William Mashtalier, MPT
NPI 1235309881 · Physical Therapist · Phelan, CA
William Mashtalier, MPT is a Physical Therapist provider in Phelan, CA (NPI 1235309881).
Provider details
- NPI number
- 1235309881
- Entity type
- Individual
- Primary specialty
- Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- MPT
- Sex
- Male
- Sole proprietor
- Yes
- License
- 22762 (CA)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-03-10
- Last updated
- 2008-03-10
Frequently asked questions
- What is William Mashtalier's NPI number?
- William Mashtalier's National Provider Identifier (NPI) is 1235309881, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mashtalier's specialty?
- William Mashtalier is listed in the NPPES registry with a primary specialty of Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is William Mashtalier located?
- William Mashtalier's practice location on file with NPPES is 3936 Phelan Rd, Phelan, CA 92371-4141.
- What is William Mashtalier's phone number?
- The practice phone number listed in the NPPES registry for William Mashtalier is (760) 220-6932.
- Is William Mashtalier's NPI active?
- Yes — William Mashtalier's NPI (1235309881) is active in the NPPES registry as of the last update on 2008-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.