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Dr. Ann Zera Tan, MD

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Specializes in: Pathology

1200 N State Street Gh Room 2900
Los Angeles, CA 90033

(323) 226-7149

Dr. Ann Zera Tan, MD is a pathologist in Los Angeles, CA specializing in pathology.

Office Locations

1200 N State Street Gh Room 2900
Los Angeles, CA 90033

(323) 226-7149

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Noteworthy Medicare Patient Procedures Performed by Dr. Ann Zera Tan, MD in 2024

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

Top 5%

By Volume:

intraoperative pathology consultation

In 2024, Dr. Ann Zera Tan, MD performed more intraoperative pathology consultation procedures for Medicare patients than 95% of providers in related specialties within California.

Top 25%

By Affordability:

immunohistochemistry test

lab tests

special stains

In 2012, Dr. Ann Zera Tan, MD had a list price for immunohistochemistry (IHC) test, lab tests, and special stains that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2012 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	117
cytology	88
lab tests	635

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2013 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	126
cytology	82
lab tests	470

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	227
Female	312

**Ethnicity**
Non-Hispanic White	78
Black	0
Hispanic	397
Asian	32
Other	0
Native American	0

**Age**
From 65 to 74	193
From 75 to 84	138
85 and over	92
Less than 65	116

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2013

Hypertension	75
High Cholesterol	67
Stroke	15
Ischemic Heart Disease	65
Depression	32
Chronic Kidney Disease	55
Asthma	10
Osteoperosis	15
Atrial Fibrilation	16
Heart Failure	42
Chronic Obstructive Pulmonary Disease	25
Diabetes	63
Dementia	24
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2014 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	140
cytology	118
lab tests	552

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	245
Female	306

**Ethnicity**
Non-Hispanic White	75
Black	0
Hispanic	435
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	208
From 75 to 84	141
85 and over	73
Less than 65	129

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2014

Hypertension	75
High Cholesterol	69
Stroke	15
Ischemic Heart Disease	62
Depression	38
Chronic Kidney Disease	52
Asthma	12
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	42
Chronic Obstructive Pulmonary Disease	23
Diabetes	64
Dementia	26
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2015 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	197
cytology	110
lab tests	357

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	462
Female	604

**Ethnicity**
Non-Hispanic White	190
Black	50
Hispanic	754
Asian	36
Other	0
Native American	0

**Age**
From 65 to 74	398
From 75 to 84	298
85 and over	130
Less than 65	240

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2015

Hypertension	75
High Cholesterol	69
Stroke	11
Ischemic Heart Disease	62
Depression	36
Chronic Kidney Disease	51
Asthma	17
Osteoperosis	15
Atrial Fibrilation	15
Heart Failure	40
Chronic Obstructive Pulmonary Disease	24
Diabetes	60
Dementia	21
Cancer	16

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2016 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	131
cytology	72
lab tests	323

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	210
Female	286

**Ethnicity**
Non-Hispanic White	67
Black	23
Hispanic	380
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	198
From 75 to 84	135
85 and over	56
Less than 65	107

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2016

Hypertension	75
High Cholesterol	64
Stroke	8
Ischemic Heart Disease	50
Depression	34
Chronic Kidney Disease	50
Asthma	25
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	35
Chronic Obstructive Pulmonary Disease	22
Diabetes	57
Dementia	19
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2017 were lab tests, cytology and consultation.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	91
cytology	95
lab tests	392

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	227
Female	333

**Ethnicity**
Non-Hispanic White	108
Black	19
Hispanic	398
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	225
From 75 to 84	142
85 and over	78
Less than 65	115

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2017

Hypertension	75
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	55
Depression	33
Chronic Kidney Disease	56
Asthma	11
Osteoperosis	16
Atrial Fibrilation	11
Heart Failure	36
Chronic Obstructive Pulmonary Disease	21
Diabetes	58
Dementia	21
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2018 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	111
cytology	51
lab tests	298

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	200
Female	275

**Ethnicity**
Non-Hispanic White	80
Black	23
Hispanic	339
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	206
From 75 to 84	116
85 and over	50
Less than 65	103

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2018

Hypertension	75
High Cholesterol	73
Stroke	9
Ischemic Heart Disease	55
Depression	31
Chronic Kidney Disease	51
Asthma	11
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	36
Chronic Obstructive Pulmonary Disease	18
Diabetes	61
Dementia	19
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2019 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	95
cytology	63
lab tests	268

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	203
Female	264

**Ethnicity**
Non-Hispanic White	89
Black	0
Hispanic	324
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	185
From 75 to 84	117
85 and over	50
Less than 65	115

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2019

Hypertension	75
High Cholesterol	71
Stroke	7
Ischemic Heart Disease	56
Depression	33
Chronic Kidney Disease	56
Asthma	7
Osteoperosis	16
Atrial Fibrilation	15
Heart Failure	39
Chronic Obstructive Pulmonary Disease	18
Diabetes	61
Dementia	21
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2020 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	141
cytology	38
lab tests	155

