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Dr. William Chunghun Sim, MD

(No ratings)

Specializes in: Internal Medicine (Adult Medicine)

11480 Brookshire Avenue 200
Downey, CA 90241

(562) 806-0874

Dr. William Chunghun Sim, MD is an internist in Downey, CA specializing in internal medicine (adult medicine).

Office Locations

11480 Brookshire Avenue 200
Downey, CA 90241

(562) 806-0874

(562) 927-4801

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2012 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	34
doctor visit	2081
ear procedures	12
hospital care	545
injections	34
inpatient care	545
lab tests	41
nursing home care	71
preventive care	131
vaccines	131

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2013 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	36
doctor visit	2183
hospital care	333
injections	36
inpatient care	333
lab tests	47
nursing home care	45
preventive care	161
vaccines	161

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	176
Female	249

**Ethnicity**
Non-Hispanic White	251
Black	0
Hispanic	107
Asian	56
Other	0
Native American	0

**Age**
From 65 to 74	162
From 75 to 84	150
85 and over	84
Less than 65	29

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2013

Hypertension	74
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	40
Depression	13
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	20
Chronic Obstructive Pulmonary Disease	10
Diabetes	35
Dementia	14
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2014 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	34
doctor visit	2098
hospital care	252
injections	34
inpatient care	252
lab tests	64
nursing home care	47
preventive care	194
vaccines	194

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	177
Female	250

**Ethnicity**
Non-Hispanic White	246
Black	0
Hispanic	105
Asian	63
Other	0
Native American	0

**Age**
From 65 to 74	173
From 75 to 84	155
85 and over	77
Less than 65	22

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2014

Hypertension	68
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	38
Depression	10
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	6
Diabetes	38
Dementia	13
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2015 were preventive care, vaccines, hospital care and inpatient care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	58
doctor visit	2000
hospital care	247
injections	58
inpatient care	247
lab tests	98
nursing home care	43
preventive care	254
vaccines	254

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	394
Female	516

**Ethnicity**
Non-Hispanic White	504
Black	0
Hispanic	222
Asian	142
Other	0
Native American	0

**Age**
From 65 to 74	364
From 75 to 84	312
85 and over	170
Less than 65	64

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2015

Hypertension	73
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	35
Depression	11
Chronic Kidney Disease	24
Asthma	10
Osteoperosis	6
Atrial Fibrilation	10
Heart Failure	15
Chronic Obstructive Pulmonary Disease	7
Diabetes	47
Dementia	14
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2016 were chronic care, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	53
chronic care	577
doctor visit	2088
hospital care	212
injections	53
inpatient care	212
lab tests	78
nursing home care	31
preventive care	191
vaccines	191

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	200
Female	263

**Ethnicity**
Non-Hispanic White	270
Black	0
Hispanic	117
Asian	59
Other	0
Native American	0

**Age**
From 65 to 74	181
From 75 to 84	147
85 and over	104
Less than 65	31

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	36
Depression	12
Chronic Kidney Disease	46
Asthma	11
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	7
Diabetes	49
Dementia	14
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2017 were chronic care, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	54
chronic care	623
doctor visit	1915
hospital care	284
injections	54
inpatient care	284
lab tests	60
nursing home care	18
preventive care	167
vaccines	167

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	196
Female	249

**Ethnicity**
Non-Hispanic White	249
Black	0
Hispanic	116
Asian	63
Other	0
Native American	0

**Age**
From 65 to 74	182
From 75 to 84	154
85 and over	81
Less than 65	28

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2017

Hypertension	73
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	33
Depression	9
Chronic Kidney Disease	55
Asthma	8
Osteoperosis	5
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	7
Diabetes	51
Dementia	14
Cancer	10

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2018 were preventive care, vaccines, chronic care and hospital care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	58
chronic care	170
doctor visit	1809
hospital care	136
injections	58
inpatient care	136
lab tests	63
preventive care	193
vaccines	193

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	183
Female	229

**Ethnicity**
Non-Hispanic White	233
Black	0
Hispanic	99
Asian	62
Other	0
Native American	0

**Age**
From 65 to 74	170
From 75 to 84	146
85 and over	70
Less than 65	26

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2018

Hypertension	73
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	31
Depression	10
Chronic Kidney Disease	68
Asthma	9
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	5
Diabetes	66
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2019 were chronic care, preventive care, vaccines and hospital care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	45
chronic care	318
doctor visit	2085
hospital care	135
injections	45
inpatient care	135
lab tests	82
preventive care	198
vaccines	198

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	189
Female	353

**Ethnicity**
Non-Hispanic White	245
Black	0
Hispanic	109
Asian	166
Other	0
Native American	0

**Age**
From 65 to 74	180
From 75 to 84	170
85 and over	163
Less than 65	29

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2019

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	34
Depression	15
Chronic Kidney Disease	72
Asthma	11
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	34
Chronic Obstructive Pulmonary Disease	10
Diabetes	73
Dementia	26
Cancer	8

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2020 were chronic care, preventive care, vaccines and hospital care.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	14
chronic care	484
doctor visit	2625
hospital care	104
injections	14
inpatient care	104
lab tests	68
nursing home care	21
preventive care	140
vaccines	140

