Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Orestes Mavrothalassitis, MD

Individual provider Anesthesiology Physician · NPI 1265937205

Orestes Mavrothalassitis, MD practises Anesthesiology in San Francisco, California. Graduated from University of Maryland School of Medicine in 2018, 8 years ago. Practices with University Anesthesia Medical Group, a 404-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
8
Trained at
University of Maryland School of Medicine
Licensed in
CA
In the registry since
2018
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

500 Parnassus Ave
San Francisco, CA 94143-2203
Phone: (415) 476-4562
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A166612 (CA)

Record details

NPI number1265937205
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2018
Last updated in NPPESSeptember 12, 2024
Certification dateSeptember 12, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice University Anesthesia Medical Group — 404 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients76
Services billed 85 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Ucsf Medical Center Hospital · San Francisco, CA
  • Ucsf Health St. Mary'S Hospital Hospital · San Francisco, CA

Colleagues at University Anesthesia Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 404 clinicians in the practice; 12 are shown here.

Other providers in San Francisco