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Dr. Mark Harold Kogan, MD

Accepting New Patients
Specializes in: Adult Gastroenterology
Northwestern University, Feinberg School of Medicine
Professional interests include: anal cancer, gastrointestinal bleeding, autoimmune diseases, and more.
2450 Ashby Avenue
Berkeley, CA 94705

Dr. Mark Harold Kogan, MD is a gastroenterologist in Ridgecrest, CA specializing in adult gastroenterology. He graduated from Northwestern University, Feinberg School of Medicine. Dr. Mark Harold Kogan, MD is affiliated with Alta Bates Summit Medical Center, Sutter Health, Dignity Health, Unio Specialty Care, Brown and Toland Physicians, Hill Physicians, Unio Specialty Care, GENESIS HEALTHCARE PARTNERS PC and RIDGECREST REGIONAL HOSPITAL.

View Doctor's Full Profile (510) 204-4444

Office Locations

Dignity Health

1041 N China Lake Boulevard Suite B
Ridgecrest, CA 93555
(760) 446-8692
(760) 446-6415
open_in_new

Unio Specialty Care

2089 Vale Road Suite 33
San Pablo, CA 94806
(341) 215-2051
1-844-407-0578
open_in_new
2450 Ashby Avenue
Berkeley, CA 94705
(510) 204-4444
open_in_new

Sutter Health

2999 Regent Street Suite 201
Berkeley, CA 94705
(510) 234-5012
open_in_new

Some issues Dr. Mark Harold Kogan, MD can help you with:

Autoimmune Diseases

An autoimmune disorder happens when the immune system mistakenly attacks the tissues of its own body, causing symptoms of illness. There are more than 80 different types of autoimmune disorders. While some are very rare, others are fairly common. Combined, autoimmune disorders are one of the leading causes of death and disability in the United States, affecting approximately 24 million people.

A properly working immune system identifies foreign substances in the body that might cause illness, such as bacteria and viruses. The immune system then creates antibodies which attack the foreign substances, neutralizing them and keeping the body safe. In people with autoimmune disorders, something goes wrong with this process. For reasons that are not fully understand, the immune system creates antibodies to attack the patient's own tissues.

Symptoms of an autoimmune disorder depend on which tissue is being attacked by the immune system, but common symptoms of autoimmune disease include fever, fatigue, and a general feeling of just not being well. Autoimmune disorders are more common in women than in men, and they may run in families. Autoimmune disorders can affect various parts of the body such as blood vessels, connective tissue, endocrine glands, joints, muscles, red blood cells, skin, and many others.

It is common to have more than one autoimmune disorder at a time. Most are chronic, or life-long illnesses, although they may come and go in flares. Treatment for autoimmune disorders depends on which part of the body is being attacked. For example:

  • A type 1 diabetic whose pancreas has been damaged will need insulin.
  • A person with Hashimoto's whose thyroid has been damaged will need replacement thyroid hormones.
  • Someone with Sjogren's syndrome will need eye drops and mouth rinses to replace tears and saliva.

Many autoimmune disorders of all kinds are treated with immune-suppressing medications, such as corticosteroids (e.g. prednisone) to reduce the effect of the immune system.

Hemophilia

Hemophilia is a bleeding disorder in which blood cannot clot normally. After an injury, people who have hemophilia bleed longer because they lack certain blood proteins that are responsible for clotting, called clotting factors. Some hemophiliacs are mildly deficient in this protein, so they bleed only when injured or after surgery. Those who are severely deficient, however, may experience symptoms of spontaneous bleeding, including the following:

  • Presence of blood in stool or urine
  • Frequent nosebleeds or large bruises
  • Unusual bleeding after being vaccinated
  • Pain, swelling, or tightness in joint

Most people with hemophilia have a family history of the disorder, though about 30% do not. The most common forms are hemophilia A (classic hemophilia) and hemophilia B (Christmas disease). Hemophilia A and B share certain characteristics, but different genes are involved. Acquired hemophilia is very rare and has been linked to autoimmune conditions, cancer, and multiple sclerosis.

