Gehan Mahmoud, MD
NPI 1548845399 · Internal Medicine Physician · Staten Island, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gehan Mahmoud, MD is a Internal Medicine Physician provider in Staten Island, NY (NPI 1548845399).
Provider details
- NPI number
- 1548845399
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 335062 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 375 Seguine AveStaten Island, NY 10309-3932Phone: (718) 226-6902
Registry dates
- Enumerated
- 2021-03-12
- Last updated
- 2026-01-15
- Certified
- 2026-01-15
Frequently asked questions
- What is Gehan Mahmoud's NPI number?
- Gehan Mahmoud's National Provider Identifier (NPI) is 1548845399, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gehan Mahmoud's specialty?
- Gehan Mahmoud is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gehan Mahmoud located?
- Gehan Mahmoud's practice location on file with NPPES is 475 Seaview Ave, Staten Island, NY 10305-3436.
- What is Gehan Mahmoud's phone number?
- The practice phone number listed in the NPPES registry for Gehan Mahmoud is (717) 226-6902.
- Does Gehan Mahmoud accept Medicare?
- Gehan Mahmoud is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gehan Mahmoud's NPI active?
- Yes — Gehan Mahmoud's NPI (1548845399) is active in the NPPES registry as of the last update on 2026-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.