Isaac Gendelman, MD
NPI 1407484843 · Surgery Physician · Boston, MA
Enrolled with Medicare as Order and Referring Only - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Gendelman, MD is a Surgery Physician provider in Boston, MA (NPI 1407484843).
Provider details
- NPI number
- 1407484843
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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 tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
83% 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.
$450 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
- 2020-03-31
- Last updated
- 2020-06-15
- Certified
- 2020-06-15
Frequently asked questions
- What is Isaac Gendelman's NPI number?
- Isaac Gendelman's National Provider Identifier (NPI) is 1407484843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Gendelman's specialty?
- Isaac Gendelman is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac Gendelman located?
- Isaac Gendelman's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Isaac Gendelman's phone number?
- The practice phone number listed in the NPPES registry for Isaac Gendelman is (617) 636-5000.
- Does Isaac Gendelman accept Medicare?
- Isaac Gendelman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Gendelman's NPI active?
- Yes — Isaac Gendelman's NPI (1407484843) is active in the NPPES registry as of the last update on 2020-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.