Quick answers
- Which hospitals does Dennis Tan work at?
- Medicare's official clinician data lists Dennis Tan at 2 hospitals: Mount Auburn Hospital and Winchester Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Dennis Tan see patients?
- Medicare's clinician data lists 2 practice locations, including Arlington, MA and Lexington, MA. Call before your visit to confirm the address.
- What is Dennis Tan's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Dennis Tan accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis Tan 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.
- Does Dennis Tan offer telehealth?
- Medicare's clinician data says Dennis Tan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Dennis Tan?
- (781) 646-2848, as listed in official Medicare / NPI Registry data.
- What is Dennis Tan's NPI number?
- 1255903696. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Dennis Tan works
Medicare's Facility Affiliation Data lists Dennis Tan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Auburn HospitalCambridge, MA · Acute Care Hospital · CCN 220002
- Winchester HospitalWinchester, MA · Acute Care Hospital · CCN 220105
Practice locations
Addresses where Dennis Tan is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 Mill St, Suite 208Arlington, MA 02476 (781) 646‑2848
- 57 Bedford St, Suite 130Lexington, MA 02420 (781) 862‑7500
Group practices
Medicare enrollment lists Dennis Tan as a member of this group (CMS data updated 2026-10-02).
- Mount Auburn Professional Services Inc231 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Arlington
Clinicians with the same Medicare primary specialty in Arlington, MA — not a recommendation.
Clinician information
| Graduation year | 2022 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255903696 |
| 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