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Home > CA Providers > Dermatologists

Dr. Mark Andrew Willoughby, MD

Accepting New Patients

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Specializes in: Dermatology (Skin Disorders)

Ohio State University College of Medicine

6475 Alvarado Road #222
San Diego, CA 92120

(619) 287-2877

Dr. Mark Andrew Willoughby, MD is a dermatologist in Chula Vista, CA specializing in dermatology (skin disorders). He graduated from Ohio State University College of Medicine. Dr. Mark Andrew Willoughby, MD is affiliated with Sharp HealthCare, Scripps Mercy Hospital Chula Vista, Scripps Health and Scripps Mercy Hospital San Diego.

Office Locations

Scripps Mercy Hospital San Diego

319 F Street #102
Chula Vista, CA 91910

(619) 476-1200

open_in_new

Sharp HealthCare

344 F Street Suite 200
Chula Vista, CA 91910

(619) 229-0361

(619) 287-2121

open_in_new

Scripps Mercy Hospital San Diego

4060 Fourth Avenue Suite 209
San Diego, CA 92103

(619) 298-9535

open_in_new

6386 Alvarado Court Suite 205
San Diego, CA 92120

open_in_new

Scripps Mercy Hospital San Diego

6475 Alvarado Road #222
San Diego, CA 92120

(619) 287-2877

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Mark Andrew Willoughby, MD in 2023

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

Top 5%

By Volume:

intralesional injection

By Affordability:

Goeckerman therapy

phototherapy

removal of benign skin lesion

removal of skin lesion

skin lesion destruction

skin procedures

ultraviolet B phototherapy

UVB therapy with emollient

In 2023, among providers in related specialties within California, Dr. Mark Andrew Willoughby, MD performed more intralesional injection procedures for Medicare patients than 95% of them and he also had a list price for Goeckerman therapy (coal tar with UVB phototherapy), phototherapy (light therapy), removal of benign (non-cancerous) skin lesion, removal of skin lesion (growth or mark), skin lesion destruction (e.g. laser surgery), skin procedures, ultraviolet B (UVB) phototherapy, and UVB therapy with emollient (e.g. mineral oil) 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 Affordability:

ultraviolet light therapy

In 2023, Dr. Mark Andrew Willoughby, MD had a list price for ultraviolet (UV) light therapy that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Affordability:

intralesional injection

In 2012, Dr. Mark Andrew Willoughby, MD had a list price for intralesional injection 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. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2012 were diagnostic procedures, removal of lesion (e.g. growth), skin procedures and injections.

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	568
doctor visit	1801
injections	120
removal of lesion (e.g. growth)	289
skin procedures	289

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2013 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	605
doctor visit	1834
injections	87
phototherapy (light therapy)	165
removal of lesion (e.g. growth)	266
skin procedures	292

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	641
Female	544

**Ethnicity**
Non-Hispanic White	968
Black	0
Hispanic	118
Asian	45
Other	27
Native American	0

**Age**
From 65 to 74	451
From 75 to 84	386
85 and over	248
Less than 65	100

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2013

Hypertension	63
High Cholesterol	54
Stroke	5
Ischemic Heart Disease	35
Depression	18
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	25
Chronic Obstructive Pulmonary Disease	14
Diabetes	35
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2014 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	606
doctor visit	1771
injections	96
phototherapy (light therapy)	225
removal of lesion (e.g. growth)	279
skin procedures	324

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	689
Female	570

**Ethnicity**
Non-Hispanic White	1037
Black	0
Hispanic	110
Asian	49
Other	40
Native American	0

**Age**
From 65 to 74	439
From 75 to 84	438
85 and over	271
Less than 65	111

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2014

Hypertension	59
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	33
Depression	20
Chronic Kidney Disease	22
Asthma	6
Osteoperosis	8
Atrial Fibrilation	11
Heart Failure	25
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	13
Cancer	9

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2015 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	523
doctor visit	1629
injections	49
phototherapy (light therapy)	150
removal of lesion (e.g. growth)	272
skin procedures	327

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	1226
Female	1022

**Ethnicity**
Non-Hispanic White	1844
Black	0
Hispanic	192
Asian	92
Other	62
Native American	0

**Age**
From 65 to 74	882
From 75 to 84	720
85 and over	476
Less than 65	170

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2015

Hypertension	58
High Cholesterol	52
Stroke	4
Ischemic Heart Disease	30
Depression	20
Chronic Kidney Disease	23
Asthma	10
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	13
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2016 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	485
doctor visit	1522
injections	47
laser treatment	87
phototherapy (light therapy)	232
removal of lesion (e.g. growth)	266
skin procedures	401

