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Home > CA Providers

Dr. Clark S. Tsai, MD

Accepting New Patients

(4 Ratings)

Specializes in: Glaucoma

Albert Einstein College of Medicine of Yeshiva University

Professional interests include: glaucoma

388 9th Street Suite 230
Oakland, CA 94607

(510) 893-2020

Dr. Clark S. Tsai, MD is an ophthalmologist in Concord, CA specializing in glaucoma. He graduated from Albert Einstein College of Medicine of Yeshiva University. Dr. Clark S. Tsai, MD is affiliated with Sutter Health, John Muir Health and Hill Physicians.

Office Locations

John Muir Health

2225 Port Chicago Highway
Concord, CA 94520

(925) 689-7744

(925) 689-7748

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2700 Grant Street Suite 100
Concord, CA 94520

(925) 689-7744

(925) 689-7748

open_in_new

3242 Telegraph Avenue
Oakland, CA 94609

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John Muir Health

388 9th Street Suite 230
Oakland, CA 94607

(510) 893-2020

(510) 832-8081

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Noteworthy Medicare Patient Procedures Performed by Dr. Clark S. Tsai, MD in 2023

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

Top 5%

By Volume:

anterior segment ultrasound

eye procedures

ophthalmic ultrasound

serial tonometry

ultrasound corneal pachymetry

By Affordability:

anterior segment ultrasound

In 2023, among providers in related specialties within California, Dr. Clark S. Tsai, MD performed more anterior segment ultrasound, eye procedures, ophthalmic ultrasound, serial tonometry, and ultrasound corneal pachymetry procedures for Medicare patients than 95% of them and he also had a list price for anterior segment ultrasound, emergency care, emergency room (ER) care, punctal ablation, and punctal ligation 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:

punctal occlusion

By Affordability:

A-scan

In 2023, among providers in related specialties within California, Dr. Clark S. Tsai, MD performed more punctal occlusion procedures for Medicare patients than 90% of them and he also had a list price for A-scan that was lower than the list prices billed to Medicare by 90% 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:

laser iridectomy

laser iridotomy

punctal ablation

SCODI of the posterior segment

By Affordability:

B-scan

comprehensive eye exam

punctal plug insertion

In 2012, among providers in related specialties within California, Dr. Clark S. Tsai, MD performed more laser iridectomy, laser iridotomy, punctal ablation, and SCODI of the posterior segment (SCODI-P) procedures for Medicare patients than 75% of them and he also had a list price for B-scan, comprehensive eye exam, diagnostic B-scan, diagnostic imaging, extraocular surgery, lacrimal surgery, lacrimal (tearing system) procedures, ophthalmic biometry, punctal occlusion, and punctal plug insertion 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

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2012 were eye procedures, ultrasound (sonogram), tonometry and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	196
capsulotomy	34
doctor visit	830
excision	166
eye procedures	13702
foreign body removal	19
lacrimal (tearing system) procedures	472
laser treatment	183
photocoagulation	27
plastic surgery procedures	20
removal of lesion (e.g. growth)	17
tonometry	1058
ultrasound (sonogram)	2359

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2013 were eye procedures, ultrasound (sonogram), tonometry and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	199
capsulotomy	53
doctor visit	398
excision	148
eye procedures	14766
foreign body removal	21
lacrimal (tearing system) procedures	568
laser treatment	203
photocoagulation	28
plastic surgery procedures	19
removal of lesion (e.g. growth)	30
tonometry	1045
ultrasound (sonogram)	2412

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	643
Female	880

**Ethnicity**
Non-Hispanic White	738
Black	145
Hispanic	112
Asian	473
Other	0
Native American	0

**Age**
From 65 to 74	600
From 75 to 84	540
85 and over	251
Less than 65	132

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2013

Hypertension	72
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	28
Depression	15
Chronic Kidney Disease	23
Asthma	7
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	38
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2014 were eye procedures, ultrasound (sonogram), tonometry and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	167
capsulotomy	38
diagnostic imaging	15
doctor visit	24
excision	76
eye procedures	10419
foreign body removal	13
lacrimal (tearing system) procedures	454
laser treatment	95
photocoagulation	22
plastic surgery procedures	52
removal of lesion (e.g. growth)	19
tonometry	589
ultrasound (sonogram)	680

