Michael A. Ruiz, MD
Pediatrics Physician · San Ramon, CA
Michael A. Ruiz, MD is a pediatrics physician with a practice address in San Ramon, California, and NPI 1588632673, issued on Mar 14, 2006. Check the license (California A64848, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael A. Ruiz
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A64848 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Porter Dr, San Ramon, CA 94583
- Phone
- (925) 838-6500
- Enumerated
- Mar 14, 2006
- Record last updated
- May 15, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (925) 838-6542
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 200 Porter Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mir Ali, M.D.Anesthesiology Physician1417912726
- Laura Anaya, PAPhysician Assistant1316117682
- Claudine Cho, PNPPediatric Nurse Practitioner1285005074
- Julie Choate, PTPhysical Therapist1124060470
- Arthur Chu, PTPhysical Therapist1477812998
- Robin Dennings, M.D.Anesthesiology Physician1649265349
Verify Michael A. Ruiz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64848Check 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: $163.59
4 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 21,580 providers of this specialty with any payment received $842.05 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.
Michael A. Ruiz among 9,272 pediatrics physician records in California
Michael A. Ruiz, MD is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 56% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2008 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 pediatrics physician records list a practice address in San Ramon
They are 22 of the 2,281 NPPES records with a practice address in San Ramon, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in San Ramon → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Richard Ash, MDSan Ramon, CA 945831366445298
- Cynthia Hann, MDSan Ramon, CA 945831750372389
- Colleen Hogan, MDSan Ramon, CA 945831992795124
- Toril Jelter, MDSan Ramon, CA 945831447219902
- Erin Lee, M.D.San Ramon, CA 945831316979602
- Thomas Long, MDSan Ramon, CA 945831801887930
- Allen Obrinsky, MDSan Ramon, CA 945831831180132
- Cynthia Quan, MDSan Ramon, CA 945831659330249
Common questions
What is Michael A. Ruiz, MD's NPI number?
Michael A. Ruiz, MD's National Provider Identifier (NPI) is 1588632673, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Ruiz, MD located?
The NPPES record lists a practice address at 200 Porter Dr, San Ramon, CA, 94583. Phone: (925) 838-6500. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Ruiz, MD's license?
NPPES lists California license number A64848, 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.