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	152
Female	201

**Ethnicity**
Non-Hispanic White	75
Black	21
Hispanic	237
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	164
From 75 to 84	75
85 and over	43
Less than 65	71

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2020

Hypertension	75
High Cholesterol	71
Stroke	9
Ischemic Heart Disease	52
Depression	33
Chronic Kidney Disease	57
Asthma	10
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	40
Chronic Obstructive Pulmonary Disease	20
Diabetes	60
Dementia	20
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2021 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	176
cytology	40
lab tests	202

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	161
Female	241

**Ethnicity**
Non-Hispanic White	85
Black	19
Hispanic	274
Asian	0
Other	13
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	97
85 and over	46
Less than 65	83

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	52
Depression	37
Chronic Kidney Disease	55
Asthma	12
Osteoperosis	15
Atrial Fibrilation	15
Heart Failure	43
Chronic Obstructive Pulmonary Disease	15
Diabetes	58
Dementia	23
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2022 were lab tests, consultation and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	97
cytology	32
lab tests	137

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	149
Female	204

**Ethnicity**
Non-Hispanic White	89
Black	17
Hispanic	226
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	158
From 75 to 84	107
85 and over	37
Less than 65	51

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	36
Depression	30
Chronic Kidney Disease	43
Asthma	12
Osteoperosis	21
Atrial Fibrilation	18
Heart Failure	33
Chronic Obstructive Pulmonary Disease	19
Diabetes	57
Dementia	13
Cancer	19

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2023 were consultation, lab tests and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	168
cytology	35
lab tests	97

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	159
Female	234

**Ethnicity**
Non-Hispanic White	92
Black	0
Hispanic	258
Asian	17
Other	0
Native American	0

**Age**
From 65 to 74	174
From 75 to 84	104
85 and over	42
Less than 65	73

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	38
Depression	33
Chronic Kidney Disease	41
Asthma	12
Osteoperosis	24
Atrial Fibrilation	22
Heart Failure	40
Chronic Obstructive Pulmonary Disease	20
Diabetes	58
Dementia	16
Cancer	18

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA during 2024 were consultation, lab tests and cytology.

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

consultation	161
cytology	23
lab tests	61

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Male	179
Female	197

**Ethnicity**
Non-Hispanic White	96
Black	0
Hispanic	226
Asian	26
Other	0
Native American	0

**Age**
From 65 to 74	168
From 75 to 84	97
85 and over	45
Less than 65	66

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	42
Depression	32
Chronic Kidney Disease	43
Asthma	13
Osteoperosis	19
Atrial Fibrilation	21
Heart Failure	38
Chronic Obstructive Pulmonary Disease	17
Diabetes	62
Dementia	17
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Ann Zera Tan, MD for Medicare patients.

The highest averages for the top procedures that Dr. Ann Zera Tan, MD treated as a pathologist in Los Angeles, CA were lab tests, consultation and cytology.

consultation	134
cytology	65
lab tests	303

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Ann Zera Tan, MD.

**Gender**
Female	265
Male	198

**Ethnicity**
Black / African American	13
Asian / Pacific Islander	14
Non-Hispanic White	86
Native American / Alaskan Native	0
Hispanic	326
Other	1

**Age**
75 to 84	120
85 and over	57
Less than 65	97
65 to 74	188

Average of Total of Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD From 2012 - 2024

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

Hypertension	69
High Cholesterol	65
Stroke	10
Ischemic Heart Disease	48
Depression	30
Chronic Kidney Disease	46
Asthma	11
Osteoporosis	14
Heart Failure	35
Chronic Obstructive Pulmonary Disease	18
Diabetes	55
Atrial Fibrillation	14
Dementia	18
Cancer	14

Education & Training

She has a state license in California.

Licensed In: California

Ratings & Reviews

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General Payments

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

**Payments by Company**
Beckman Coulter, Inc.	$76 UNICEL DXH $34	UNICEL DXI ACCESS $14	DXH 900 $11	$17
Roche Diagnostics Corporation	$71 TD BenchMark IHC/ISH and Special Stains Reagents $71
Merck Sharp & Dohme LLC	$66 ZERBAXA $42	RECARBRIO $23
Otsuka America Pharmaceutical, Inc.	$31 BREATHTEK $31
Tempus AI, Inc	$26 XT CDX $26
Other	$92 Fetroja $26	OCTAPLAS $19	ULTOMIRIS $16	Omniscan $16	$15

**Types of Payments**
Food and Beverage	$362

Biography

Dr. Ann Tan sees patients in Los Angeles, CA. Her medical specialty is pathology. Dr. Tan obtained a license to practice in California.

Select Year:

Dr. Ann Zera Tan, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Ann Zera Tan, MD in 2024

By Volume:

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. Ann Zera Tan, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Ann Zera Tan, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Biography

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