Grahamm Wiest, PSY.D.
NPI 1962015628 · Clinical Neuropsychologist · Mission Viejo, CA
Enrolled with Medicare as Practitioner - Neuropsychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grahamm Wiest, PSY.D. is a Clinical Neuropsychologist provider in Mission Viejo, CA (NPI 1962015628).
Provider details
- NPI number
- 1962015628
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Psychologist103T00000X
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 1110 E Chapman Ave Ste 202Orange, CA 92866-2139Phone: (714) 744-9754
Registry dates
- Enumerated
- 2020-08-24
- Last updated
- 2025-07-15
- Certified
- 2025-07-15
Frequently asked questions
- What is Grahamm Wiest's NPI number?
- Grahamm Wiest's National Provider Identifier (NPI) is 1962015628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grahamm Wiest's specialty?
- Grahamm Wiest is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is Grahamm Wiest located?
- Grahamm Wiest's practice location on file with NPPES is 26800 Crown Valley Pkwy Ste 320, Mission Viejo, CA 92691-7320.
- What is Grahamm Wiest's phone number?
- The practice phone number listed in the NPPES registry for Grahamm Wiest is (949) 365-2468.
- Does Grahamm Wiest accept Medicare?
- Grahamm Wiest is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grahamm Wiest's NPI active?
- Yes — Grahamm Wiest's NPI (1962015628) is active in the NPPES registry as of the last update on 2025-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.