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	607
Female	515

**Ethnicity**
Non-Hispanic White	900
Black	0
Hispanic	106
Asian	44
Other	37
Native American	0

**Age**
From 65 to 74	461
From 75 to 84	348
85 and over	229
Less than 65	84

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2016

Hypertension	58
High Cholesterol	47
Stroke	5
Ischemic Heart Disease	31
Depression	21
Chronic Kidney Disease	23
Asthma	16
Osteoperosis	8
Atrial Fibrilation	10
Heart Failure	23
Chronic Obstructive Pulmonary Disease	13
Diabetes	31
Dementia	13
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2017 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	480
doctor visit	1744
injections	116
minor procedures	15
phototherapy (light therapy)	158
removal of lesion (e.g. growth)	311
skin procedures	341
wound repair (e.g. stitches)	15

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	640
Female	521

**Ethnicity**
Non-Hispanic White	925
Black	0
Hispanic	101
Asian	58
Other	47
Native American	0

**Age**
From 65 to 74	512
From 75 to 84	357
85 and over	204
Less than 65	88

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2017

Hypertension	57
High Cholesterol	43
Stroke	4
Ischemic Heart Disease	30
Depression	19
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	9
Atrial Fibrilation	12
Heart Failure	22
Chronic Obstructive Pulmonary Disease	13
Diabetes	30
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2018 were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	541
doctor visit	1841
injections	88
laser treatment	116
phototherapy (light therapy)	228
removal of lesion (e.g. growth)	287
skin procedures	403

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	667
Female	554

**Ethnicity**
Non-Hispanic White	962
Black	0
Hispanic	97
Asian	75
Other	53
Native American	0

**Age**
From 65 to 74	522
From 75 to 84	434
85 and over	181
Less than 65	84

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2018

Hypertension	58
High Cholesterol	47
Stroke	4
Ischemic Heart Disease	28
Depression	17
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	7
Atrial Fibrilation	12
Heart Failure	20
Chronic Obstructive Pulmonary Disease	11
Diabetes	28
Dementia	10
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2019 were skin procedures, removal of lesion (e.g. growth), phototherapy (light therapy) and laser treatment.

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

doctor visit	1694
injections	93
laser treatment	113
phototherapy (light therapy)	229
removal of lesion (e.g. growth)	347
skin procedures	460

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	639
Female	499

**Ethnicity**
Non-Hispanic White	875
Black	0
Hispanic	115
Asian	54
Other	52
Native American	0

**Age**
From 65 to 74	479
From 75 to 84	398
85 and over	185
Less than 65	76

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2019

Hypertension	56
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	29
Depression	20
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	21
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2020 were removal of lesion (e.g. growth), skin procedures, phototherapy (light therapy) and injections.

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

doctor visit	1503
injections	68
phototherapy (light therapy)	133
removal of lesion (e.g. growth)	261
skin procedures	261

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	565
Female	421

**Ethnicity**
Non-Hispanic White	758
Black	0
Hispanic	102
Asian	52
Other	53
Native American	0

**Age**
From 65 to 74	425
From 75 to 84	367
85 and over	140
Less than 65	54

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2020

Hypertension	55
High Cholesterol	48
Stroke	4
Ischemic Heart Disease	29
Depression	18
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	18
Chronic Obstructive Pulmonary Disease	12
Diabetes	28
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2021 were skin procedures, phototherapy (light therapy), removal of lesion (e.g. growth) and laser treatment.

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

doctor visit	1848
injections	89
laser treatment	219
phototherapy (light therapy)	357
removal of lesion (e.g. growth)	337
skin procedures	556

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	682
Female	547

**Ethnicity**
Non-Hispanic White	913
Black	0
Hispanic	118
Asian	83
Other	70
Native American	0

**Age**
From 65 to 74	536
From 75 to 84	453
85 and over	171
Less than 65	69

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2021

Hypertension	55
High Cholesterol	48
Stroke	4
Ischemic Heart Disease	27
Depression	19
Chronic Kidney Disease	24
Asthma	5
Osteoperosis	7
Atrial Fibrilation	11
Heart Failure	17
Chronic Obstructive Pulmonary Disease	10
Diabetes	28
Dementia	8
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA during 2022 were removal of lesion (e.g. growth), skin procedures, phototherapy (light therapy) and injections.

