Stephen Hsien-Chih Lo, MD
Anesthesiology Physician · Pleasanton, CA
Stephen Hsien-Chih Lo, MD is an anesthesiology physician with a practice address in Pleasanton, California, and NPI 1558398719, issued on Jun 26, 2006. Check the license (California A65887, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Stephen Hsien-Chih Lo
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A65887 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4487 Stoneridge Dr, Pleasanton, CA 94588
- Phone
- (925) 600-1900
- Enumerated
- Jun 26, 2006
- Record last updated
- Oct 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (925) 600-1908
- Medicaid ID
- 00A658870 CA
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 4487 Stoneridge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Currie Lee, MDAnesthesiology Physician1568629707
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Verify Stephen Hsien-Chih Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A65887Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Stephen Hsien-Chih Lo among 7,571 anesthesiology physician records in California
Stephen Hsien-Chih Lo, 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 not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- 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).
Anesthesiology Physician providers in California
There are 7,571 anesthesiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,571 in California → Every provider in Pleasanton → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Urmila Kamdar, MDPleasanton, CA 945881811907389
- Currie Lee, MDPleasanton, CA 945881568629707
- Hansi Zhao, M.D.Pleasanton, CA 945881811347123
- Tara Hojiwala, MDVallejo, CA 945891861435190
- Judith Hwang, MDVallejo, CA 945891528043445
- Wayne Lee, M.D.Union City, CA 945871740529593
- Caroline Lin, M.D.Vallejo, CA 945891659349496
- Edmund Marroquin, MDVallejo, CA 945891215981469
Common questions
What is Stephen Hsien-Chih Lo, MD's NPI number?
Stephen Hsien-Chih Lo, MD's National Provider Identifier (NPI) is 1558398719, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Hsien-Chih Lo, MD located?
The NPPES record lists a practice address at 4487 Stoneridge Dr, Pleasanton, CA, 94588. Phone: (925) 600-1900. Providers update this record themselves, so call before visiting.
How can I verify Stephen Hsien-Chih Lo, MD's license?
NPPES lists California license number A65887, 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. 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.