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Dr. Timothy W. Chang, MD

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Specializes in: MOHS-Micrographic Surgery

Medical College of Wisconsin (2012)

Professional interests include: skin issues

9850 Genesee Avenue Suite 850
La Jolla, CA 92037

(858) 657-0267

Dr. Timothy W. Chang, MD is a mohs skin cancer surgeon in La Jolla, CA specializing in mohs-micrographic surgery. He graduated from Medical College of Wisconsin in 2012 and has 13 years of experience. Dr. Timothy W. Chang, MD is affiliated with Scripps Memorial Hospital La Jolla, Scripps Health and COASTAL MEDICAL AND COSMETIC DERMATOLOGY INC.

Office Locations

Scripps Health

9850 Genesee Avenue Suite 850
La Jolla, CA 92037

(858) 657-0267

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Some issues Dr. Timothy W. Chang, MD can help you with:

Skin Issues

The skin is the largest organ in the body, protecting and covering the more sensitive inner organs. Considering its size and that it is constantly exposed to the elements, the skin is usually relatively problem-free. However that doesn't mean that issues don't come up from time to time that might need the help of a professional. The most common skin issues that people seek medical help with are cosmetic issues, acne, eczema, dermatitis, psoriasis, and skin growths.

Professional cosmetic skin treatments exist to treat wrinkles, scars, dark spots, remove excess hair, tone and tighten skin, and otherwise improve the appearance of the skin. They may use lasers, light therapy, chemical peels, microdermabrasion, or many other forms of skin treatment.

Acne occurs when hair follicles become clogged with oil and dead skin cells, most commonly on the face or back. The clogged follicles can then become infected and inflamed. Treatments include antibiotics, anti-inflammatories, and retinoid creams.

Eczema is dry, sensitive skin that causes an itchy red rash, often in response to specific triggers. It is common in childhood but can sometimes last into adulthood. The main treatment involves keeping skin well moisturized.

Dermatitis is the medical name for any kind of skin inflammation or rash. Rashes can happen because of an allergy or contact with an irritating substance. They may be red, itchy, or even painful. They are often treated with antihistamines or moisturizing creams containing cortisone.

Psoriasis is patches of thick, red skin that is covered in silvery scales. It is often itchy and sore. Psoriasis is thought to be caused by an immune disorder, and it runs in families. Psoriasis is not contagious. There is no cure, but there are medicated creams available to treat the symptoms.

Skin growths, including warts and moles, are usually not serious. However, some skin growths should be examined by a doctor to make sure they don't cause problems in the future. Warts are harmless, rough, bumpy growths caused by a viral infection. They occur most often on the hands and feet. Because they are caused by a virus, they are contagious. Moles are brown or black spots that are sometimes raised slightly from the surface of the skin. They happen when clumps of pigment cells form in a cluster instead of spread out. Moles are harmless except that they are more vulnerable to cancer than other parts of the skin. Skin cancer is the most common form of cancer in the United States, and its risk increases with sun exposure and fair skin tone.

Skin issues can be embarrassing or irritating, but most are minor and can be treated without serious problems. Some, however, can be a sign of a more significant issue, so it is important to see a doctor for anything out of the ordinary.

Noteworthy Medicare Patient Procedures Performed by Dr. Timothy W. Chang, MD in 2023

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

Top 10%

By Volume:

removal of skin lesion

In 2023, Dr. Timothy W. Chang, MD performed more removal of skin lesion (growth or mark) procedures for Medicare patients than 90% of providers in related specialties within California.

Top 25%

By Volume:

Mohs surgery

reconstructive plastic surgery

tissue transfer

wound repair

By Affordability:

intralesional injection

Mohs surgery

removal of benign skin lesion

skin cancer removal

skin cancer surgery

skin incision and drainage

skin lesion destruction

In 2013, among providers in related specialties within California, Dr. Timothy W. Chang, MD performed more Mohs surgery, reconstructive plastic surgery, tissue transfer, and wound repair (e.g. stitches) procedures for Medicare patients than 75% of them and he also had a list price for intralesional injection, Mohs surgery, removal of benign (non-cancerous) skin lesion, skin cancer removal, skin cancer surgery, skin incision and drainage, and skin lesion destruction (e.g. laser surgery) 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

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

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

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2014 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

diagnostic procedures	51
doctor visit	214
removal of lesion (e.g. growth)	145
skin procedures	145

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	131
Female	88

**Ethnicity**
Non-Hispanic White	208
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	96
85 and over	25
Less than 65	17

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2014

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2014 were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	42
High Cholesterol	38
Stroke	0
Ischemic Heart Disease	36
Depression	17
Chronic Kidney Disease	15
Asthma	6
Osteoperosis	5
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	6
Diabetes	21
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2015 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

diagnostic procedures	110
doctor visit	295
removal of lesion (e.g. growth)	279
skin procedures	279

