Mark Harold Kogan, M.D.
Gastroenterology Physician · San Pablo, CA
Mark Harold Kogan, M.D. is a gastroenterology physician with a practice address in San Pablo, California, and NPI 1780690313, issued on Aug 1, 2006. Check the license (California G60809, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Harold Kogan
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G60809 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2089 Vale RD, San Pablo, CA 94806
- Phone
- (510) 234-5012
- Enumerated
- Aug 1, 2006
- Record last updated
- Mar 11, 2025
- Fax
- (510) 234-4921
- Medicare enrollment
- Enrolled (PECOS I20040910000738); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 2089 Vale RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Harold Kogan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G60809Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average gastroenterology physician in 2024
898 Medicare Part D claims for 316 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Omeprazole204 claims
- Pantoprazole Sodium115 claims
- Dicyclomine Hcl64 claims
- Sutab62 claims
- Famotidine44 claims
- Gavilyte-C44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $637.52
19 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
3 hospitals and group practices
- Genesis Healthcare Partners PCSan Pablo, CA
- Ridgecrest Regional HospitalRidgecrest, CA · Critical Access Hospitals
- Sutter Bay Medical FoundationBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Mark Harold Kogan among 2,140 gastroenterology physician records in California
Mark Harold Kogan, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1980 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in San Pablo → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Kiran Narsinh, M.D.San Pablo, CA 948061730316977
- Jacqueline Park, M.D.San Pablo, CA 948061346415247
- Gerald Schaffer, MDSan Pablo, CA 948061780797027
- Nels Thygeson, M.D.San Rafael, CA 949011114189495
- Jeffrey Fox, MDSan Rafael, CA 949031972687945
- Robert Myers, MDSan Rafael, CA 949031548344518
- Sheba Vohra, M.D.San Rafael, CA 949031285957670
- John Bettinger, M.D.Greenbrae, CA 949041225037500
Common questions
What is Mark Harold Kogan, M.D.'s NPI number?
Mark Harold Kogan, M.D.'s National Provider Identifier (NPI) is 1780690313, issued on Aug 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Harold Kogan, M.D. located?
The NPPES record lists a practice address at 2089 Vale RD, San Pablo, CA, 94806. Phone: (510) 234-5012. Providers update this record themselves, so call before visiting.
How can I verify Mark Harold Kogan, M.D.'s license?
NPPES lists California license number G60809, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Harold Kogan, M.D. prescribe under Medicare Part D?
In 2024, Mark Harold Kogan, M.D. had 898 Medicare Part D claims for 316 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.