Brian Kobayashi, MD
NPI 1083293328 · Psychiatry Physician · Norwalk, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Kobayashi, MD is a Psychiatry Physician provider in Norwalk, CA (NPI 1083293328).
Provider details
- NPI number
- 1083293328
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A202025 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Quetiapine Fumarate | 30 |
| Clozapine | 24 |
| Duloxetine Hcl | 24 |
| Clonazepam | 23 |
| Divalproex Sodium | 19 |
| Fluoxetine Hcl | 19 |
| Gabapentin | 17 |
| Bupropion Hclbrand: Bupropion Xl | 15 |
| Lamotrigine | 14 |
Practice location
Mailing address
Additional practice locations (1)
- 3996 Vista WayOceanside, CA 92056-4507Phone: (760) 210-4240
Registry dates
- Enumerated
- 2021-04-05
- Last updated
- 2026-01-12
- Certified
- 2026-01-12
Frequently asked questions
- What is Brian Kobayashi's NPI number?
- Brian Kobayashi's National Provider Identifier (NPI) is 1083293328, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Kobayashi's specialty?
- Brian Kobayashi is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Kobayashi located?
- Brian Kobayashi's practice location on file with NPPES is 11401 Bloomfield Ave, Norwalk, CA 90650-2015.
- What is Brian Kobayashi's phone number?
- The practice phone number listed in the NPPES registry for Brian Kobayashi is (999) 999-9999.
- Does Brian Kobayashi accept Medicare?
- Brian Kobayashi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Kobayashi's NPI active?
- Yes — Brian Kobayashi's NPI (1083293328) is active in the NPPES registry as of the last update on 2026-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.