Quick answers
- Which hospitals does Ali M. Duffens work at?
- Medicare's official clinician data lists Ali M. Duffens at 1 hospital: Holy Name Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ali M. Duffens see patients?
- Medicare's clinician data lists 1 practice location in Montvale, NJ. Call before your visit to confirm the address.
- What is Ali M. Duffens's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ali M. Duffens accept Medicare assignment?
- Yes. Medicare's clinician data says Ali M. Duffens accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Ali M. Duffens?
- (908) 542-3336, as listed in official Medicare / NPI Registry data.
- What is Ali M. Duffens's NPI number?
- 1568049922. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ali M. Duffens works
Medicare's Facility Affiliation Data lists Ali M. Duffens at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holy Name Medical CenterTeaneck, NJ · Acute Care Hospital · CCN 310008
Practice locations
Addresses where Ali M. Duffens is enrolled with Medicare (CMS data updated 2026-10-02).
- 225 Summit AveMontvale, NJ 07645 (908) 542‑3336
Group practices
Medicare enrollment lists Ali M. Duffens as a member of this group (CMS data updated 2026-10-02).
- MSK Bergen255 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in New Jersey
Clinicians with the same Medicare primary specialty in New Jersey — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Irvine California College Of Medicine |
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568049922 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians