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Dr. Karen Shih, MD

Accepting New Patients
Specializes in: Ophthalmology (Eye Disease)
University of California, San Francisco (UCSF), School of Medicine (2004)
Professional interests include: pterygium, cataract surgery, cataracts, and more.
323 N Mathilda Avenue
Sunnyvale, CA 94085

Dr. Karen Shih, MD is an ophthalmologist in Sunnyvale, CA specializing in ophthalmology (eye disease). She graduated from University of California, San Francisco (UCSF), School of Medicine in 2004 and has 21 years of experience. Dr. Karen Shih, MD is affiliated with Brown and Toland Physicians, Sutter Health, Peninsula Eye Surgery Center and SUTTER BAY MEDICAL FOUNDATION.

View Doctor's Full Profile (408) 524-5900

Office Locations

Sutter Health

1085 West El Camino Real Level 3
Sunnyvale, CA 94087
(408) 524-5900
open_in_new
323 N Mathilda Avenue
Sunnyvale, CA 94085
(408) 524-5900
open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Karen Shih, MD in 2023

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

Top 25%

By Volume:

anterior segment surgery
extracapsular cataract extraction with IOL implantation

In 2013, Dr. Karen Shih, MD performed more anterior segment surgery, and extracapsular cataract extraction (ECCE) with IOL implantation procedures for Medicare patients than 75% of providers in related specialties within California.

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2013 were eye procedures, laser treatment, ultrasound (sonogram) and excision.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 21
doctor visit 979
excision 65
eye procedures 1301
laser treatment 134
ultrasound (sonogram) 70

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 236
Female 330
Ethnicity
Non-Hispanic White 285
Black 0
Hispanic 46
Asian 197
Other 27
Native American 0
Age
From 65 to 74 252
From 75 to 84 213
85 and over 75
Less than 65 26

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2013

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2013 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 54
High Cholesterol 51
Stroke 3
Ischemic Heart Disease 18
Depression 13
Chronic Kidney Disease 20
Asthma 4
Osteoperosis 8
Atrial Fibrilation 9
Heart Failure 7
Chronic Obstructive Pulmonary Disease 6
Diabetes 37
Dementia 7
Cancer 9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2014 were eye procedures, laser treatment, ultrasound (sonogram) and excision.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 21
doctor visit 1044
excision 47
eye procedures 1469
lacrimal (tearing system) procedures 23
laser treatment 103
ultrasound (sonogram) 47

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 236
Female 331
Ethnicity
Non-Hispanic White 279
Black 0
Hispanic 49
Asian 202
Other 26
Native American 0
Age
From 65 to 74 233
From 75 to 84 236
85 and over 78
Less than 65 20

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2014

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2014 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 56
High Cholesterol 52
Stroke 4
Ischemic Heart Disease 20
Depression 14
Chronic Kidney Disease 20
Asthma 4
Osteoperosis 9
Atrial Fibrilation 8
Heart Failure 7
Chronic Obstructive Pulmonary Disease 5
Diabetes 36
Dementia 6
Cancer 10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2015 were eye procedures, laser treatment, lacrimal (tearing system) procedures and ultrasound (sonogram).

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 31
doctor visit 1078
excision 19
eye procedures 1285
lacrimal (tearing system) procedures 44
laser treatment 97
ultrasound (sonogram) 35

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 534
Female 610
Ethnicity
Non-Hispanic White 550
Black 0
Hispanic 92
Asian 422
Other 58
Native American 0
Age
From 65 to 74 476
From 75 to 84 490
85 and over 150
Less than 65 28

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2015

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2015 were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension 52
High Cholesterol 47
Stroke 4
Ischemic Heart Disease 20
Depression 15
Chronic Kidney Disease 19
Asthma 5
Osteoperosis 8
Atrial Fibrilation 8
Heart Failure 8
Chronic Obstructive Pulmonary Disease 6
Diabetes 32
Dementia 6
Cancer 10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2016 were eye procedures, laser treatment, ultrasound (sonogram) and capsulotomy.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 27
doctor visit 718
excision 23
eye procedures 791
laser treatment 96
ultrasound (sonogram) 32

