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Dr. Mark A. Greiner, MD

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Specializes in: Ophthalmology (Eye Disease) and Surgery

University of California, Davis, School of Medicine (2007)

Professional interests include: corneal topography, ulcers, keratitis, and more.

105 E. 9th Street Coralville, Iowa River Landing
Coralville, IA 52241

(319) 356-2861

Dr. Mark A. Greiner, MD is an ophthalmologist in Coralville, IA specializing in ophthalmology (eye disease) and surgery. He graduated from University of California, Davis, School of Medicine in 2007 and has 19 years of experience. Dr. Mark A. Greiner, MD is affiliated with University of Iowa, U.S. Department of Veterans Affairs and University of Iowa Health Care.

Office Locations

105 E. 9th Street Coralville, Iowa River Landing
Coralville, IA 52241

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200 Hawkins Drive
Iowa City, IA 52242

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3600 30th Street Central Iowa Hcs (636a7) Des Moines Division
Des Moines, IA 50310

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Some issues Dr. Mark A. Greiner, MD can help you with:

Biopsy

A biopsy is a procedure performed to remove a small sample of cells for testing. The cells are examined in a laboratory to check for disease, or sometimes to see how badly a known disease is affecting them. Biopsy can be performed on any part of the body.

Although biopsy is most often associated with cancer, it can also be used to check for other diseases, such as infections. A biopsy sample can be scraped, cut, collected with a needle, taken with a machine that punches out a tiny piece, or removed with the tiny tools in an endoscope.

In most cases, a biopsy is a simple outpatient procedure. Depending on the procedure, patients may need to stop taking certain medications beforehand, such as blood thinners. It is important for patients to tell doctors if they are pregnant, as certain biopsies require the use of x-rays to guide the needle to the right location. There is usually very little pain associated with a biopsy. Patients will have to wait a few days to hear the results.

Facial Paralysis

Facial paralysis is an inability to move the muscles in the face. It often affects only one side, and it can happen quite suddenly. Facial paralysis may make one's face feel frozen or numb.

Facial paralysis can happen when there is inflammation or damage to either the part of the brain that controls the facial muscles or the nerve that carries signals from the brain to the face. Some common causes include:

Stroke, which can affect the part of the brain controlling the face and prevent those muscles from working
Bell's palsy, an inflammation of the main facial nerve
Lyme disease
Birth trauma or difficult birth, which can cause facial paralysis in babies (usually temporary)
Head trauma in which nerves are damaged

Facial paralysis is a frustrating and frightening experience, but many cases are temporary and go away on their own. Even with more difficult cases, there are treatment options available, including rehabilitation, pain management, and surgery.

LASIK

LASIK (laser-assisted in situ keratomileusis) is a surgical procedure that improves vision by permanently correcting refractive vision errors. Refractive vision errors are sight problems (such as nearsightedness, farsightedness, and astigmatism) that typically require patients to wear contact lenses or glasses. Nearsightedness (myopia) causes blurred vision at a distance, while farsightedness (hyperopia) makes objects that are up close appear blurry. Astigmatism results in blurred vision at both near and far distances. Each eye is either nearsighted or farsighted, and can additionally have astigmatism. These refractive vision errors develop from imperfections in the curvature of the eye, which LASIK fixes through the use of a laser. The laser changes the shape of the eye by cutting away tissue from the cornea (clear outer layer of the eye).

LASIK is generally considered an elective procedure (not medically necessary) since patients can wear glasses or contact lenses instead of undergoing LASIK. Nevertheless, many people still elect to undergo LASIK to have better vision without having to wear corrective lenses. Certain professionals, such as pilots, military members, firefighters, and athletes, might particularly benefit from LASIK.

Ophthalmologists (eye doctors) evaluate patients before surgery, measuring the cornea and checking for any eye irregularities that would disqualify patients from LASIK. A special eye scanner is used to create a map of the cornea. This map guides the surgeon in developing an individualized LASIK treatment plan. Once approved for LASIK, contact-wearers are advised to switch to glasses for the three weeks leading up to their surgery.

