Sandra L. Shefrin, M.D.
Neurology Physician · Mill Valley, CA
Sandra L. Shefrin, M.D. is a neurology physician with a practice address in Mill Valley, California, and NPI 1083665335, issued on May 12, 2006. Check the license (California G51116, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sandra L. Shefrin
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- G51116 CA
Self-reported in NPPES; status is on the state search - Practice location
- 279 Miller Ave, Mill Valley, CA 94941
- Phone
- (415) 380-1950
- Enumerated
- May 12, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (415) 388-5742
- Medicare enrollment
- Enrolled (PECOS I20060628000287); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 279 Miller Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Thomas Brookshire, P.A.Physician Assistant1720282684
- Joshua Pepper, MDFamily Medicine Physician1952965394
- Arnold Rabin, M.D.Ophthalmology Physician1487606828
- Tana Summers, PAPhysician Assistant1134240633
- Kyra Toquinto, PHYSICIAN ASSISTANTMedical Physician Assistant1053158386
Verify Sandra L. Shefrin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G51116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average neurology physician in 2024
492 Medicare Part D claims for 102 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
Most prescribed
- Carbidopa-Levodopa121 claims
- Donepezil Hcl38 claims
- Gabapentin37 claims
- Lamotrigine33 claims
- Levetiracetam18 claims
- Carbidopa-Levodopa Er14 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.
Sandra L. Shefrin among 2,339 neurology physician records in California
Sandra L. Shefrin, M.D. is one of 2,339 neurology 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1978 · median 2006 among the 1,628 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Mill Valley → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Jonathan Rutchik, M.D.Mill Valley, CA 949411972559672
- Julie Griffith, MD MS, CMT, BCIPLagunitas, CA 949381083780621
- Jeremy Goodwin, MS, MDPetaluma, CA 949541366547614
- Jack Miller, MDPetaluma, CA 949541497824627
- Susan Goldwasser, M.D.Tiburon, CA 949201013091388
- Aditi Ahlawat, M.D.Sausalito, CA 949651104207901
- Robert Burton, MDSausalito, CA 949651063910669
- Rebecca DuttaSausalito, CA 949651639730922
Common questions
What is Sandra L. Shefrin, M.D.'s NPI number?
Sandra L. Shefrin, M.D.'s National Provider Identifier (NPI) is 1083665335, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sandra L. Shefrin, M.D. located?
The NPPES record lists a practice address at 279 Miller Ave, Mill Valley, CA, 94941. Phone: (415) 380-1950. Providers update this record themselves, so call before visiting.
How can I verify Sandra L. Shefrin, M.D.'s license?
NPPES lists California license number G51116, 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 Sandra L. Shefrin, M.D. prescribe under Medicare Part D?
In 2024, Sandra L. Shefrin, M.D. had 492 Medicare Part D claims for 102 beneficiaries; the average among neurology physician prescribers was 1,370. 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.