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	478
Female	344

**Ethnicity**
Non-Hispanic White	796
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	346
From 75 to 84	342
85 and over	70
Less than 65	64

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2015

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

Hypertension	53
High Cholesterol	42
Stroke	4
Ischemic Heart Disease	34
Depression	13
Chronic Kidney Disease	18
Asthma	6
Osteoperosis	6
Atrial Fibrilation	9
Heart Failure	8
Chronic Obstructive Pulmonary Disease	7
Diabetes	21
Dementia	4
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2016 were removal of lesion (e.g. growth), skin procedures and diagnostic procedures.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

diagnostic procedures	44
doctor visit	183
removal of lesion (e.g. growth)	88
skin procedures	88

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	107
Female	72

**Age**
From 65 to 74	74
From 75 to 84	60
85 and over	27
Less than 65	18

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2016

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2016 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	51
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	40
Depression	16
Chronic Kidney Disease	24
Asthma	8
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	8
Diabetes	20
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2017 were removal of lesion (e.g. growth), skin procedures, diagnostic procedures and skin surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

cancer surgery	106
diagnostic procedures	208
doctor visit	497
ear procedures	12
injections	16
removal of lesion (e.g. growth)	405
skin procedures	405
skin surgery	106

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	173
Female	189

**Ethnicity**
Non-Hispanic White	349
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	148
From 75 to 84	138
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2017

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2017 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	51
High Cholesterol	41
Stroke	4
Ischemic Heart Disease	28
Depression	13
Chronic Kidney Disease	18
Asthma	4
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	16
Dementia	6
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2018 were removal of lesion (e.g. growth), skin procedures, diagnostic procedures and skin surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

cancer surgery	296
diagnostic procedures	446
doctor visit	1284
ear procedures	21
injections	33
minor procedures	22
plastic surgery procedures	37
reconstructive surgery	37
removal of lesion (e.g. growth)	1240
skin procedures	1240
skin surgery	296
tissue transfer	37
wound repair (e.g. stitches)	59

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	269
Female	311

**Ethnicity**
Non-Hispanic White	546
Black	0
Hispanic	0
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	242
From 75 to 84	228
85 and over	98
Less than 65	12

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2018

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2018 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	50
High Cholesterol	49
Stroke	3
Ischemic Heart Disease	26
Depression	14
Chronic Kidney Disease	15
Asthma	4
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	12
Chronic Obstructive Pulmonary Disease	7
Diabetes	13
Dementia	5
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2019 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

cancer surgery	63
doctor visit	245
removal of lesion (e.g. growth)	284
skin procedures	284
skin surgery	63

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	107
Female	96

**Age**
From 65 to 74	72
From 75 to 84	83
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2019

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2019 were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	52
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	30
Depression	12
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	5
Atrial Fibrilation	14
Heart Failure	17
Chronic Obstructive Pulmonary Disease	10
Diabetes	19
Dementia	7
Cancer	14

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2020 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

cancer surgery	384
doctor visit	461
injections	17
plastic surgery procedures	78
reconstructive surgery	78
removal of lesion (e.g. growth)	822
skin procedures	822
skin surgery	384
tissue transfer	78
wound repair (e.g. stitches)	78

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	179
Female	162

**Ethnicity**
Non-Hispanic White	319
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	126
From 75 to 84	147
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2020

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2020 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	50
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	36
Depression	13
Chronic Kidney Disease	23
Asthma	4
Osteoperosis	8
Atrial Fibrilation	19
Heart Failure	17
Chronic Obstructive Pulmonary Disease	9
Diabetes	18
Dementia	7
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2021 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

abscess drainage	12
cancer surgery	528
doctor visit	820
incision and drainage	12
injections	29
minor procedures	12
plastic surgery procedures	111
reconstructive surgery	111
removal of lesion (e.g. growth)	1335
skin procedures	1335
skin surgery	540
tissue transfer	111
wound repair (e.g. stitches)	111

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	252
Female	212

**Ethnicity**
Non-Hispanic White	418
Black	0
Hispanic	0
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	159
From 75 to 84	212
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2021

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2021 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	54
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	38
Depression	15
Chronic Kidney Disease	22
Asthma	3
Osteoperosis	13
Atrial Fibrilation	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	8
Diabetes	15
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2022 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

cancer surgery	585
doctor visit	1085
injections	19
minor procedures	12
plastic surgery procedures	112
reconstructive surgery	112
removal of lesion (e.g. growth)	1529
skin procedures	1529
skin surgery	585
tissue transfer	112
wound repair (e.g. stitches)	124

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	280
Female	246

**Ethnicity**
Non-Hispanic White	485
Black	0
Hispanic	0
Asian	0
Other	21
Native American	0

**Age**
From 65 to 74	199
From 75 to 84	234
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2022

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2022 were high cholesterol, hypertension, ischemic heart disease and atrial fibrilation.

