Quick answers
- Which hospitals does Jon C. Aster work at?
- Medicare's official clinician data lists Jon C. Aster at 2 hospitals: Brigham and Women's Hospital and Massachusetts General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jon C. Aster see patients?
- Medicare's clinician data lists 1 practice location in Boston, MA. Call before your visit to confirm the address.
- What is Jon C. Aster's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Jon C. Aster accept Medicare assignment?
- Yes. Medicare's clinician data says Jon C. Aster 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 Jon C. Aster?
- (617) 732-5500, as listed in official Medicare / NPI Registry data.
- What is Jon C. Aster's NPI number?
- 1023075702. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jon C. Aster works
Medicare's Facility Affiliation Data lists Jon C. Aster at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Brigham and Women's HospitalBoston, MA · Acute Care Hospital · CCN 220110
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · CCN 220071
Practice locations
Addresses where Jon C. Aster is enrolled with Medicare (CMS data updated 2026-10-02).
- 75 Francis StBoston, MA 02115 (617) 732‑5500
Group practices
Medicare enrollment lists Jon C. Aster as a member of this group (CMS data updated 2026-10-02).
- Brigham and Womens Physicians Organization Inc2,994 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023075702 |
| 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