LASIK is a brief procedure, lasting for about half an hour, depending on the state of a patient's eyes and the corneal reshaping required. Patients lie down on a reclining chair and have numbing eye drops applied to one or both eyes to eliminate pain and discomfort during the procedure. While the eyes are held open by a device, the eye surgeon raises a fixation light where patients direct their eyes. The surgeon uses a femtosecond laser to cut a precise circular incision in the cornea's surface. The surgeon then manually folds back the corneal flap to access the stroma (inner cornea).

An excimer laser is then used to remove certain amounts of corneal tissue. For patients with farsightedness, the laser cuts tissue on the outer regions of the cornea, making the central cornea more prominent. For patients with nearsightedness, the opposite is done; central corneal tissue is removed while the outer tissue is left alone, flattening the eye. In patients with astigmatism, the laser is used to even out the surface of the corneal tissue, making the eye more spherical. When the lasering process is complete, the ophthalmologist folds the corneal flap to its regular position. The flap quickly begins to heal and naturally reattach itself to the eye.

LASIK patients need someone to drive them home from the procedure and cannot drive for the following 24 hours. Recovery from LASIK lasts about five days. Patients typically notice improved vision within a day or two of surgery. Prescription eye drops are given to patients to alleviate discomfort and promote eye healing. During this recovery time, patients must be incredibly careful not to touch or rub their eyes. Ophthalmologists often instruct patients to wear protective glasses during the day and night to prevent potential damage from eye rubbing.

LASIK can improve the experience of certain activities such as swimming or reading, and in some cases, LASIK can be a life-changing procedure for those with severe refractive vision errors. LASIK may also save patients money by eliminating the recurring need for updated corrective lenses.

Noteworthy Medicare Patient Procedures Performed by Dr. Mark A. Greiner, MD in 2023

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

Top 5%

By Volume:

corneal lesion excision

endothelial keratoplasty

SCODI of the anterior segment

ultrasound corneal pachymetry

By Affordability:

B-scan

diagnostic B-scan

ophthalmic ultrasound

In 2023, among providers in related specialties within Iowa, Dr. Mark A. Greiner, MD performed more corneal lesion excision, endothelial keratoplasty, SCODI of the anterior segment (SCODI-A), and ultrasound corneal pachymetry procedures for Medicare patients than 95% of them and he also had a list price for B-scan, diagnostic B-scan, and ophthalmic ultrasound 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 25%

By Volume:

eye procedures

By Affordability:

diagnostic imaging

In 2012, among providers in related specialties within Iowa, Dr. Mark A. Greiner, MD performed more eye procedures procedures for Medicare patients than 75% of them and he also had a list price for diagnostic imaging that was lower than the list prices billed to Medicare by 75% 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

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

doctor visit	110

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2013 were eye procedures, transplant procedures, ultrasound (sonogram) and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

doctor visit	405
excision	17
eye procedures	336
removal of lesion (e.g. growth)	17
transplant procedures	43
ultrasound (sonogram)	43

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	113
Female	157

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

**Age**
From 65 to 74	93
From 75 to 84	83
85 and over	50
Less than 65	44

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2013

Hypertension	54
High Cholesterol	40
Stroke	0
Ischemic Heart Disease	31
Depression	14
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	6
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Dementia	5
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2014 were eye procedures, lab tests, ultrasound (sonogram) and transplant procedures.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	35
doctor visit	746
excision	17
eye procedures	498
lab tests	72
lacrimal (tearing system) procedures	27
removal of lesion (e.g. growth)	17
transplant procedures	47
ultrasound (sonogram)	63

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	154
Female	259

**Ethnicity**
Non-Hispanic White	383
Black	11
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	119
85 and over	70
Less than 65	48