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	179
Female	362

**Ethnicity**
Non-Hispanic White	222
Black	12
Hispanic	109
Asian	186
Other	12
Native American	0

**Age**
From 65 to 74	175
From 75 to 84	167
85 and over	176
Less than 65	23

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	34
Depression	15
Chronic Kidney Disease	71
Asthma	9
Osteoperosis	14
Atrial Fibrilation	10
Heart Failure	36
Chronic Obstructive Pulmonary Disease	9
Diabetes	75
Dementia	31
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2021 were chronic care, lab tests, aspiration and injections.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	33
chronic care	351
doctor visit	2073
injections	33
lab tests	63

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	185
Female	302

**Ethnicity**
Non-Hispanic White	220
Black	0
Hispanic	104
Asian	142
Other	0
Native American	0

**Age**
From 65 to 74	174
From 75 to 84	165
85 and over	123
Less than 65	25

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	31
Depression	16
Chronic Kidney Disease	71
Asthma	7
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	26
Chronic Obstructive Pulmonary Disease	5
Diabetes	75
Dementia	25
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2022 were chronic care, aspiration, injections and lab tests.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	63
chronic care	232
doctor visit	3056
injections	63
lab tests	55

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	254
Female	446

**Ethnicity**
Non-Hispanic White	291
Black	16
Hispanic	140
Asian	240
Other	13
Native American	0

**Age**
From 65 to 74	219
From 75 to 84	230
85 and over	202
Less than 65	49

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	23
Depression	31
Chronic Kidney Disease	21
Asthma	10
Osteoperosis	21
Atrial Fibrilation	19
Heart Failure	19
Chronic Obstructive Pulmonary Disease	12
Diabetes	72
Dementia	35
Cancer	12

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2023 were chronic care, lab tests, aspiration and injections.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	49
chronic care	325
doctor visit	3613
injections	49
lab tests	63

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	274
Female	449

**Ethnicity**
Non-Hispanic White	280
Black	11
Hispanic	131
Asian	283
Other	18
Native American	0

**Age**
From 65 to 74	207
From 75 to 84	241
85 and over	238
Less than 65	37

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	24
Depression	33
Chronic Kidney Disease	21
Asthma	11
Osteoperosis	24
Atrial Fibrilation	18
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	75
Dementia	37
Cancer	11

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA during 2024 were chronic care, aspiration, injections and lab tests.

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

aspiration	53
chronic care	215
doctor visit	3739
injections	53
lab tests	47

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Male	309
Female	478

**Ethnicity**
Non-Hispanic White	285
Black	13
Hispanic	148
Asian	326
Other	15
Native American	0

**Age**
From 65 to 74	217
From 75 to 84	253
85 and over	282
Less than 65	35

Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	22
Depression	35
Chronic Kidney Disease	22
Asthma	11
Osteoperosis	21
Atrial Fibrilation	18
Heart Failure	27
Chronic Obstructive Pulmonary Disease	12
Diabetes	75
Dementia	42
Cancer	10

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. William Chunghun Sim, MD for Medicare patients.

The highest averages for the top procedures that Dr. William Chunghun Sim, MD treated as an internist in Downey, CA were chronic care, hospital care, inpatient care and preventive care.

aspiration	44
chronic care	366
doctor visit	2412
ear procedures	12
hospital care	249
injections	44
inpatient care	249
lab tests	63
nursing home care	39
preventive care	181
vaccines	181

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. William Chunghun Sim, MD.

**Gender**
Female	318
Male	208

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	137
Non-Hispanic White	253
Native American / Alaskan Native	0
Hispanic	115
Other	4

**Age**
75 to 84	176
85 and over	136
Less than 65	30
65 to 74	184

Average of Total of Conditions of Medicare patients treated by Dr. William Chunghun Sim, MD From 2012 - 2024

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

Hypertension	68
High Cholesterol	69
Stroke	5
Ischemic Heart Disease	29
Depression	16
Chronic Kidney Disease	39
Asthma	8
Osteoporosis	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	7
Diabetes	56
Atrial Fibrillation	11
Dementia	21
Cancer	9

Education & Training

He 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. William Chunghun Sim, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
AstraZeneca Pharmaceuticals LP	$1,821 FARXIGA $1,048	SYMBICORT $196	BREZTRI $115	AIRSUPRA $88	CRESTOR $61	Other $312
AbbVie Inc.	$1,399 Synthroid $328	UBRELVY $285	VRAYLAR $228	QULIPTA $221	Creon $171	Other $167
Lilly USA, LLC	$1,369 MOUNJARO $386	JARDIANCE $336	REYVOW $118	ZEPBOUND $116	GLYXAMBI $96	Other $317
GlaxoSmithKline, LLC.	$1,368 TRELEGY ELLIPTA $553	AREXVY $337	TANZEUM $160	BREO $89	ANORO $69	Other $159
Novo Nordisk Inc	$1,034 Victoza $251	Ozempic $205	RYBELSUS $170	Wegovy $101	Tresiba $99	Other $208
Other	$11,619 JARDIANCE $397	Vascepa $386	XIFAXAN $361	Kerendia $313	STEGLATRO $294	Other $9,868