Julie Mastnak, PH.D.
NPI 1962685826 · Clinical Psychologist · Saint Louis, MO
Julie Mastnak, PH.D. is a Clinical Psychologist provider in Saint Louis, MO (NPI 1962685826).
Provider details
- NPI number
- 1962685826
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 2006035362 (MO)
Specialties & taxonomies
Behavioral Health & Social 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
- 2007-12-13
- Last updated
- 2007-12-13
Frequently asked questions
- What is Julie Mastnak's NPI number?
- Julie Mastnak's National Provider Identifier (NPI) is 1962685826, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julie Mastnak's specialty?
- Julie Mastnak is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Julie Mastnak located?
- Julie Mastnak's practice location on file with NPPES is #1 Jefferson Barracks Drive, Saint Louis, MO 63125.
- What is Julie Mastnak's phone number?
- The practice phone number listed in the NPPES registry for Julie Mastnak is (314) 652-4100.
- Is Julie Mastnak's NPI active?
- Yes — Julie Mastnak's NPI (1962685826) is active in the NPPES registry as of the last update on 2007-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.