Sarah Stark Lowenthal, M.D.
Family Medicine Physician · Mill Valley, CA
Sarah Stark Lowenthal, M.D. is a family medicine physician with a practice address in Mill Valley, California, and NPI 1790813046, issued on Feb 28, 2007. Check the license (California A80735, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Stark Lowenthal
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A80735 CA
Self-reported in NPPES; status is on the state search - Practice location
- 655 Redwood Hwy Frontage RD Ste 364, Mill Valley, CA 94941
- Phone
- (415) 590-6150
- Enumerated
- Feb 28, 2007
- Record last updated
- Feb 19, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (415) 578-3118
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Sarah Stark Lowenthal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A80735Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
17 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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.
Sarah Stark Lowenthal among 17,133 family medicine physician records in California
Sarah Stark Lowenthal, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 family medicine physician records list a practice address in Mill Valley
They are 15 of the 653 NPPES records with a practice address in Mill Valley, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Mill Valley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Cole, M.D.Mill Valley, CA 949411174919476
- Laravic Flores, M.D.Mill Valley, CA 949411013398973
- Gerald Freedman, M.D.Mill Valley, CA 949411023007069
- Sarah Garayalde, DOMill Valley, CA 949411184932204
- John Garcia, MDMill Valley, CA 949411992140289
- Jerry Gardner, M.DMill Valley, CA 949411396040838
- Zeljko Milovanovic, M.D.Mill Valley, CA 949411548278633
- Barbara Newlon, D.O.Mill Valley, CA 949411356564363
Common questions
What is Sarah Stark Lowenthal, M.D.'s NPI number?
Sarah Stark Lowenthal, M.D.'s National Provider Identifier (NPI) is 1790813046, issued on Feb 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Stark Lowenthal, M.D. located?
The NPPES record lists a practice address at 655 Redwood Hwy Frontage RD Ste 364, Mill Valley, CA, 94941. Phone: (415) 590-6150. Providers update this record themselves, so call before visiting.
How can I verify Sarah Stark Lowenthal, M.D.'s license?
NPPES lists California license number A80735, 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 Sarah Stark Lowenthal, M.D. prescribe under Medicare Part D?
In 2024, Sarah Stark Lowenthal, M.D. had 17 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.