Jacob Walter Loeffler, MD
Neurology Physician · Stanford, CA
Jacob Walter Loeffler, MD is a neurology physician with a practice address in Stanford, California, and NPI 1497294656, issued on Feb 21, 2017. Check the license (California A189613, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jacob Walter Loeffler
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A189613 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Feb 21, 2017
- Record last updated
- Jul 17, 2025
- Medicare enrollment
- Enrolled (PECOS I20250313002384); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jacob Walter Loeffler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189613Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average neurology physician in 2024
22 Medicare Part D claims for 12 beneficiaries, against an average of 1,370 among the 15,005 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.
Industry payments in 2024: $124.83
1 payment: food and beverage; the largest payer was Amgen Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Jacob Walter Loeffler among 2,339 neurology physician records in California
Jacob Walter Loeffler, MD 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 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2020 · median 2006 among the 1,628 with a school on file
- Record last updated2025 · 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).
78 neurology physician records list a practice address in Stanford
They are 78 of the 5,606 NPPES records with a practice address in Stanford, and 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Stanford → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Sheena Aurora, MBBSStanford, CA 943051346303716
- Leslie Dorfman, MDStanford, CA 943051255382065
- Jeffrey Dunn, MDStanford, CA 943051639123383
- Erik Ensrud, MDStanford, CA 943051982658738
- Anna Finley Caulfield, M.D.Stanford, CA 943051851358097
- Hideki Garren, MDStanford, CA 943051407807183
- Michael Greicius, MDStanford, CA 943051861443509
- Frank Longo, MD, PHDStanford, CA 943051801966254
Common questions
What is Jacob Walter Loeffler, MD's NPI number?
Jacob Walter Loeffler, MD's National Provider Identifier (NPI) is 1497294656, issued on Feb 21, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Jacob Walter Loeffler, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Jacob Walter Loeffler, MD's license?
NPPES lists California license number A189613, 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 Jacob Walter Loeffler, MD prescribe under Medicare Part D?
In 2024, Jacob Walter Loeffler, MD had 22 Medicare Part D claims for 12 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.