Quick answers
- Does Diane Mastroianni accept Medicare assignment?
- Medicare's clinician data says Diane Mastroianni may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Diane Mastroianni's NPI number?
- 1801322391. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Diane Mastroianni is enrolled with Medicare (CMS data updated October 2, 2026).
- 799 W Boylston St, Suite 220Worcester, MA 01606
Specialties
Find other clinicians: Occupational Therapist in Private Practice, Massachusetts →
Other occupational therapists in Worcester
Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.
Clinician information
| Credential | OT |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1801322391 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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