Josiah Bartlett Ambrose, MD
Neurology Physician · San Francisco, CA
Josiah Bartlett Ambrose, MD is a neurology physician with a practice address in San Francisco, California, and NPI 1699985747, issued on May 23, 2007. Check the license (California A99517, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Josiah Bartlett Ambrose
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A99517 CA
Self-reported in NPPES; status is on the state search - Practice location
- Ucsf Dept OF Neurology, San Francisco, CA 94143
- Phone
- (415) 353-3549
- Enumerated
- May 23, 2007
- Record last updated
- Feb 11, 2022
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Verify Josiah Bartlett Ambrose in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99517Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average neurology physician in 2024
795 Medicare Part D claims for 109 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
Most prescribed
- Clonazepam113 claims
- Lamotrigine94 claims
- Xcopri74 claims
- Lacosamide60 claims
- Levetiracetam44 claims
- Lamotrigine Er38 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.
Industry payments in 2024: $627.62
2 payments; by number, the most common kind was food and beverage; the largest payer was Neuropace, 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.
Josiah Bartlett Ambrose among 2,339 neurology physician records in California
Josiah Bartlett Ambrose, 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2022 · 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 San Francisco → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Adam Boxer, M.D.San Francisco, CA 941431841231800
- Dorothee Chabas Chanezon, M.D.San Francisco, CA 941431902832645
- Anthony Chen, MDSan Francisco, CA 941431609834472
- Jacob Elkins, M.D.San Francisco, CA 941431336180298
- Adam Gazzaley, MD PH DSan Francisco, CA 941431932142205
- John Hixson, MDSan Francisco, CA 941431336130475
- Catherine Hoerth, M.D.San Francisco, CA 941431063449866
- Viktoriya Irodenko, M.D.San Francisco, CA 941431023044997
Common questions
What is Josiah Bartlett Ambrose, MD's NPI number?
Josiah Bartlett Ambrose, MD's National Provider Identifier (NPI) is 1699985747, issued on May 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Josiah Bartlett Ambrose, MD located?
The NPPES record lists a practice address at Ucsf Dept OF Neurology, San Francisco, CA, 94143. Phone: (415) 353-3549. Providers update this record themselves, so call before visiting.
How can I verify Josiah Bartlett Ambrose, MD's license?
NPPES lists California license number A99517, 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 Josiah Bartlett Ambrose, MD prescribe under Medicare Part D?
In 2024, Josiah Bartlett Ambrose, MD had 795 Medicare Part D claims for 109 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.