Orestes Mavrothalassitis, MD
Anesthesiology Physician · San Francisco, CA
Orestes Mavrothalassitis, MD is an anesthesiology physician with a practice address in San Francisco, California, and NPI 1265937205, issued on Mar 29, 2018. Check the license (California A166612, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Orestes Mavrothalassitis
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A166612 CA
Self-reported in NPPES; status is on the state search - Practice location
- 500 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 476-4562
- Enumerated
- Mar 29, 2018
- Record last updated
- Sep 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20240617003913); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 500 Parnassus Ave
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Verify Orestes Mavrothalassitis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A166612Check 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
- University Anesthesia Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Orestes Mavrothalassitis among 7,571 anesthesiology physician records in California
Orestes Mavrothalassitis, 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 2018, is newer than 86% of them.
- NPI issued2018 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2018 · 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).
499 anesthesiology physician records list a practice address in San Francisco
They are 499 of the 38,143 NPPES records with a practice address in San Francisco, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in San Francisco → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Philip Bickler, MDSan Francisco, CA 941431245295450
- Ronald Braun, M.D.San Francisco, CA 941431700865367
- Neal Cohen, MDSan Francisco, CA 941431790740504
- Helge Eilers, MDSan Francisco, CA 941431134182884
- Adrian Gelb, MDSan Francisco, CA 941431568427185
- Michael Gropper, MDSan Francisco, CA 941431699730416
- Jeffrey Katz, MDSan Francisco, CA 941431295790913
- Terry Kim, MDSan Francisco, CA 941431972578524
Common questions
What is Orestes Mavrothalassitis, MD's NPI number?
Orestes Mavrothalassitis, MD's National Provider Identifier (NPI) is 1265937205, issued on Mar 29, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Orestes Mavrothalassitis, MD located?
The NPPES record lists a practice address at 500 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 476-4562. Providers update this record themselves, so call before visiting.
How can I verify Orestes Mavrothalassitis, MD's license?
NPPES lists California license number A166612, 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.