Chau Ton-That, D.O.
NPI 1205902301 · Psychiatry Physician · Westminster, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chau Ton-That, D.O. is a Psychiatry Physician provider in Westminster, CA (NPI 1205902301).
Provider details
- NPI number
- 1205902301
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A7177 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
737 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 701 | $98 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 36 | $204 |
Typical Medicare-allowed amounts for these services range $98–$204 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 1,208 | 184 |
| Sertraline Hcl | 1,205 | 164 |
| Quetiapine Fumarate | 894 | 108 |
| Olanzapine | 704 | 77 |
| Aripiprazole | 654 | 89 |
| Mirtazapine | 477 | 87 |
| Risperidone | 426 | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,408 across 57 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
Additional practice locations (1)
- 6b LibertySuite 115Aliso Viejo, CA 92656-5832Phone: (949) 699-3445Fax: (949) 218-8173
Registry dates
- Enumerated
- 2006-11-28
- Last updated
- 2018-04-26
Frequently asked questions
- What is Chau Ton-That's NPI number?
- Chau Ton-That's National Provider Identifier (NPI) is 1205902301, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chau Ton-That's specialty?
- Chau Ton-That is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Chau Ton-That located?
- Chau Ton-That's practice location on file with NPPES is 9533 Bolsa Ave, Westminster, CA 92683-5904.
- What is Chau Ton-That's phone number?
- The practice phone number listed in the NPPES registry for Chau Ton-That is (714) 531-8720.
- Does Chau Ton-That accept Medicare?
- Chau Ton-That is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chau Ton-That's NPI active?
- Yes — Chau Ton-That's NPI (1205902301) is active in the NPPES registry as of the last update on 2018-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.