Ruth Rubin, M.D.
Internal Medicine Physician · Corte Madera, CA
Ruth Rubin, M.D. is an internal medicine physician with a practice address in Corte Madera, California, and NPI 1043238041, issued on Jul 17, 2006. Check the license (California G55162, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ruth Rubin
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G55162 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21 Tamal Vista Blvd, Corte Madera, CA 94925
- Phone
- (415) 927-0101
- Enumerated
- Jul 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 927-5310
- Medicare enrollment
- Enrolled (PECOS I20040617001087); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 21 Tamal Vista Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Allen, M.F.T.Marriage & Family Therapist1629320999
- Pamela Ashkenazy, LMFT, PH.D.Professional Counselor1124572755
- Carl Baum, MDDevelopmental - Behavioral Pediatrics Physician1811178320
- Stefan Benton, MFTMarriage & Family Therapist1063645364
- Jennifer Cappelletti, LMFT 146548Marriage & Family Therapist1114456241
- Tancredi Damore, MDPlastic and Reconstructive Surgery Physician1619958907
Verify Ruth Rubin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G55162Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,493 Medicare Part D claims for 189 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 41 claims were for opioids.
Most prescribed
- Atorvastatin Calcium214 claims
- Levothyroxine Sodium168 claims
- Rosuvastatin Calcium130 claims
- Losartan Potassium118 claims
- Amlodipine Besylate102 claims
- Escitalopram Oxalate65 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.
Ruth Rubin among 17,696 internal medicine physician records in California
Ruth Rubin, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Corte Madera
They are 4 of the 365 NPPES records with a practice address in Corte Madera, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Corte Madera → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sajot Grewal, M.D.Corte Madera, CA 949251144230053
- William McAllister, M.D.Corte Madera, CA 949251821072646
- Alfred Oppenheim, M.D.Corte Madera, CA 949251023028917
- Nana Barnes, MDRohnert Park, CA 949281063900520
- Michael Bunce, MDRohnert Park, CA 949281740369875
- Sara Ganeless Levine, MDRohnert Park, CA 949281326122490
- Steven Gelber, M.D.Rohnert Park, CA 949281144495326
- Paul Johnson, MDRohnert Park, CA 949281881778876
Common questions
What is Ruth Rubin, M.D.'s NPI number?
Ruth Rubin, M.D.'s National Provider Identifier (NPI) is 1043238041, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruth Rubin, M.D. located?
The NPPES record lists a practice address at 21 Tamal Vista Blvd, Corte Madera, CA, 94925. Phone: (415) 927-0101. Providers update this record themselves, so call before visiting.
How can I verify Ruth Rubin, M.D.'s license?
NPPES lists California license number G55162, 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 Ruth Rubin, M.D. prescribe under Medicare Part D?
In 2024, Ruth Rubin, M.D. had 2,493 Medicare Part D claims for 189 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.