Stephanie Holzner, PH.D.
NPI 1598880189 · Psychologist · Placentia, CA
Stephanie Holzner, PH.D. is a Psychologist provider in Placentia, CA (NPI 1598880189).
Provider details
- NPI number
- 1598880189
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY11979 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-20
- Last updated
- 2021-06-15
- Certified
- 2021-05-24
Frequently asked questions
- What is Stephanie Holzner's NPI number?
- Stephanie Holzner's National Provider Identifier (NPI) is 1598880189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Holzner's specialty?
- Stephanie Holzner is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Stephanie Holzner located?
- Stephanie Holzner's practice location on file with NPPES is 101 S Kraemer Blvd Ste 211, Placentia, CA 92870.
- What is Stephanie Holzner's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Holzner is (562) 882-2141.
- Is Stephanie Holzner's NPI active?
- Yes — Stephanie Holzner's NPI (1598880189) is active in the NPPES registry as of the last update on 2021-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.