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	517
Female	712

**Ethnicity**
Non-Hispanic White	629
Black	69
Hispanic	103
Asian	392
Other	36
Native American	0

**Age**
From 65 to 74	492
From 75 to 84	428
85 and over	201
Less than 65	108

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2014

Hypertension	70
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	25
Depression	16
Chronic Kidney Disease	24
Asthma	5
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	15
Chronic Obstructive Pulmonary Disease	11
Diabetes	38
Dementia	9
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2015 were eye procedures, lacrimal (tearing system) procedures, ultrasound (sonogram) and ablation.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	196
capsulotomy	35
doctor visit	16
excision	97
eye procedures	10010
foreign body removal	14
lacrimal (tearing system) procedures	500
laser treatment	92
photocoagulation	21
plastic surgery procedures	42
removal of lesion (e.g. growth)	40
tonometry	49
ultrasound (sonogram)	351

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	1062
Female	1518

**Ethnicity**
Non-Hispanic White	1140
Black	188
Hispanic	220
Asian	926
Other	0
Native American	0

**Age**
From 65 to 74	1046
From 75 to 84	882
85 and over	434
Less than 65	218

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2015

Hypertension	70
High Cholesterol	58
Stroke	4
Ischemic Heart Disease	25
Depression	15
Chronic Kidney Disease	26
Asthma	9
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	37
Dementia	8
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2016 were eye procedures, ultrasound (sonogram), lacrimal (tearing system) procedures and evoked potential test.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	194
capsulotomy	51
cyst removal	12
diagnostic imaging	25
doctor visit	28
evoked potential test	558
excision	110
eye procedures	11140
foreign body removal	23
lacrimal (tearing system) procedures	566
laser treatment	150
photocoagulation	31
plastic surgery procedures	38
removal of lesion (e.g. growth)	31
tonometry	147
ultrasound (sonogram)	576

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	511
Female	776

**Ethnicity**
Non-Hispanic White	530
Black	120
Hispanic	108
Asian	472
Other	0
Native American	0

**Age**
From 65 to 74	509
From 75 to 84	432
85 and over	226
Less than 65	120

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2016

Hypertension	73
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	24
Depression	14
Chronic Kidney Disease	31
Asthma	12
Osteoperosis	9
Atrial Fibrilation	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	10
Diabetes	37
Dementia	8
Cancer	9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2017 were eye procedures, evoked potential test, ultrasound (sonogram) and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	213
capsulotomy	17
diagnostic imaging	32
doctor visit	23
evoked potential test	1048
excision	133
eye procedures	12628
foreign body removal	19
lacrimal (tearing system) procedures	499
laser treatment	135
plastic surgery procedures	18
removal of lesion (e.g. growth)	15
tonometry	166
ultrasound (sonogram)	895

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	594
Female	919

**Ethnicity**
Non-Hispanic White	545
Black	205
Hispanic	106
Asian	598
Other	0
Native American	0

**Age**
From 65 to 74	601
From 75 to 84	527
85 and over	241
Less than 65	144

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2017

Hypertension	72
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	22
Depression	16
Chronic Kidney Disease	34
Asthma	8
Osteoperosis	10
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	39
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2018 were eye procedures, evoked potential test, ultrasound (sonogram) and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	238
capsulotomy	50
diagnostic imaging	37
doctor visit	29
emergency care	20
evoked potential test	1141
excision	129
eye procedures	13448
foreign body removal	14
lacrimal (tearing system) procedures	565
laser treatment	194
photocoagulation	20
removal of lesion (e.g. growth)	15
tonometry	276
ultrasound (sonogram)	820

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	616
Female	912

**Ethnicity**
Non-Hispanic White	485
Black	191
Hispanic	126
Asian	677
Other	0
Native American	0

**Age**
From 65 to 74	612
From 75 to 84	528
85 and over	264
Less than 65	124

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2018

Hypertension	71
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	22
Depression	16
Chronic Kidney Disease	34
Asthma	7
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	14
Chronic Obstructive Pulmonary Disease	12
Diabetes	39
Dementia	11
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2019 were eye procedures, tonometry, evoked potential test and ultrasound (sonogram).