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2014

Hypertension	54
High Cholesterol	41
Stroke	3
Ischemic Heart Disease	27
Depression	19
Chronic Kidney Disease	16
Asthma	6
Osteoperosis	7
Atrial Fibrilation	8
Heart Failure	15
Chronic Obstructive Pulmonary Disease	9
Diabetes	26
Dementia	5
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2015 were eye procedures, ultrasound (sonogram), lab tests and transplant procedures.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	15
doctor visit	705
excision	24
eye procedures	677
lab tests	123
removal of lesion (e.g. growth)	24
transplant procedures	47
ultrasound (sonogram)	248

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	358
Female	582

**Ethnicity**
Non-Hispanic White	892
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	346
From 75 to 84	326
85 and over	150
Less than 65	118

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2015

Hypertension	61
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	27
Depression	19
Chronic Kidney Disease	20
Asthma	9
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	26
Dementia	5
Cancer	7

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2016 were eye procedures, ultrasound (sonogram), lab tests and transplant procedures.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	19
doctor visit	672
excision	20
eye procedures	865
lab tests	102
removal of lesion (e.g. growth)	20
transplant procedures	49
ultrasound (sonogram)	381

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	160
Female	296

**Ethnicity**
Non-Hispanic White	428
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	183
From 75 to 84	155
85 and over	69
Less than 65	49

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2016

Hypertension	60
High Cholesterol	46
Stroke	0
Ischemic Heart Disease	26
Depression	16
Chronic Kidney Disease	23
Asthma	14
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	25
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2017 were eye procedures, ultrasound (sonogram), lab tests and transplant procedures.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	22
doctor visit	740
eye procedures	973
lab tests	72
transplant procedures	70
ultrasound (sonogram)	463

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	175
Female	297

**Ethnicity**
Non-Hispanic White	435
Black	0
Hispanic	0
Asian	0
Other	14
Native American	0

**Age**
From 65 to 74	199
From 75 to 84	148
85 and over	81
Less than 65	44

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2017

Hypertension	61
High Cholesterol	46
Stroke	2
Ischemic Heart Disease	27
Depression	21
Chronic Kidney Disease	23
Asthma	6
Osteoperosis	9
Atrial Fibrilation	7
Heart Failure	16
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2018 were eye procedures, ultrasound (sonogram), transplant procedures and diagnostic imaging.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

debridement (removal of unhealthy tissue)	14
diagnostic imaging	32
doctor visit	810
excision	22
eye procedures	1185
removal of lesion (e.g. growth)	22
transplant procedures	84
ultrasound (sonogram)	625

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	228
Female	324

**Ethnicity**
Non-Hispanic White	515
Black	13
Hispanic	0
Asian	0
Other	11
Native American	0

**Age**
From 65 to 74	236
From 75 to 84	166
85 and over	82
Less than 65	68

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2018

Hypertension	59
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	24
Depression	21
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	24
Dementia	6
Cancer	7

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2019 were eye procedures, ultrasound (sonogram), transplant procedures and diagnostic imaging.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	30
doctor visit	948
excision	24
eye procedures	1055
removal of lesion (e.g. growth)	24
transplant procedures	68
ultrasound (sonogram)	561

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	235
Female	358

**Ethnicity**
Non-Hispanic White	553
Black	14
Hispanic	0
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	270
From 75 to 84	180
85 and over	82
Less than 65	61

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2019

Hypertension	65
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	26
Depression	20
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	24
Dementia	6
Cancer	8

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2020 were eye procedures, ultrasound (sonogram), transplant procedures and diagnostic imaging.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	18
doctor visit	703
eye procedures	901
lacrimal (tearing system) procedures	17
transplant procedures	55
ultrasound (sonogram)	567

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	206
Female	287

**Ethnicity**
Non-Hispanic White	460
Black	0
Hispanic	0
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	239
From 75 to 84	163
85 and over	59
Less than 65	32

