Benjamin Massat
NPI 1659909711 · Hematology & Oncology Physician · Maywood, IL
Enrolled with Medicare as Order and Referring Only - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Benjamin Massat is a Hematology & Oncology Physician provider in Maywood, IL (NPI 1659909711).
Provider details
- NPI number
- 1659909711
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 036165424 (IL)
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
6 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.
$185 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
- 2020-04-01
- Last updated
- 2023-06-23
- Certified
- 2023-06-23
Frequently asked questions
- What is Benjamin Massat's NPI number?
- Benjamin Massat's National Provider Identifier (NPI) is 1659909711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Benjamin Massat's specialty?
- Benjamin Massat is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Benjamin Massat located?
- Benjamin Massat's practice location on file with NPPES is 2160 S 1st Ave, Maywood, IL 60153-3328.
- What is Benjamin Massat's phone number?
- The practice phone number listed in the NPPES registry for Benjamin Massat is (888) 584-7888.
- Does Benjamin Massat accept Medicare?
- Benjamin Massat is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Benjamin Massat's NPI active?
- Yes — Benjamin Massat's NPI (1659909711) is active in the NPPES registry as of the last update on 2023-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.