Sara Mathew Holmes, MD
Nephrology Physician · Novato, CA
Sara Mathew Holmes, MD is a nephrology physician with a practice address in Novato, California, and NPI 1801174479, issued on Jul 29, 2011. Check the license (California A133361, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sara Mathew Holmes
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- A133361 CA
MD600004898 DC
MD443610 PA
Self-reported in NPPES; status is on the state search - Practice location
- 97 San Marin Dr, Novato, CA 94945
- Phone
- (415) 899-7880
- Enumerated
- Jul 29, 2011
- Record last updated
- Nov 5, 2025
- Fax
- (415) 899-7815
- Medicare enrollment
- Enrolled (PECOS I20260413001091); may accept Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 97 San Marin Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ellen Biera, RCT, RRT, RCPRegistered Respiratory Therapist1639950991
- Jane Burr, RNDiabetes Educator Registered Nurse1932246220
Verify Sara Mathew Holmes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A133361Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average nephrology physician in 2024
1,490 Medicare Part D claims for 255 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium125 claims
- Torsemide88 claims
- Amlodipine Besylate75 claims
- Jardiance71 claims
- Lisinopril56 claims
- Calcitriol55 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.
Sara Mathew Holmes among 1,468 nephrology physician records in California
Sara Mathew Holmes, MD is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 76% of them.
- NPI issued2011 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2006 · median 2001 among the 1,128 with a school on file
- Record last updated2025 · 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 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Novato → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Farid Osman, MDPetaluma, CA 949541962423103
- Ann O'Hare, MDCorte Madera, CA 949251033294020
- Genevieve Estilo, MDGreenbrae, CA 949041558560482
- Warda Zaman, D.O.Greenbrae, CA 949041336534585
- Henry Hulter, M.D.San Rafael, CA 949031104139633
- Eric Tepper, MDSan Rafael, CA 949031790869774
- Ronald Albright, M.D.Freedom, CA 950191093839011
- Mohammad Al Hasan, MDHollister, CA 950231932183829
Common questions
What is Sara Mathew Holmes, MD's NPI number?
Sara Mathew Holmes, MD's National Provider Identifier (NPI) is 1801174479, issued on Jul 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Sara Mathew Holmes, MD located?
The NPPES record lists a practice address at 97 San Marin Dr, Novato, CA, 94945. Phone: (415) 899-7880. Providers update this record themselves, so call before visiting.
How can I verify Sara Mathew Holmes, MD's license?
NPPES lists California license number A133361, 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 Sara Mathew Holmes, MD prescribe under Medicare Part D?
In 2024, Sara Mathew Holmes, MD had 1,490 Medicare Part D claims for 255 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.