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	314
capsulotomy	26
diagnostic imaging	69
doctor visit	11
emergency care	29
evoked potential test	1097
excision	109
eye procedures	14593
foreign body removal	11
lacrimal (tearing system) procedures	752
laser treatment	116
removal of lesion (e.g. growth)	19
tonometry	1564
ultrasound (sonogram)	1091

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	590
Female	854

**Ethnicity**
Non-Hispanic White	455
Black	165
Hispanic	123
Asian	655
Other	46
Native American	0

**Age**
From 65 to 74	592
From 75 to 84	477
85 and over	256
Less than 65	119

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2019

Hypertension	75
High Cholesterol	61
Stroke	4
Ischemic Heart Disease	23
Depression	16
Chronic Kidney Disease	34
Asthma	6
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	42
Dementia	11
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2020 were eye procedures, ultrasound (sonogram), tonometry and evoked potential test.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	184
capsulotomy	19
diagnostic imaging	38
doctor visit	18
emergency care	35
evoked potential test	634
excision	75
eye procedures	10033
foreign body removal	14
lacrimal (tearing system) procedures	502
laser treatment	94
tonometry	802
ultrasound (sonogram)	1205

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	480
Female	695

**Ethnicity**
Non-Hispanic White	398
Black	135
Hispanic	103
Asian	495
Other	44
Native American	0

**Age**
From 65 to 74	495
From 75 to 84	374
85 and over	216
Less than 65	90

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2020

Hypertension	74
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	23
Depression	17
Chronic Kidney Disease	33
Asthma	6
Osteoperosis	11
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	9
Diabetes	41
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2021 were eye procedures, lacrimal (tearing system) procedures, ultrasound (sonogram) and ablation.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	173
capsulotomy	43
cyst removal	12
diagnostic imaging	35
doctor visit	14
emergency care	32
evoked potential test	13
excision	80
eye procedures	9619
foreign body removal	12
injections	49
lacrimal (tearing system) procedures	539
laser treatment	96
removal of lesion (e.g. growth)	27
tonometry	88
ultrasound (sonogram)	403

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	472
Female	715

**Ethnicity**
Non-Hispanic White	422
Black	132
Hispanic	103
Asian	480
Other	0
Native American	0

**Age**
From 65 to 74	503
From 75 to 84	383
85 and over	209
Less than 65	92

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2021

Hypertension	72
High Cholesterol	63
Stroke	5
Ischemic Heart Disease	23
Depression	16
Chronic Kidney Disease	33
Asthma	6
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	9
Diabetes	40
Dementia	10
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA during 2022 were eye procedures, ultrasound (sonogram), tonometry and lacrimal (tearing system) procedures.

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

ablation	231
capsulotomy	42
cyst removal	15
diagnostic imaging	24
emergency care	19
excision	60
eye procedures	11489
foreign body removal	18
injections	120
lacrimal (tearing system) procedures	562
laser treatment	87
removal of lesion (e.g. growth)	15
tonometry	734
ultrasound (sonogram)	1274

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	447
Female	689

**Ethnicity**
Non-Hispanic White	373
Black	106
Hispanic	108
Asian	499
Other	50
Native American	0

**Age**
From 65 to 74	487
From 75 to 84	351
85 and over	223
Less than 65	75

Conditions of Medicare patients treated by Dr. Clark S. Tsai, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	18
Depression	16
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	18
Atrial Fibrilation	12
Heart Failure	11
Chronic Obstructive Pulmonary Disease	12
Diabetes	41
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Clark S. Tsai, MD for Medicare patients.

The highest averages for the top procedures that Dr. Clark S. Tsai, MD treated as an ophthalmologist in Concord, CA were eye procedures, ultrasound (sonogram), evoked potential test and tonometry.

ablation	209
capsulotomy	37
cyst removal	13
diagnostic imaging	34
doctor visit	139
emergency care	27
evoked potential test	748
excision	107
eye procedures	11986
foreign body removal	16
injections	84
lacrimal (tearing system) procedures	543
laser treatment	131
photocoagulation	24
plastic surgery procedures	31
removal of lesion (e.g. growth)	22
tonometry	592
ultrasound (sonogram)	1096

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Clark S. Tsai, MD.

