Active NPI
Clayton Long Chieu Chau, MD, PHD
- Psychiatry Physician
- Brea, CA
National Provider Identifier
1104914449
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- A64740
- Practice address
- 354 Olinda Dr
Brea, CA 92823-7040 - Phone
- (714) 248-4507
- Fax
- (714) 248-4507
- NPI assigned
- Oct 11, 2006
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Psychiatry Physician | 2084P0800X | A64740 | CA | Primary |
Addresses
Primary practice location
354 Olinda Dr
Brea, CA 92823-7040
Mailing address
354 Olinda Dr
Brea, CA 92823-7040
Phone (714) 248-4507
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine, Doctor of Philosophy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A64740 | CA | MD | Psychiatry Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| The Leon Institute | Current | Accepting new patients | |
| Truc H Dao, M.D., Inc | Psychiatry | Past | Accepting new patients |
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Community/Behavioral Health Agency
- Santa Ana, CA
- NPI 1629948393
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1160524800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1777420800000",
"number": "1104914449",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "354 OLINDA DR",
"city": "BREA",
"state": "CA",
"postal_code": "928237040",
"telephone_number": "714-248-4507",
"fax_number": "714-248-4507"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "354 OLINDA DR",
"city": "BREA",
"state": "CA",
"postal_code": "928237040",
"telephone_number": "714-248-4507",
"fax_number": "714-248-4507"
}
],
"practiceLocations": [],
"basic": {
"last_name": "CHAU",
"first_name": "CLAYTON",
"middle_name": "LONG CHIEU",
"name_prefix": "Dr.",
"credential": "MD, PHD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2006-10-11",
"last_updated": "2026-04-29",
"certification_date": "2026-04-29",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "CA",
"license": "A64740",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Brea, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.