John Masaryk, MD
NPI 1366404840 · Emergency Medicine Physician · Tooele, UT
John Masaryk, MD is a Emergency Medicine Physician provider in Tooele, UT (NPI 1366404840).
Provider details
- NPI number
- 1366404840
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 176280-1205 (UT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-04-03
- Last updated
- 2010-05-04
Frequently asked questions
- What is John Masaryk's NPI number?
- John Masaryk's National Provider Identifier (NPI) is 1366404840, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Masaryk's specialty?
- John Masaryk is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Masaryk located?
- John Masaryk's practice location on file with NPPES is 2055 N Main St, Tooele, UT 84074-9819.
- What is John Masaryk's phone number?
- The practice phone number listed in the NPPES registry for John Masaryk is (435) 843-3600.
- Is John Masaryk's NPI active?
- Yes — John Masaryk's NPI (1366404840) is active in the NPPES registry as of the last update on 2010-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.