Marios Giannakis, MD
NPI 1417185729 · Medical Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marios Giannakis, MD is a Medical Oncology Physician provider in Boston, MA (NPI 1417185729).
Provider details
- NPI number
- 1417185729
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 240944 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
29 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 29 | $151 |
Typical Medicare-allowed amounts for these services range $151–$151 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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
- 2009-06-25
- Last updated
- 2016-06-27
Frequently asked questions
- What is Marios Giannakis's NPI number?
- Marios Giannakis's National Provider Identifier (NPI) is 1417185729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marios Giannakis's specialty?
- Marios Giannakis is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Marios Giannakis located?
- Marios Giannakis's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Marios Giannakis's phone number?
- The practice phone number listed in the NPPES registry for Marios Giannakis is (617) 732-6040.
- Does Marios Giannakis accept Medicare?
- Marios Giannakis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marios Giannakis's NPI active?
- Yes — Marios Giannakis's NPI (1417185729) is active in the NPPES registry as of the last update on 2016-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.