Quick answers
- Which hospitals does Mark E. Posnick work at?
- Medicare's official clinician data lists Mark E. Posnick at 3 hospitals: Lahey Hospital & Medical Center, Burlington, Southern NH Medical Center and St Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. Posnick see patients?
- Medicare's clinician data lists 1 practice location in Nashua, NH. Call before your visit to confirm the address.
- What is Mark E. Posnick's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mark E. Posnick accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Posnick 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 Mark E. Posnick?
- (603) 891-0083, as listed in official Medicare / NPI Registry data.
- What is Mark E. Posnick's NPI number?
- 1194218834. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark E. Posnick works
Medicare's Facility Affiliation Data lists Mark E. Posnick at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · CCN 220171
- Southern NH Medical CenterNashua, NH · Acute Care Hospital · CCN 300020
- St Joseph HospitalNashua, NH · Acute Care Hospital · CCN 300011
Practice locations
Addresses where Mark E. Posnick is enrolled with Medicare (CMS data updated 2026-10-02).
- 116 Spit Brook RdNashua, NH 03062 (603) 891‑0083
Group practices
Medicare enrollment lists Mark E. Posnick as a member of this group (CMS data updated 2026-10-02).
- Foundation Medical Partners Inc317 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Nashua
Clinicians with the same Medicare primary specialty in Nashua, NH — not a recommendation.
Clinician information
| Medical school | Lake Erie Col Of Osteopathic Medicine, Bradenton |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194218834 |
| 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