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2020

Hypertension	61
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	25
Depression	18
Chronic Kidney Disease	25
Asthma	6
Osteoperosis	9
Atrial Fibrilation	9
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	24
Dementia	7
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2021 were eye procedures, ultrasound (sonogram), transplant procedures and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	17
doctor visit	825
eye procedures	936
lacrimal (tearing system) procedures	22
transplant procedures	46
ultrasound (sonogram)	579

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	240
Female	312

**Ethnicity**
Non-Hispanic White	513
Black	0
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	245
From 75 to 84	188
85 and over	83
Less than 65	36

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2021

Hypertension	59
High Cholesterol	52
Stroke	3
Ischemic Heart Disease	25
Depression	20
Chronic Kidney Disease	26
Asthma	5
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	24
Dementia	7
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA during 2022 were eye procedures, ultrasound (sonogram), transplant procedures and diagnostic imaging.

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

diagnostic imaging	21
doctor visit	819
excision	16
eye procedures	1089
removal of lesion (e.g. growth)	16
transplant procedures	60
ultrasound (sonogram)	619

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	282
Female	359

**Ethnicity**
Non-Hispanic White	596
Black	11
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	300
From 75 to 84	211
85 and over	95
Less than 65	35

Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD in 2022

Hypertension	70
High Cholesterol	71
Stroke	6
Ischemic Heart Disease	22
Depression	20
Chronic Kidney Disease	21
Asthma	9
Osteoperosis	15
Atrial Fibrilation	16
Heart Failure	12
Chronic Obstructive Pulmonary Disease	12
Diabetes	27
Dementia	3
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark A. Greiner, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark A. Greiner, MD treated as an ophthalmologist in Coralville, IA were eye procedures, ultrasound (sonogram), lab tests and transplant procedures.

debridement (removal of unhealthy tissue)	14
diagnostic imaging	23
doctor visit	680
excision	20
eye procedures	851
lab tests	92
lacrimal (tearing system) procedures	22
removal of lesion (e.g. growth)	20
transplant procedures	56
ultrasound (sonogram)	414

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark A. Greiner, MD.

**Gender**
Male	195
Female	293

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	0
Non-Hispanic White	457
Hispanic	0
Native American / Alaskan Native	0
Other	8

**Age**
75 to 84	158
85 and over	74
Less than 65	48
65 to 74	207

Average of Total of Conditions of Medicare patients treated by Dr. Mark A. Greiner, MD From 2012 - 2022

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

Hypertension	54
High Cholesterol	45
Stroke	2
Ischemic Heart Disease	23
Depression	17
Chronic Kidney Disease	20
Asthma	6
Osteoporosis	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Atrial Fibrillation	9
Cancer	7
Dementia	5

Education & Training

Dr. Mark A. Greiner, MD graduated from University of California, Davis, School of Medicine in 2007. He is certified by the American Board of Ophthalmology Iowa Board of Medicine VISX Intralase and has a state license in Iowa.

Medical School: University of California, Davis, School of Medicine (2007)

Board Certification: American Board of Ophthalmology Iowa Board of Medicine VISX Intralase

Licensed In: Iowa

Affiliations & Hospitals

Dr. Mark A. Greiner, MD is associated with these hospitals and organizations:

University of Iowa

U.S. Department of Veterans Affairs

University of Iowa Health Care

Ratings & Reviews

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General Payments

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

**Payments by Company**
Allergan Inc.	$95 RESTASIS $95

**Types of Payments**
Education	$95

Biography

Dr. Mark Greiner is a medical specialist in surgery and ophthalmology (eye disease). He attended medical school at the University of California, Davis, School of Medicine. Clinical interests for Dr. Greiner include complex cataract surgery, deep anterior lamellar keratoplasty (DALK), and dry eyes. Dr. Greiner is affiliated with the University of Iowa Health Care and U.S. Department of Veterans Affairs.