Steven Mason Ronilo, MD
Anesthesiology Physician · Stanford, CA
Steven Mason Ronilo, MD is an anesthesiology physician with a practice address in Stanford, California, and NPI 1942821194, issued on Apr 29, 2020. Check the license (California A189026, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Mason Ronilo
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A189026 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Drive, Lane 154, Stanford, CA 94305
- Phone
- (650) 723-6661
- Enumerated
- Apr 29, 2020
- Record last updated
- Dec 4, 2024
- Fax
- (650) 498-6205
- Medicare enrollment
- Enrolled (PECOS I20250709001962); may accept Medicare assignment
- Medical or professional school
- Un Of California, Irvine, College Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 300 Pasteur Drive, Lane 154
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Carter BoughtonStudent in an Organized Health Care Education/Training Program1437851664
Verify Steven Mason Ronilo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189026Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $36.28
1 payment: food and beverage; the largest payer was Pacira Pharmaceuticals Incorporated. The 17,774 providers of this specialty with any payment received $669.59 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.
Steven Mason Ronilo among 7,571 anesthesiology physician records in California
Steven Mason Ronilo, MD 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 2020, is newer than 92% of them.
- NPI issued2020 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2020 · median 2006 among the 4,868 with a school on file
- Record last updated2024 · 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).
387 anesthesiology physician records list a practice address in Stanford
They are 387 of the 5,606 NPPES records with a practice address in Stanford, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Stanford → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Aileen Adriano, MDStanford, CA 943051558311886
- Martin Angst, MDStanford, CA 943051386694529
- Rhett Atkinson, M.D.Stanford, CA 943051558328005
- Edward Baer, M.D.Stanford, CA 943051710945837
- William Bohman, M.D.Stanford, CA 943051265490387
- Bryan Bohman, MDStanford, CA 943051285692368
- Michael Champeau, M.D.Stanford, CA 943051538126099
- Anthony Doufas, MDStanford, CA 943051578531430
Common questions
What is Steven Mason Ronilo, MD's NPI number?
Steven Mason Ronilo, MD's National Provider Identifier (NPI) is 1942821194, issued on Apr 29, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Steven Mason Ronilo, MD located?
The NPPES record lists a practice address at 300 Pasteur Drive, Lane 154, Stanford, CA, 94305. Phone: (650) 723-6661. Providers update this record themselves, so call before visiting.
How can I verify Steven Mason Ronilo, MD's license?
NPPES lists California license number A189026, 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.