Hemophilia may be diagnosed using a blood test. If there is family history of the disorder, testing may be done prenatally. Treatment involves regular intravenous replacement of clotting factors, which may be produced in a laboratory (recombinant) or come from blood donors. For people with milder forms of the disease, a hormone called desmopressin may stimulate the body to produce clotting factors. Other drug therapies include medications that help slow the breakdown of blood clots and medications that are applied directly to the wound to promote clotting.

Living with hemophilia can be challenging, but simple things may help prevent excessive bleeding. For example, choosing activities like walking or swimming over contact sports can prevent injuries and strengthen muscles while protecting the joints. Chances for bleeding may also be reduced by making sure that children wear helmets and elbow pads during activities like bicycle rides.

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. Mark Harold Kogan, MD in 2023

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

Top 10%

By Affordability:

chronic care

In 2023, Dr. Mark Harold Kogan, MD had a list price for chronic care 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 Volume:

chronic care

By Affordability:

diagnostic EGD
diagnostic upper endoscopy
EGD with biopsy
EGD with lesion removal
esophagogastroduodenoscopy
therapeutic EGD
therapeutic upper endoscopy
upper endoscopy
upper endoscopy with biopsy
upper endoscopy with lesion removal

In 2012, among providers in related specialties within California, Dr. Mark Harold Kogan, MD performed more chronic care procedures for Medicare patients than 75% of them and he also had a list price for diagnostic EGD, diagnostic upper endoscopy, EGD with biopsy, EGD with lesion removal, esophagogastroduodenoscopy (EGD), therapeutic EGD, therapeutic upper endoscopy, upper endoscopy, upper endoscopy with biopsy, and upper endoscopy with lesion removal 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

2012 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2012 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

anastomosis 14
catheterization 14
diagnostic procedures 106
doctor visit 253
gastrointestinal procedures 182
hospital care 264
inpatient care 264
minimally invasive procedures 182
preventive care 41
removal of lesion (e.g. growth) 106

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2013 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

anastomosis 18
catheterization 18
diagnostic procedures 136
doctor visit 320
gastrointestinal procedures 230
hospital care 252
inpatient care 252
minimally invasive procedures 230
preventive care 46
removal of lesion (e.g. growth) 136

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 149
Female 236
Ethnicity
Non-Hispanic White 159
Black 113
Hispanic 56
Asian 0
Other 0
Native American 0
Age
From 65 to 74 141
From 75 to 84 103
85 and over 68
Less than 65 73

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2013

Hypertension 75
High Cholesterol 59
Stroke 14
Ischemic Heart Disease 35
Depression 27
Chronic Kidney Disease 40
Asthma 11
Osteoperosis 6
Atrial Fibrilation 13
Heart Failure 33
Chronic Obstructive Pulmonary Disease 24
Diabetes 47
Dementia 22
Cancer 11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2014 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 128
doctor visit 316
gastrointestinal procedures 196
hospital care 122
inpatient care 122
minimally invasive procedures 196
preventive care 46
removal of lesion (e.g. growth) 128

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 152
Female 161
Ethnicity
Non-Hispanic White 146
Black 77
Hispanic 44
Asian 0
Other 0
Native American 0
Age
From 65 to 74 129
From 75 to 84 94
85 and over 46
Less than 65 44

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2014

Hypertension 75
High Cholesterol 59
Stroke 10
Ischemic Heart Disease 39
Depression 22
Chronic Kidney Disease 37
Asthma 12
Osteoperosis 5
Atrial Fibrilation 15
Heart Failure 29
Chronic Obstructive Pulmonary Disease 21
Diabetes 45
Dementia 17
Cancer 11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2015 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 188
doctor visit 464
gastrointestinal procedures 221
minimally invasive procedures 221
preventive care 33
removal of lesion (e.g. growth) 188

