Grant Seo, PSY.D.
NPI 1740597780 · Clinical Psychologist · Norwalk, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grant Seo, PSY.D. is a Clinical Psychologist provider in Norwalk, CA (NPI 1740597780).
Provider details
- NPI number
- 1740597780
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY26120 (CA)
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
15 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
- 2010-09-13
- Last updated
- 2022-09-18
- Certified
- 2022-09-18
Frequently asked questions
- What is Grant Seo's NPI number?
- Grant Seo's National Provider Identifier (NPI) is 1740597780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Seo's specialty?
- Grant Seo is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Grant Seo located?
- Grant Seo's practice location on file with NPPES is 11401 Bloomfield Ave, Norwalk, CA 90650-2015.
- What is Grant Seo's phone number?
- The practice phone number listed in the NPPES registry for Grant Seo is (562) 863-7011.
- Does Grant Seo accept Medicare?
- Grant Seo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grant Seo's NPI active?
- Yes — Grant Seo's NPI (1740597780) is active in the NPPES registry as of the last update on 2022-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.