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

diagnostic procedures	16
doctor visit	2148
eye procedures	16
injections	142
phototherapy (light therapy)	205
removal of lesion (e.g. growth)	455
skin procedures	455

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	808
Female	633

**Ethnicity**
Non-Hispanic White	1098
Black	0
Hispanic	133
Asian	79
Other	82
Native American	0

**Age**
From 65 to 74	576
From 75 to 84	569
85 and over	235
Less than 65	61

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2022

Hypertension	66
High Cholesterol	63
Stroke	6
Ischemic Heart Disease	21
Depression	17
Chronic Kidney Disease	17
Asthma	8
Osteoperosis	12
Atrial Fibrilation	19
Heart Failure	14
Chronic Obstructive Pulmonary Disease	14
Diabetes	27
Dementia	5
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark Andrew Willoughby, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark Andrew Willoughby, MD treated as a dermatologist in Chula Vista, CA were diagnostic procedures, skin procedures, removal of lesion (e.g. growth) and phototherapy (light therapy).

diagnostic procedures	478
doctor visit	1757
eye procedures	16
injections	90
laser treatment	133
minor procedures	15
phototherapy (light therapy)	208
removal of lesion (e.g. growth)	306
skin procedures	373
wound repair (e.g. stitches)	15

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark Andrew Willoughby, MD.

**Gender**
Male	651
Female	529

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	57
Non-Hispanic White	934
Native American / Alaskan Native	0
Hispanic	108
Other	47

**Age**
75 to 84	406
85 and over	212
Less than 65	81
65 to 74	480

Average of Total of Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD From 2012 - 2022

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

Hypertension	53
High Cholesterol	46
Stroke	4
Ischemic Heart Disease	26
Depression	17
Chronic Kidney Disease	20
Asthma	7
Osteoporosis	7
Heart Failure	18
Chronic Obstructive Pulmonary Disease	11
Diabetes	27
Atrial Fibrillation	10
Dementia	9
Cancer	9

Education & Training

Dr. Mark Andrew Willoughby, MD graduated from Ohio State University College of Medicine. He completed residency at John Stroger Hospital of Cook County. He is certified by the Dermatology and has a state license in California.

Medical School: Ohio State University College of Medicine

Residency: John Stroger Hospital of Cook County

Board Certification: Dermatology

Licensed In: California

Affiliations & Hospitals

Dr. Mark Andrew Willoughby, MD is associated with these hospitals and organizations:

Sharp HealthCare

Scripps Mercy Hospital Chula Vista

Scripps Health

Scripps Mercy Hospital San Diego

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. Mark Andrew Willoughby, MD appears to accept the following insurance providers: Cigna, Health Net, Aetna, UnitedHealthcare, Sharp Health Plan, Anthem, Blue Shield of California and Medicare.

Insurance Accepted by Provider includes:

According to our sources, Dr. Mark Andrew Willoughby, MD accepts the following insurance providers:

Cigna

Health Net

Aetna

UnitedHealthcare

Sharp Health Plan

Anthem

Blue Shield of California

Medicare

Ratings & Reviews

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General Payments

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

**Payments by Company**
iCAD, Inc	$35,500 AXXENT SURFACE CONTROLLER $35,500
Aqua Pharmaceuticals	$888 DERMATOLOGICAL PRODUCTS $196	Cordran $192	Acticlate $170	Fluoroplex $102	VELTIN $48	Other $180
Janssen Biotech, Inc.	$650 Tremfya $372	STELARA $205	SIMPONI $54	SIMPONI ARIA $19
Pfizer Inc.	$482 EUCRISA $356	CIBINQO $81	LITFULO $26	ZAVZPRET $19
Amgen Inc.	$430 Enbrel $374	Otezla $56
Other	$4,195 Humira $470	DUPIXENT $336	TALTZ $334	COSENTYX $299	RETIN-A-MICRO $141	Other $2,615

**Types of Payments**
Consulting Fee	$35,500
Food and Beverage	$6,391
Education	$256

Biography

Dr. Mark Willoughby specializes in dermatology (skin disorders). He can take several insurance carriers, including Blue Shield, Health Net, and Anthem. Dr. Willoughby attended medical school at Ohio State University College of Medicine. His residency was performed at John Stroger Hospital of Cook County. In addition to English, he speaks Spanish. Dr. Willoughby is affiliated with Scripps Mercy Hospital Chula Vista and Sharp HealthCare. He welcomes new patients at his office inSan Diego, CA as reported by Sharp HealthCare.

Select Year:

Dr. Mark Andrew Willoughby, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Mark Andrew Willoughby, MD in 2023

By Volume:

By Affordability:

By Affordability:

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. Mark Andrew Willoughby, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Mark Andrew Willoughby, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Insurance Information

Ratings & Reviews

General Payments

Biography

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