Thomas Okamoto, M.D.
NPI 1235178021 · Psychiatry Physician · Santa Ana, CA
Thomas Okamoto, M.D. is a Psychiatry Physician provider in Santa Ana, CA (NPI 1235178021).
Provider details
- NPI number
- 1235178021
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G48164 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lamotrigine | 290 | 51 |
| Quetiapine Fumarate | 194 | 36 |
| Bupropion Hclbrand: Bupropion Xl | 168 | 27 |
| Trazodone Hcl | 119 | 27 |
| Vilazodone Hcl | 101 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 91 | — |
| Dextroamphetamine/Amphetamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,805 across 97 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2009-06-30
Frequently asked questions
- What is Thomas Okamoto's NPI number?
- Thomas Okamoto's National Provider Identifier (NPI) is 1235178021, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Okamoto's specialty?
- Thomas Okamoto is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Okamoto located?
- Thomas Okamoto's practice location on file with NPPES is 2130 E 4th St, Santa Ana, CA 92705-3818.
- What is Thomas Okamoto's phone number?
- The practice phone number listed in the NPPES registry for Thomas Okamoto is (714) 558-2460.
- Is Thomas Okamoto's NPI active?
- Yes — Thomas Okamoto's NPI (1235178021) is active in the NPPES registry as of the last update on 2009-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.