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DR. GRANT SEO PSY.D.
NPI 1740597780
Psychologist - Clinical in Norwalk, CA

Active since September 13, 2010PECOS EnrolledAccepts Medicare Assignment
11401 BLOOMFIELD AVE, NORWALK, CA 90650(562) 863-7011 Get Directions Write a Review

NPPES record last updated: September 18, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 18, 2022, Feb 28, 2017, Aug 10, 2016 (3 updates tracked since 2016).

About Dr. Grant Seo Psy.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRANT SEO PSY.D. (NPI 1740597780) is an individual clinical provider in Norwalk, California, licensed in California (PSY26120) and active in the NPI registry since September 2010. He is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1740597780
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. GRANT SEOCredential: PSY.D.
Location Address11401 BLOOMFIELD AVENorwalk, CA 90650-2015
Mailing Address11401 Bloomfield AveNorwalk, CA 90650-2015
Phone(562) 863-7011
Sole ProprietorYes
Medical School CMSOtherGraduated 2011
Enumeration DateSeptember 13, 2010
Last NPPES UpdateSeptember 18, 20223 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2022
✔ NPI 1740597780 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in CA · PSY26120
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
11401 BLOOMFIELD AVE, Norwalk, CA 90650
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Grant Seo Psy.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID941620785
PECOS Enrollment IDI20201016002687
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Grant Seo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Department Of State Hospitals
Same address
Psychiatric Hospital
11401 BLOOMFIELD AVE
Norwalk, CA 90650
  • Reassigned Medicare billing, California enrollment
  • 755 clinicians in this Medicare group
NPI 1265406565 (562) 863-7011

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90650 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ARIANA VENTURA AYALA MSW
Social Worker (Clinical)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 584-1268
DR. MICHAEL WILLIAM BARSOM M.D
Psychiatry & Neurology (Psychiatry)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 863-7011
DR. CHRISTIAN DAVID MEYER PSYD
Psychologist
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 521-1489
JOSEPH PAREKATTIL JAMES MD
Psychiatry & Neurology (Psychiatry)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (951) 830-6639
MRS. PRECIOUS URE UDE RN
Registered Nurse (Psychiatric/Mental Health)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 863-7011
DR. ANGELA KIM GARLAND PSY.D.
Psychologist (Clinical)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 863-7011
SWARNALATHA RAMDEV M.D
Psychiatry & Neurology (Psychiatry)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 863-7011
DR. PAUL T ANANIAS II D.O.
Psychiatry & Neurology (Psychiatry)
11401 BLOOMFIELD AVE
NORWALK, CA 90650
Los Angeles County (562) 863-7011

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grant Seo's NPI number?

The NPI number for Grant Seo is 1740597780. It was assigned to this individual provider in the NPPES registry on September 13, 2010.

Where is Grant Seo located?

Grant Seo practices at 11401 Bloomfield Ave, Norwalk, CA 90650. The listed phone number is (562) 863-7011.

What is Grant Seo's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Grant Seo enrolled in Medicare?

Yes. Grant Seo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Grant Seo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grant Seo reassigns Medicare benefits to Department Of State Hospitals (Norwalk, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Grant Seo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Grant Seo was last updated on September 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.