Brian G. Ash, M.D.
Anesthesiology Physician · Menlo Park, CA
Brian G. Ash, M.D. is an anesthesiology physician with a practice address in Menlo Park, California, and NPI 1962669531, issued on May 20, 2008. Check the license (California 103642, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian G. Ash
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 103642 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1422 EL Camino Real, Menlo Park, CA 94025
- Phone
- (650) 903-9500
- Enumerated
- May 20, 2008
- Record last updated
- Jun 20, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (650) 903-9900
- Medicare enrollment
- Enrolled (PECOS I20110627000608); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2006
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 1422 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nivedita Bhown, M.D.Anesthesiology Physician1154401792
- Mark Brown, M.D.Anesthesiology Physician1811067234
- Katarzyna Ciesielski, MDAnesthesiology Physician1033215587
- Martin Halum, MDAnesthesiology Physician1598096364
- Charles Kim, M.D.Anesthesiology Physician1790929602
- Alex Lee, M.D.Anesthesiology Physician1447324868
Verify Brian G. Ash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 103642Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- EL Camino AnesthesiaLos Gatos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian G. Ash among 7,571 anesthesiology physician records in California
Brian G. Ash, M.D. is one of 7,571 anesthesiology physician records with a practice address in California. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.
- NPI issued2008 · 57% of these records are older, 39% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2006 · median 2006 among the 4,868 with a school on file
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 anesthesiology physician records list a practice address in Menlo Park
They are 34 of the 1,265 NPPES records with a practice address in Menlo Park, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Menlo Park → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Nivedita Bhown, M.D.Menlo Park, CA 940251154401792
- Mark Brown, M.D.Menlo Park, CA 940251811067234
- Katarzyna Ciesielski, MDMenlo Park, CA 940251033215587
- Derek Liau, MDMenlo Park, CA 940251366557704
- Joseph McGee, M.D.Menlo Park, CA 940251336219740
- Daniel Mochizuki, MDMenlo Park, CA 940251790731123
- Trung Nguyen, M.D.Menlo Park, CA 940251316018765
- Dennis Pham, M.D.Menlo Park, CA 940251760553119
Common questions
What is Brian G. Ash, M.D.'s NPI number?
Brian G. Ash, M.D.'s National Provider Identifier (NPI) is 1962669531, issued on May 20, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Brian G. Ash, M.D. located?
The NPPES record lists a practice address at 1422 EL Camino Real, Menlo Park, CA, 94025. Phone: (650) 903-9500. Providers update this record themselves, so call before visiting.
How can I verify Brian G. Ash, M.D.'s license?
NPPES lists California license number 103642, 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.
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.