Active NPI
Steven Patrick Underwood, DDS
- General Practice Dentistry
- Fountain Valley, CA
National Provider Identifier
1093705139
On this page
Key facts
NPPES NPI Registry- Primary specialty
- General Practice Dentistry
- License
- 26712
- Practice address
- 18430 Brookhurst St
Suite 104
Fountain Valley, CA 92708-6726 - Phone
- (714) 963-4774
- Fax
- (714) 962-8838
- NPI assigned
- Oct 27, 2005
- Sex
- Male
- Sole proprietor
- No
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 |
|---|---|---|---|---|
| General Practice Dentistry | 1223G0001X | 26712 | CA | Primary |
Addresses
Primary practice location
18430 Brookhurst St
Suite 104
Fountain Valley, CA 92708-6726
Mailing address
18430 Brookhurst St
Suite 104
Fountain Valley, CA 92708-6726
Phone (714) 963-4774
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)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 26712 | CA | MD | Clinical Social Worker |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1130371200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1093705139",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "18430 BROOKHURST ST",
"address_2": "SUITE 104",
"city": "FOUNTAIN VALLEY",
"state": "CA",
"postal_code": "927086726",
"telephone_number": "714-963-4774",
"fax_number": "714-962-8838"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "18430 BROOKHURST ST",
"address_2": "SUITE 104",
"city": "FOUNTAIN VALLEY",
"state": "CA",
"postal_code": "927086726",
"telephone_number": "714-963-4774",
"fax_number": "714-962-8838"
}
],
"practiceLocations": [],
"basic": {
"last_name": "UNDERWOOD",
"first_name": "STEVEN",
"middle_name": "PATRICK",
"name_prefix": "Dr.",
"credential": "DDS",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-10-27",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "1223G0001X",
"taxonomy_group": "",
"desc": "Dentist, General Practice",
"state": "CA",
"license": "26712",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Fountain Valley, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.