Active NPI
Halsey Newbrough Simmons, M.F.T.
- Marriage & Family Therapist
- Pleasant Hill, CA
National Provider Identifier
1164585444
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Marriage & Family Therapist
- License
- 30120
- Practice address
- 140 Mayhew Way Ste 300
Pleasant Hill, CA 94523-4398 - Phone
- (707) 315-8889
- Fax
- (888) 488-6656
- NPI assigned
- Dec 18, 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 |
|---|---|---|---|---|
| Marriage & Family Therapist | 106H00000X | 30120 | CA | Primary |
Addresses
Primary practice location
140 Mayhew Way Ste 300
Pleasant Hill, CA 94523-4398
Mailing address
533 E J St
Benicia, CA 94510-3433
Phone (707) 315-8889
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 30120 | Other | CA | LICENSE NUMBER |
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 |
|---|---|---|---|
| 30120 | CA | MD | General Practice Dentistry |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1166400000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1742256000000",
"number": "1164585444",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "533 E J ST",
"city": "BENICIA",
"state": "CA",
"postal_code": "945103433",
"telephone_number": "707-315-8889",
"fax_number": "888-488-6656"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "140 MAYHEW WAY STE 300",
"city": "PLEASANT HILL",
"state": "CA",
"postal_code": "945234398",
"telephone_number": "707-315-8889",
"fax_number": "888-488-6656"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SIMMONS",
"first_name": "HALSEY",
"middle_name": "NEWBROUGH",
"credential": "M.F.T.",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2006-12-18",
"last_updated": "2025-03-18",
"certification_date": "2025-03-14",
"status": "A"
},
"taxonomies": [
{
"code": "106H00000X",
"taxonomy_group": "",
"desc": "Marriage & Family Therapist",
"state": "CA",
"license": "30120",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "LICENSE NUMBER",
"identifier": "30120",
"state": "CA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Pleasant Hill, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 18, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.