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 346
Female 392
Ethnicity
Non-Hispanic White 348
Black 184
Hispanic 116
Asian 0
Other 0
Native American 0
Age
From 65 to 74 338
From 75 to 84 212
85 and over 74
Less than 65 114

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2015

Hypertension 70
High Cholesterol 57
Stroke 7
Ischemic Heart Disease 29
Depression 19
Chronic Kidney Disease 32
Asthma 14
Osteoperosis 4
Atrial Fibrilation 12
Heart Failure 16
Chronic Obstructive Pulmonary Disease 12
Diabetes 44
Dementia 9
Cancer 13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2016 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 188
doctor visit 459
gastrointestinal procedures 255
hospital care 102
inpatient care 102
minimally invasive procedures 255
preventive care 67
removal of lesion (e.g. growth) 188

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 180
Female 238
Ethnicity
Non-Hispanic White 200
Black 103
Hispanic 50
Asian 48
Other 17
Native American 0
Age
From 65 to 74 192
From 75 to 84 123
85 and over 41
Less than 65 62

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2016

Hypertension 69
High Cholesterol 53
Stroke 7
Ischemic Heart Disease 24
Depression 20
Chronic Kidney Disease 35
Asthma 19
Osteoperosis 6
Atrial Fibrilation 6
Heart Failure 18
Chronic Obstructive Pulmonary Disease 15
Diabetes 41
Dementia 11
Cancer 14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2017 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 217
doctor visit 469
gastrointestinal procedures 311
hospital care 37
injections 12
inpatient care 37
minimally invasive procedures 311
preventive care 71
removal of lesion (e.g. growth) 217

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 212
Female 211
Ethnicity
Non-Hispanic White 200
Black 101
Hispanic 51
Asian 54
Other 0
Native American 0
Age
From 65 to 74 218
From 75 to 84 116
85 and over 28
Less than 65 61

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2017

Hypertension 74
High Cholesterol 52
Stroke 6
Ischemic Heart Disease 28
Depression 20
Chronic Kidney Disease 36
Asthma 9
Osteoperosis 3
Atrial Fibrilation 9
Heart Failure 17
Chronic Obstructive Pulmonary Disease 14
Diabetes 42
Dementia 9
Cancer 12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2018 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 232
doctor visit 440
gastrointestinal procedures 307
hospital care 98
injections 16
inpatient care 98
liver imaging 14
minimally invasive procedures 307
preventive care 59
removal of lesion (e.g. growth) 232
ultrasound (sonogram) 14

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 201
Female 197
Ethnicity
Non-Hispanic White 196
Black 106
Hispanic 51
Asian 33
Other 12
Native American 0
Age
From 65 to 74 195
From 75 to 84 112
85 and over 24
Less than 65 67

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2018

Hypertension 70
High Cholesterol 57
Stroke 5
Ischemic Heart Disease 26
Depression 21
Chronic Kidney Disease 42
Asthma 8
Osteoperosis 5
Atrial Fibrilation 10
Heart Failure 17
Chronic Obstructive Pulmonary Disease 13
Diabetes 41
Dementia 11
Cancer 14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2019 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 239
doctor visit 509
gastrointestinal procedures 299
hospital care 62
injections 14
inpatient care 62
liver imaging 19
minimally invasive procedures 299
preventive care 46
removal of lesion (e.g. growth) 239
ultrasound (sonogram) 19

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 181
Female 226
Ethnicity
Non-Hispanic White 214
Black 78
Hispanic 55
Asian 40
Other 0
Native American 0
Age
From 65 to 74 212
From 75 to 84 113
85 and over 24
Less than 65 58

