Mark Kubik, MD
Geriatric Medicine (Internal Medicine) Physician · Greenbrae, CA
Mark Kubik, MD is a geriatric medicine (internal medicine) physician with a practice address in Greenbrae, California, and NPI 1174746325, issued on Apr 10, 2007. Check the license (California G35704, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Kubik
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- G35704 CA
Self-reported in NPPES; status is on the state search - Practice location
- 501 Via Casitas, Greenbrae, CA 94904
- Phone
- (415) 464-1770
- Enumerated
- Apr 10, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 464-1158
- Medicare enrollment
- Enrolled (PECOS I20110624000598); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 501 Via Casitas
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Theresa Berta, MDGeriatric Medicine (Internal Medicine) Physician1316087612
- Mona ChatterjiSpeech-Language Pathologist1053162164
- Samantha Fargeon, LCSWClinical Social Worker1770791931
- Joshua ManioOccupational Therapist1538932926
- Brooke Merino, DPTPhysical Therapist1003455759
- John Toups, OTROccupational Therapist1962248856
Verify Mark Kubik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G35704Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
576 Medicare Part D claims for 66 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 15 claims were for opioids.
Most prescribed
- Levothyroxine Sodium58 claims
- Amlodipine Besylate55 claims
- Eliquis28 claims
- Losartan Potassium26 claims
- Atorvastatin Calcium23 claims
- Metoprolol Succinate20 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.
Mark Kubik among 532 geriatric medicine (internal medicine) physician records in California
Mark Kubik, MD is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 54% of them.
- NPI issued2007 · 54% of these records are older, 34% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated1976 · median 1999 among the 271 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in Greenbrae → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Theresa Berta, MDGreenbrae, CA 949041316087612
- Maryam Ziaie Matin, MDGreenbrae, CA 949041124133111
- Jessica Neil, MDSan Rafael, CA 949031831518570
- Mark Sockell, MDPoint Reyers, CA 949561194810952
- Bindu Chopra, M.D.Cupertino, CA 950141972587426
- Alice Lively Hamill, DOCupertino, CA 950141336228469
- Linda Lu, M.D.Los Gatos, CA 950321659546596
- Myo Aung, MDSanta Clara, CA 950511588741441
Common questions
What is Mark Kubik, MD's NPI number?
Mark Kubik, MD's National Provider Identifier (NPI) is 1174746325, issued on Apr 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Kubik, MD located?
The NPPES record lists a practice address at 501 Via Casitas, Greenbrae, CA, 94904. Phone: (415) 464-1770. Providers update this record themselves, so call before visiting.
How can I verify Mark Kubik, MD's license?
NPPES lists California license number G35704, 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 Kubik, MD prescribe under Medicare Part D?
In 2024, Mark Kubik, MD had 576 Medicare Part D claims for 66 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.