Peter Anastassiou, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · San Francisco, CA
Peter Anastassiou, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in San Francisco, California, and NPI 1912904806, issued on Jul 7, 2005. Check the license (California A43203, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Anastassiou
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- A43203 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Webster St, San Francisco, CA 94115
- Phone
- (415) 600-7860
- Enumerated
- Jul 7, 2005
- Entity
- Type 1 · individual
Also registered at 2100 Webster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arthur Allen, MDOphthalmology Physician1255332334
- Anait Ambarian, ODOptometrist1992032411
- William Andereck, M.D.Internal Medicine Physician1699800219
- Jennifer Austin, LCSWClinical Social Worker1669878492
- Amy Baertson, R.DRegistered Dietitian1598914202
- Barry Baron, MDSpecialist1467563353
Verify Peter Anastassiou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A43203Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
75% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
30 Medicare Part D claims for 20 beneficiaries, against an average of 119 among the 2,088 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
One hospital or facility affiliation
- Sutter Bay Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 516 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
Other thoracic surgery (cardiothoracic vascular surgery) physician records in California
- Kelechi Abanobi, M.DLos Angeles, CA1720236953
- Amir Abolhoda, MDOrange, CA1891875951
- Robert Adamson, M.D.San Diego, CA1043292584
- Ricardo Aguirre, MDDanville, CA1699739219
- Palash Aiyer, MDSan Francisco, CA1649832213
- Akbarshakh Akhmerov, MDWest Hollywood, CA1215464276
- Talal Al-Atassi, MD, CM, MPH, FRCSCLos Angeles, CA1871985309
- Mir Ali, MDSan Bernardino, CA1831301647
- Abdulaziz Alkhaldi, MDStanford, CA1366475188
- Bradley Allen, M.D.Los Angeles, CA1750309522
Common questions
What is Peter Anastassiou, M.D.'s NPI number?
Peter Anastassiou, M.D.'s National Provider Identifier (NPI) is 1912904806, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Peter Anastassiou, M.D. located?
The NPPES record lists a practice address at 2100 Webster St, San Francisco, CA, 94115. Phone: (415) 600-7860. Providers update this record themselves, so call before visiting.
How can I verify Peter Anastassiou, M.D.'s license?
NPPES lists California license number A43203, 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.
How much does Peter Anastassiou, M.D. prescribe under Medicare Part D?
In 2024, Peter Anastassiou, M.D. had 30 Medicare Part D claims for 20 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 119. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.