Quick answers
- Does Kimberly A. Mastis accept Medicare assignment?
- Medicare's clinician data says Kimberly A. Mastis may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Kimberly A. Mastis's NPI number?
- 1285791780. 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 Kimberly A. Mastis is enrolled with Medicare (CMS data updated October 2, 2026).
- 148 Worcester StWest Boylston, MA 01583 (508) 835‑1735
Group practices
Medicare enrollment lists Kimberly A. Mastis as a member of this group (CMS data updated October 2, 2026).
- Pediatric Behavioral Health LLC2 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Other clinicians in Pediatric Behavioral Health LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1285791780 |
| 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