Hypertension	61
High Cholesterol	70
Stroke	6
Ischemic Heart Disease	29
Depression	13
Chronic Kidney Disease	16
Asthma	6
Osteoperosis	16
Atrial Fibrilation	20
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	14
Dementia	4
Cancer	19

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA during 2023 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

abscess drainage	11
cancer surgery	613
doctor visit	1027
incision and drainage	11
injections	13
minor procedures	11
plastic surgery procedures	114
reconstructive surgery	114
removal of lesion (e.g. growth)	1551
skin procedures	1551
skin surgery	624
tissue transfer	114
wound repair (e.g. stitches)	114

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	309
Female	275

**Ethnicity**
Non-Hispanic White	540
Black	0
Hispanic	0
Asian	0
Other	22
Native American	0

**Age**
From 65 to 74	201
From 75 to 84	262
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD in 2023

The most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated during 2023 were high cholesterol, hypertension, ischemic heart disease and atrial fibrilation.

Hypertension	61
High Cholesterol	73
Stroke	7
Ischemic Heart Disease	27
Depression	14
Chronic Kidney Disease	17
Asthma	5
Osteoperosis	17
Atrial Fibrilation	20
Heart Failure	13
Chronic Obstructive Pulmonary Disease	11
Diabetes	14
Dementia	5
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Timothy W. Chang, MD for Medicare patients.

The highest averages for the top procedures that Dr. Timothy W. Chang, MD treated as a mohs skin cancer surgeon in La Jolla, CA were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

abscess drainage	11
cancer surgery	367
diagnostic procedures	171
doctor visit	611
ear procedures	16
incision and drainage	11
injections	21
minor procedures	14
plastic surgery procedures	90
reconstructive surgery	90
removal of lesion (e.g. growth)	767
skin procedures	767
skin surgery	371
tissue transfer	90
wound repair (e.g. stitches)	97

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Timothy W. Chang, MD.

**Gender**
Male	207
Female	181

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	334
Native American / Alaskan Native	0
Hispanic	0
Other	7

**Age**
75 to 84	163
85 and over	20
Less than 65	10
65 to 74	149

Average of Total of Conditions of Medicare patients treated by Dr. Timothy W. Chang, MD From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Timothy W. Chang, MD treated were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	47
High Cholesterol	47
Stroke	2
Ischemic Heart Disease	29
Depression	12
Chronic Kidney Disease	16
Asthma	4
Osteoporosis	8
Heart Failure	12
Chronic Obstructive Pulmonary Disease	7
Diabetes	15
Atrial Fibrillation	13
Cancer	12
Dementia	4

Education & Training

Dr. Timothy W. Chang, MD graduated from Medical College of Wisconsin in 2012. He completed residency at Mayo Clinic. He is certified by the American Board of Dermatology and has a state license in California.

Medical School: Medical College of Wisconsin (2012)

Residency: Mayo Clinic (2016)

Board Certification: American Board of Dermatology (2016)

Licensed In: California

Affiliations & Hospitals

Dr. Timothy W. Chang, MD is associated with these hospitals and organizations:

Scripps Memorial Hospital La Jolla

Scripps Health

COASTAL MEDICAL AND COSMETIC DERMATOLOGY INC

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General Payments

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

**Payments by Company**
Pfizer Inc.	$1,078 EUCRISA $414	CIBINQO $384	LITFULO $280
Janssen Biotech, Inc.	$874 Tremfya $796	SIMPONI $29	SIMPONI ARIA $26	STELARA $23
AbbVie Inc.	$802 Skyrizi $469	Rinvoq $194	Humira $112	$27
Regeneron Healthcare Solutions, Inc.	$748 DUPIXENT $530	DUPIXENT DUPILUMAB INJECTION $123	LIBTAYO $95
LEO Pharma Inc.	$701 ENSTILAR $443	ADBRY $254	$4
Other	$4,479 DUPIXENT $459	TALTZ $420	Sotyktu $325	OPZELURA $295	Otezla $275	Other $2,705

**Types of Payments**
Food and Beverage	$8,313
Education	$369

Biography

Dr. Timothy Chang's area of specialization is MOHS-micrographic surgery. Dr. Chang's education and training includes medical school at Medical College of Wisconsin and residency at Mayo Clinic. He is conversant in Spanish. He is professionally affiliated with Scripps Memorial Hospital La Jolla. He has an open panel in La Jolla, CA according to Scripps Health.