Quick answers
- Which hospitals does Payam Aghassi work at?
- Medicare's official clinician data lists Payam Aghassi at 5 hospitals: Athol Memorial Hospital, Heywood Hospital -, UMass Memorial Health - Harrington Hospital, UMass Memorial Healthalliance Hospitals and UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Payam Aghassi see patients?
- Medicare's clinician data lists 1 practice location in Leominster, MA. Call before your visit to confirm the address.
- What is Payam Aghassi's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Critical Care (Intensivists).
- Does Payam Aghassi accept Medicare assignment?
- Yes. Medicare's clinician data says Payam Aghassi 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 Payam Aghassi?
- (978) 798-6900, as listed in official Medicare / NPI Registry data.
- What is Payam Aghassi's NPI number?
- 1093704298. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Payam Aghassi works
Medicare's Facility Affiliation Data lists Payam Aghassi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Athol Memorial HospitalAthol, MA · Critical Access Hospital · CCN 221303
- Heywood Hospital -Gardner, MA · Acute Care Hospital · CCN 220095
- UMass Memorial Health - Harrington HospitalSouthbridge, MA · Acute Care Hospital · CCN 220019
- UMass Memorial Healthalliance HospitalsLeominster, MA · Acute Care Hospital · CCN 220001
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · CCN 220163
Practice locations
Addresses where Payam Aghassi is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Hospital Rd, Suite 2aLeominster, MA 01453 (978) 798‑6900
Group practices
Medicare enrollment lists Payam Aghassi as a member of this group (CMS data updated 2026-10-02).
- Mass Lung and Allergy PC10 clinicians in the group
Specialties
Other pulmonologists in Leominster
Clinicians with the same Medicare primary specialty in Leominster, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1093704298 |
| 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