Mark Harold Kogan, M.D.
Gastroenterology Internal Medicine
Also practices: INTERNAL MEDICINE
With over 46 years in internal medicine, Mark Harold Kogan, M.D. is a long-established gastroenterologist in San Pablo. Trained at Northwestern University Feinberg Medical School (class of 1980), he has been practicing for over 46 years. Among his Medicare patients, common conditions include hypertension, high cholesterol, and diabetes (per CMS data).
Older · 421dNPPES updated 2025-03-11 · verify on CMS
Contact & Location
Practice Location
2089 Vale Rd Suite 33, San Pablo, CA 94806-3847
How Does This Doctor Compare?
Generic Rx
↑ Higher = better72.8%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-10 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
378
Unique beneficiaries
Standard volumePrescription Recipients
314
Patients prescribed
Prescriptions Written
837
Total claims
Total Medicare drug cost: $287k
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Diabetes.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+3%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+5%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-10%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-3%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-10%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-11%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$638 received from industry
19 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Mark Harold Kogan's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1980
Northwestern University Feinberg School of Medicine
Board certified · Mar 10, 2025
CMS-verified certification date
46 years in practice
Senior practitioner
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Education & Training
Northwestern University Feinberg Medical School (Class of 1980)
Primary hospital affiliation: Long-term
CMS Certification Number: 192008
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Mark Harold Kogan
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mark Harold Kogan for blood pressure monitoring, cholesterol management, diabetes check-ins — no travel to San Pablo required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Mark Harold Kogan
Dr. Kogan is listed as active in the NPI registry with telehealth listed in San Pablo, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (510) 234-5012.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Mark Harold Kogan
Practice Location
2089 Vale Rd Suite 33, San Pablo, CA 94806-3847
Mailing Address
2089 Vale Rd Suite 33, San Pablo, CA 94806-3847
This is a provider directory. Contact the office directly to schedule appointments.
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