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2019

Hypertension 69
High Cholesterol 58
Stroke 5
Ischemic Heart Disease 25
Depression 22
Chronic Kidney Disease 33
Asthma 11
Osteoperosis 6
Atrial Fibrilation 9
Heart Failure 17
Chronic Obstructive Pulmonary Disease 13
Diabetes 37
Dementia 9
Cancer 12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2020 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

diagnostic procedures 175
doctor visit 466
gastrointestinal procedures 188
hospital care 48
inpatient care 48
liver imaging 29
minimally invasive procedures 188
preventive care 13
removal of lesion (e.g. growth) 175
ultrasound (sonogram) 29

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 168
Female 171
Ethnicity
Non-Hispanic White 160
Black 87
Hispanic 33
Asian 42
Other 17
Native American 0
Age
From 65 to 74 167
From 75 to 84 101
85 and over 22
Less than 65 49

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2020

Hypertension 70
High Cholesterol 57
Stroke 3
Ischemic Heart Disease 26
Depression 21
Chronic Kidney Disease 37
Asthma 12
Osteoperosis 6
Atrial Fibrilation 8
Heart Failure 16
Chronic Obstructive Pulmonary Disease 16
Diabetes 35
Dementia 8
Cancer 12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2021 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

chronic care 131
diagnostic procedures 203
doctor visit 487
gastrointestinal procedures 241
hospital care 49
inpatient care 49
liver imaging 22
minimally invasive procedures 252
preventive care 38
removal of lesion (e.g. growth) 203
ultrasound (sonogram) 22

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 184
Female 209
Ethnicity
Non-Hispanic White 169
Black 105
Hispanic 61
Asian 39
Other 0
Native American 0
Age
From 65 to 74 194
From 75 to 84 109
85 and over 28
Less than 65 62

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2021

Hypertension 73
High Cholesterol 59
Stroke 3
Ischemic Heart Disease 30
Depression 26
Chronic Kidney Disease 38
Asthma 11
Osteoperosis 6
Atrial Fibrilation 10
Heart Failure 20
Chronic Obstructive Pulmonary Disease 16
Diabetes 39
Dementia 9
Cancer 15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA during 2022 were chronic care, minimally invasive procedures, gastrointestinal procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

chronic care 388
diagnostic procedures 210
doctor visit 470
gastrointestinal procedures 263
hospital care 55
inpatient care 55
liver imaging 25
minimally invasive procedures 263
preventive care 41
removal of lesion (e.g. growth) 210
ultrasound (sonogram) 25

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 182
Female 225
Ethnicity
Non-Hispanic White 174
Black 103
Hispanic 57
Asian 49
Other 24
Native American 0
Age
From 65 to 74 180
From 75 to 84 134
85 and over 38
Less than 65 55

Conditions of Medicare patients treated by Dr. Mark Harold Kogan, MD in 2022

Hypertension 75
High Cholesterol 74
Stroke 9
Ischemic Heart Disease 23
Depression 22
Chronic Kidney Disease 31
Asthma 12
Osteoperosis 10
Atrial Fibrilation 19
Heart Failure 19
Chronic Obstructive Pulmonary Disease 21
Diabetes 38
Dementia 8
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Mark Harold Kogan, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark Harold Kogan, MD treated as a gastroenterologist in Ridgecrest, CA were chronic care, minimally invasive procedures, gastrointestinal procedures and diagnostic procedures.

anastomosis 16
catheterization 16
chronic care 259
diagnostic procedures 183
doctor visit 423
gastrointestinal procedures 244
hospital care 108
injections 14
inpatient care 108
liver imaging 21
minimally invasive procedures 245
preventive care 45
removal of lesion (e.g. growth) 183
ultrasound (sonogram) 21

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Mark Harold Kogan, MD.

