Ryan Butler Maher, M.D.
Anesthesiology Physician · Menlo Park, CA
Ryan Butler Maher, M.D. is an anesthesiology physician with a practice address in Menlo Park, California, and NPI 1831328418, issued on Jul 5, 2009. Check the license (California A116031, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ryan Butler Maher
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A116031 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
- Jul 5, 2009
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (650) 903-9900
- Medicare enrollment
- Enrolled (PECOS I20130723000355); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 2009
- 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.
- Brian Ash, M.D.Anesthesiology Physician1962669531
- 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
Verify Ryan Butler Maher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A116031Check 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
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Butler Maher among 7,571 anesthesiology physician records in California
Ryan Butler Maher, 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 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2009 · median 2006 among the 4,868 with a school on file
- Record last updated2021 · 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 Ryan Butler Maher, M.D.'s NPI number?
Ryan Butler Maher, M.D.'s National Provider Identifier (NPI) is 1831328418, issued on Jul 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Butler Maher, 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 Ryan Butler Maher, M.D.'s license?
NPPES lists California license number A116031, 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.