Kay Kosier, MD in 2023

By Affordability:

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. Marilyn Kay Kosier, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Marilyn Kay Kosier, MD 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. Marilyn Kay Kosier, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography

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