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 198
Female 249
Ethnicity
Non-Hispanic White 221
Black 11
Hispanic 41
Asian 150
Other 24
Native American 0
Age
From 65 to 74 189
From 75 to 84 187
85 and over 59
Less than 65 12

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2016

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2016 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 52
High Cholesterol 45
Stroke 0
Ischemic Heart Disease 19
Depression 17
Chronic Kidney Disease 24
Asthma 7
Osteoperosis 7
Atrial Fibrilation 8
Heart Failure 7
Chronic Obstructive Pulmonary Disease 6
Diabetes 32
Dementia 6
Cancer 9

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2017 were eye procedures, laser treatment, ultrasound (sonogram) and excision.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 30
doctor visit 1172
excision 36
eye procedures 1288
laser treatment 99
ultrasound (sonogram) 50

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 296
Female 391
Ethnicity
Non-Hispanic White 334
Black 14
Hispanic 48
Asian 240
Other 51
Native American 0
Age
From 65 to 74 283
From 75 to 84 283
85 and over 96
Less than 65 25

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2017

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2017 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 54
High Cholesterol 43
Stroke 2
Ischemic Heart Disease 19
Depression 19
Chronic Kidney Disease 27
Asthma 3
Osteoperosis 8
Atrial Fibrilation 8
Heart Failure 9
Chronic Obstructive Pulmonary Disease 6
Diabetes 34
Dementia 6
Cancer 10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2018 were eye procedures, laser treatment, capsulotomy and excision.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 32
doctor visit 1166
excision 23
eye procedures 1244
lacrimal (tearing system) procedures 16
laser treatment 91
ultrasound (sonogram) 20

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 277
Female 400
Ethnicity
Non-Hispanic White 334
Black 0
Hispanic 41
Asian 245
Other 46
Native American 0
Age
From 65 to 74 248
From 75 to 84 323
85 and over 93
Less than 65 13

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2018

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2018 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 57
High Cholesterol 50
Stroke 3
Ischemic Heart Disease 21
Depression 17
Chronic Kidney Disease 26
Asthma 4
Osteoperosis 9
Atrial Fibrilation 10
Heart Failure 8
Chronic Obstructive Pulmonary Disease 4
Diabetes 31
Dementia 6
Cancer 10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2019 were eye procedures, laser treatment, ultrasound (sonogram) and capsulotomy.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 24
doctor visit 1157
eye procedures 1192
lacrimal (tearing system) procedures 18
laser treatment 46
ultrasound (sonogram) 30

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 281
Female 383
Age
From 65 to 74 240
From 75 to 84 308
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2019

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2019 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 53
High Cholesterol 46
Stroke 3
Ischemic Heart Disease 20
Depression 16
Chronic Kidney Disease 25
Asthma 5
Osteoperosis 10
Atrial Fibrilation 8
Heart Failure 7
Chronic Obstructive Pulmonary Disease 5
Diabetes 30
Dementia 7
Cancer 9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2020 were eye procedures and laser treatment.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

doctor visit 685
eye procedures 656
laser treatment 20

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 191
Female 255
Ethnicity
Non-Hispanic White 218
Black 0
Hispanic 0
Asian 152
Other 38
Native American 0
Age
From 65 to 74 160
From 75 to 84 214
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2020

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2020 were high cholesterol, hypertension, diabetes and chronic kidney disease.

Hypertension 47
High Cholesterol 47
Stroke 2
Ischemic Heart Disease 20
Depression 13
Chronic Kidney Disease 25
Asthma 3
Osteoperosis 7
Atrial Fibrilation 9
Heart Failure 9
Chronic Obstructive Pulmonary Disease 6
Diabetes 32
Dementia 7
Cancer 10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2021 were eye procedures, laser treatment, capsulotomy and ultrasound (sonogram).