**Gender**
Male	539
Female	788

**Ethnicity**
Black / African American	132
Asian / Pacific Islander	515
Non-Hispanic White	519
Native American / Alaskan Native	0
Hispanic	110
Other	16

**Age**
75 to 84	447
85 and over	229
Less than 65	111
65 to 74	539

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

The highest averages of the most common conditions of Medicare patients that Dr. Clark S. Tsai, MD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	65
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	21
Depression	14
Chronic Kidney Disease	26
Asthma	7
Osteoporosis	9
Heart Failure	12
Chronic Obstructive Pulmonary Disease	9
Diabetes	35
Atrial Fibrillation	8
Dementia	8
Cancer	8

Education & Training

Dr. Clark S. Tsai, MD graduated from Albert Einstein College of Medicine of Yeshiva University. He completed residency at Kresge Eye Institute. He is certified by the Certification: American Board of Ophthalmology and has a state license in California.

Medical School: Albert Einstein College of Medicine of Yeshiva University

Residency: Kresge Eye Institute

Board Certification: Certification: American Board of Ophthalmology

Licensed In: California

Affiliations & Hospitals

Dr. Clark S. Tsai, MD is associated with these hospitals and organizations:

Sutter Health

John Muir Health

Hill Physicians

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. Clark S. Tsai, MD appears to accept the following insurance providers: Cigna, Aetna, Blue Shield of California, SCAN Health Plan, Anthem, UnitedHealthcare, Health Net, Humana, Hill Physicians Care Solutions, Central Health Plan, CCHP Health Plan (Chinese Community Health Plan) and Canopy Health.

Insurance Accepted by Provider includes:

According to our sources, Dr. Clark S. Tsai, MD accepts the following insurance providers:

Cigna

Aetna

Blue Shield of California

SCAN Health Plan

Anthem

UnitedHealthcare

Health Net

Humana

Hill Physicians Care Solutions

Central Health Plan

CCHP Health Plan (Chinese Community Health Plan)

Canopy Health

Ratings & Reviews

Dr. Clark S. Tsai, MD has a high overall rating with an average of 3.75 out of 5 stars based on 4 ratings. We collect ratings and reviews of Dr. Clark S. Tsai, MD from all over the web to help you find the right in Concord, CA.

3.75

Overall Rating

(4 Ratings)

Leave a Review

Reviews Left On DocSpot

Overall Rating: 1.0 2025-03-28

My appointment was for 7:30 am,  I got there 7:15 and the Dr. leisurely walked in at 8:35. Then tells me that I need to schedule another appointment to be seen for what I was there. The office was well aware of why I was coming in. Went in there for stye to be drained and his talking to me about glaucoma. I left the office and he calls me to come back….I absolutely didn’t feel comfortable him working on my eye at that point.  Not going back there again.

General Payments

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

**Payments by Company**
Bio-Rad Laboratories, Inc.	$2,755 Others $870	$1,885
MacuLogix, Inc.	$1,696 AdaptDx $16	$1,680
Allergan Inc.	$1,379 COMBIGAN $565	RESTASIS $283	LUMIGAN $144	ALPHAGAN P $133	$254
Iridex Corporation	$606 $606
Abbott Laboratories	$606 Healon Viscoelastics $261	Medical Optics $121	SCS IPGs $119	Optics $105
Other	$3,701 Rhopressa $247	XIIDRA $186	IOLMaster 500 $155	RESTASIS $140	Cataract Equipment $140	Other $2,832

**Types of Payments**
Food and Beverage	$5,143
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$3,235
Gift	$1,699
Honoraria	$500
Consulting Fee	$100
Other	$65

Research Payments

Dr. Clark S. Tsai, MD has received 1 research payments totaling $6,000.

Biography

Dr. Clark Tsai is a glaucoma specialist. Patient reviews placed him at an average of 3.5 stars (out of 5). Clinical interests for Dr. Tsai include glaucoma. Dr. Tsai can take several insurance carriers, including Blue Shield, Health Net, and Anthem. He attended Albert Einstein College of Medicine of Yeshiva University for medical school and subsequently trained at Kresge Eye Institute for residency. Dr. Tsai (or staff) is conversant in Mandarin, Spanish, and Cantonese. Dr. Tsai is affiliated with Alta Bates Summit Medical Center - Summit Campus, Hill Physicians, and John Muir Medical Center, Concord. According to John Muir Health, new patients are welcome to contact his office in Concord, CA.