Gender
Male 177
Female 206
Ethnicity
Black / African American 96
Asian / Pacific Islander 27
Non-Hispanic White 178
Hispanic 52
Native American / Alaskan Native 0
Other 6
Age
75 to 84 110
85 and over 35
Less than 65 58
65 to 74 178

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

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

Hypertension 65
High Cholesterol 53
Stroke 6
Ischemic Heart Disease 25
Depression 20
Chronic Kidney Disease 32
Asthma 10
Osteoporosis 5
Heart Failure 18
Chronic Obstructive Pulmonary Disease 15
Diabetes 37
Atrial Fibrillation 10
Cancer 11
Dementia 10

Education & Training

Dr. Mark Harold Kogan, MD graduated from Northwestern University, Feinberg School of Medicine. He completed residency at North Shore University Hospital. He is certified by the Board Certification: Gastroenterology and has a state license in California.

Medical School: Northwestern University, Feinberg School of Medicine

Residency: North Shore University Hospital

Board Certification: Board Certification: Gastroenterology

Licensed In: California

Affiliations & Hospitals

Dr. Mark Harold Kogan, MD is associated with these hospitals and organizations:

Alta Bates Summit Medical Center
Sutter Health
Dignity Health
Unio Specialty Care
Brown and Toland Physicians
Hill Physicians
Unio Specialty Care
GENESIS HEALTHCARE PARTNERS PC
RIDGECREST REGIONAL HOSPITAL

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 Harold Kogan, MD appears to accept the following insurance providers: Cigna, Aetna, Blue Shield of California, Anthem, UnitedHealthcare, Health Net, Humana, Central Health Plan, CCHP Health Plan (Chinese Community Health Plan) and Canopy Health.

Insurance Accepted by Provider includes:

According to our sources, Dr. Mark Harold Kogan, MD accepts the following insurance providers:

Cigna
Aetna
Blue Shield of California
Anthem
UnitedHealthcare
Health Net
Humana
Central Health Plan
CCHP Health Plan (Chinese Community Health Plan)
Canopy Health

Ratings & Reviews

Dr. Mark Harold Kogan, MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 327 ratings. We collect ratings and reviews of Dr. Mark Harold Kogan, MD from all over the web to help you find the right in Ridgecrest, CA. 

4.9
Overall Rating
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General Payments

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

Payments by Company
AbbVie, Inc. $1,284 Humira
$474 		Creon
$140 		Mavyret
$37 		Viekira
$31 		Technivie
$17 		Other
$585
Gilead Sciences Inc $663 Epclusa
$296 		Sovaldi
$118 		Harvoni
$105
$144
AbbVie Inc. $583 Humira
$235 		Creon
$103 		Rinvoq
$99 		Mavyret
$84 		Skyrizi
$46 		Other
$15
Gilead Sciences, Inc. $454 Epclusa
$122
$332
Takeda Pharmaceuticals U.S.A., Inc. $397 ENTYVIO
$365 		MOTEGRITY
$18 		AMITIZA
$14
Other $3,175 XIFAXAN
$315 		STELARA
$303 		LINZESS
$253 		SIMPONI
$186 		DUPIXENT
$176 		Other
$1,942
Types of Payments
Food and Beverage $5,990
Consulting Fee $450
Education $115

Research Payments

Dr. Mark Harold Kogan, MD has received 103 research payments totaling $283,406.

Biography

Dr. Mark Kogan is an adult gastroenterology specialist in San Pablo, CA, Berkeley, CA, and Ridgecrest, CA. He graduated from Northwestern University, Feinberg School of Medicine. For his residency, Dr. Kogan trained at North Shore University Hospital and a hospital affiliated with Weill Cornell Medical College. Areas of expertise for Dr. Kogan include portal hypertension, polypectomy (polyp removal), and feeding tube insertion. Patient ratings for Dr. Kogan average 5.0 stars (out of 5). Dr. Kogan is in-network for several insurance carriers, including Blue Shield, Health Net, and Anthem. His hospital/clinic affiliations include Alta Bates Summit Medical Center, Brown and Toland Physicians, and Dignity Health. Hill Physicians reports that he is accepting new patients at his office in Berkeley, CA.

Other Providers in Ridgecrest, CA