Guilherme Nader Marta, MD
NPI 1255105276 · Medical Oncology Physician · Boston, MA
Guilherme Nader Marta, MD is a Medical Oncology Physician provider in Boston, MA (NPI 1255105276).
Provider details
- NPI number
- 1255105276
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 3013973 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
2 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$187 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-11-09
- Last updated
- 2023-11-09
- Certified
- 2023-11-09
Frequently asked questions
- What is Guilherme Nader Marta's NPI number?
- Guilherme Nader Marta's National Provider Identifier (NPI) is 1255105276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guilherme Nader Marta's specialty?
- Guilherme Nader Marta is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Guilherme Nader Marta located?
- Guilherme Nader Marta's practice location on file with NPPES is 450 Brookline Ave, Boston, MA 02215-5450.
- What is Guilherme Nader Marta's phone number?
- The practice phone number listed in the NPPES registry for Guilherme Nader Marta is (617) 606-0601.
- Is Guilherme Nader Marta's NPI active?
- Yes — Guilherme Nader Marta's NPI (1255105276) is active in the NPPES registry as of the last update on 2023-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.