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 29
doctor visit 1033
eye procedures 1285
laser treatment 78
ultrasound (sonogram) 13

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 232
Female 346
Ethnicity
Non-Hispanic White 287
Black 0
Hispanic 0
Asian 198
Other 54
Native American 0
Age
From 65 to 74 209
From 75 to 84 269
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2021

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2021 were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 54
High Cholesterol 52
Stroke 0
Ischemic Heart Disease 20
Depression 11
Chronic Kidney Disease 24
Asthma 3
Osteoperosis 11
Atrial Fibrilation 7
Heart Failure 6
Chronic Obstructive Pulmonary Disease 4
Diabetes 32
Dementia 5
Cancer 9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2022 were eye procedures, laser treatment, capsulotomy and excision.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 46
doctor visit 1051
excision 24
eye procedures 1282
laser treatment 110

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 228
Female 378
Ethnicity
Non-Hispanic White 291
Black 0
Hispanic 0
Asian 214
Other 54
Native American 0
Age
From 65 to 74 199
From 75 to 84 292
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2022

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2022 were high cholesterol, hypertension, diabetes and chronic kidney disease.

Hypertension 67
High Cholesterol 71
Stroke 4
Ischemic Heart Disease 17
Depression 11
Chronic Kidney Disease 20
Asthma 8
Osteoperosis 19
Atrial Fibrilation 12
Heart Failure 7
Chronic Obstructive Pulmonary Disease 5
Diabetes 33
Dementia 4
Cancer 15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA during 2023 were eye procedures, laser treatment and capsulotomy.

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

capsulotomy 28
doctor visit 895
eye procedures 1140
laser treatment 52

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 217
Female 314
Ethnicity
Non-Hispanic White 279
Black 0
Hispanic 0
Asian 172
Other 40
Native American 0
Age
From 65 to 74 160
From 75 to 84 263
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Karen Shih, MD in 2023

The most common conditions of Medicare patients that Dr. Karen Shih, MD treated during 2023 were high cholesterol, hypertension, diabetes and chronic kidney disease.

Hypertension 69
High Cholesterol 72
Stroke 6
Ischemic Heart Disease 15
Depression 11
Chronic Kidney Disease 21
Asthma 6
Osteoperosis 19
Atrial Fibrilation 14
Heart Failure 8
Chronic Obstructive Pulmonary Disease 6
Diabetes 31
Dementia 3
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Karen Shih, MD for Medicare patients.

The highest averages for the top procedures that Dr. Karen Shih, MD treated as an ophthalmologist in Sunnyvale, CA were eye procedures, laser treatment, ultrasound (sonogram) and excision.

capsulotomy 28
doctor visit 998
excision 33
eye procedures 1175
lacrimal (tearing system) procedures 25
laser treatment 84
ultrasound (sonogram) 37

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Karen Shih, MD.

Gender
Male 266
Female 362
Ethnicity
Black / African American 2
Asian / Pacific Islander 199
Non-Hispanic White 279
Native American / Alaskan Native 0
Hispanic 28
Other 38
Age
75 to 84 279
85 and over 50
Less than 65 11
65 to 74 240

Average of Total of Conditions of Medicare patients treated by Dr. Karen Shih, MD From 2013 - 2023

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

Hypertension 55
High Cholesterol 52
Stroke 2
Ischemic Heart Disease 19
Depression 14
Chronic Kidney Disease 22
Asthma 4
Osteoporosis 10
Heart Failure 7
Chronic Obstructive Pulmonary Disease 5
Diabetes 32
Atrial Fibrillation 9
Cancer 10
Dementia 5

Education & Training

Dr. Karen Shih, MD graduated from University of California, San Francisco (UCSF), School of Medicine in 2004. She completed residency at Jules Stein Eye Institute. She is certified by the American Board of Ophthalmology and has a state license in California.

