Kimberly Mastis, M.D.
NPI 1285791780 · Psychiatry Physician · West Boylston, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kimberly Mastis, M.D. is a Psychiatry Physician provider in West Boylston, MA (NPI 1285791780).
Provider details
- NPI number
- 1285791780
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 236381 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Quetiapine Fumaratebrand: Quetiapine Fumarate Er | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-03
- Last updated
- 2012-05-02
Frequently asked questions
- What is Kimberly Mastis's NPI number?
- Kimberly Mastis's National Provider Identifier (NPI) is 1285791780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kimberly Mastis's specialty?
- Kimberly Mastis is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Kimberly Mastis located?
- Kimberly Mastis's practice location on file with NPPES is 148 Worcester St, West Boylston, MA 01583-1751.
- What is Kimberly Mastis's phone number?
- The practice phone number listed in the NPPES registry for Kimberly Mastis is (508) 835-1735.
- Does Kimberly Mastis accept Medicare?
- Kimberly Mastis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kimberly Mastis's NPI active?
- Yes — Kimberly Mastis's NPI (1285791780) is active in the NPPES registry as of the last update on 2012-05-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.