Peter Anastassiou, M.D.
NPI 1912904806 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Anastassiou, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in San Francisco, CA (NPI 1912904806).
Provider details
- NPI number
- 1912904806
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A43203 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
224 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 80 | $190 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $105 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 35 | $189 |
| Removal of Lymph Nodes of Chest Cavity Using an Endoscope32674 | 16 | $215 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $149 |
Typical Medicare-allowed amounts for these services range $105–$215 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-07
- Last updated
- 2015-06-10
Frequently asked questions
- What is Peter Anastassiou's NPI number?
- Peter Anastassiou's National Provider Identifier (NPI) is 1912904806, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Anastassiou's specialty?
- Peter Anastassiou is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Anastassiou located?
- Peter Anastassiou's practice location on file with NPPES is 2100 Webster St, San Francisco, CA 94115-2373.
- What is Peter Anastassiou's phone number?
- The practice phone number listed in the NPPES registry for Peter Anastassiou is (415) 600-7860.
- Does Peter Anastassiou accept Medicare?
- Peter Anastassiou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Anastassiou's NPI active?
- Yes — Peter Anastassiou's NPI (1912904806) is active in the NPPES registry as of the last update on 2015-06-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.