Medical School: University of California, San Francisco (UCSF), School of Medicine (2004)

Residency: Jules Stein Eye Institute (2008)

Board Certification: American Board of Ophthalmology

Licensed In: California

Affiliations & Hospitals

Dr. Karen Shih, MD is associated with these hospitals and organizations:

Brown and Toland Physicians
Sutter Health
Peninsula Eye Surgery Center
SUTTER BAY MEDICAL FOUNDATION

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. Karen Shih, MD appears to accept the following insurance providers: WellCare, Blue Shield of California, Medicare Advantage, HealthSmart, MultiPlan, United Healthcare, TRICARE, Cigna, Alliance PPO, Anthem Blue Cross of California, Private Healthcare Systems (PHCS), Accepted Central California Alliance for Health Plans: TotalCare (HMO D-SNP), Accepted Valley Health Plan - Currently in Contract Negotiations Plans: Classic Commercial HMO Plan only, Accepted SCAN Plans: SCAN Compass (HMO), Accepted Santa Clara Family Health Plan Plans: DualConnect (HMO D-SNP), Accepted Provider Networks of America Plans: PPO, Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO, Accepted Chinese Community Health Plan Plans: Active Choice- PPO Silver: Amber 50 HMO Silver: American Indian/Alaskan Native (Covered CA for Individual & Families): Bronze 60 HDHP HMO (including... and Accepted Aetna Plans: Aetna Choice POS II: Aetna Select EPO: Aetna Select Open Access: Aetna Signature Administrators (ASA): Aetna Student Health Program: Health Fund HMO (aka HMO/HRA): Health Fund....

Insurance Accepted by Provider includes:

According to our sources, Dr. Karen Shih, MD accepts the following insurance providers:

WellCare
Blue Shield of California
Medicare Advantage
HealthSmart
MultiPlan
United Healthcare
TRICARE
Cigna
Alliance PPO
Anthem Blue Cross of California
Private Healthcare Systems (PHCS)
Accepted Central California Alliance for Health Plans: TotalCare (HMO D-SNP)
Accepted Valley Health Plan - Currently in Contract Negotiations Plans: Classic Commercial HMO Plan only
Accepted SCAN Plans: SCAN Compass (HMO)
Accepted Santa Clara Family Health Plan Plans: DualConnect (HMO D-SNP)
Accepted Provider Networks of America Plans: PPO
Accepted Sutter Health Plan Plans: Individual and Family Plan HMO: Large and Small Group HMO
Accepted Chinese Community Health Plan Plans: Active Choice- PPO Silver: Amber 50 HMO Silver: American Indian/Alaskan Native (Covered CA for Individual & Families): Bronze 60 HDHP HMO (including...
Accepted Aetna Plans: Aetna Choice POS II: Aetna Select EPO: Aetna Select Open Access: Aetna Signature Administrators (ASA): Aetna Student Health Program: Health Fund HMO (aka HMO/HRA): Health Fund...

Ratings & Reviews

Dr. Karen Shih, MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 368 ratings. We collect ratings and reviews of Dr. Karen Shih, MD from all over the web to help you find the right in Sunnyvale, CA. 

4.9
Overall Rating
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General Payments

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

Payments by Company
Alcon Vision LLC $155
$155
Bausch and Lomb Inc. $143 LOTEMAX GEL
$143
Abbott Laboratories $74 Optics
$74
Johnson & Johnson Surgical Vision, Inc. $41
$41
Allergan Inc. $23 LUMIGAN
$23
Other $42 None Specified
$19 		Ilevro
$10
$13
Types of Payments
Food and Beverage $446
Gift $19
Travel and Lodging $12

Biography

Dr. Karen Shih's specialty is ophthalmology (eye disease). Patient ratings for Dr. Shih average 5.0 stars (out of 5). Her areas of expertise include the following: pterygium, cataract surgery, and cataracts. Her professional affiliations include Brown and Toland Physicians and Sutter Health. Dr. Shih appears to be an in-network provider for Anthem, Blue California, and HealthSmart, in addition to other insurance carriers. Her practice in Sunnyvale, CA is open to new patients as reported by Brown and Toland Physicians. She is a graduate of the University of California, San Francisco (UCSF), School of Medicine and a graduate of Jules Stein Eye Institute's residency program. In addition to English, Dr. Shih (or staff) speaks Mandarin and Spanish.

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