Active NPI
Gillian Steffey
- Marriage & Family Therapist
- Oceanside, CA
National Provider Identifier
1689525131
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Marriage & Family Therapist
- License
- 158125
- Practice address
- 3220 Mission Ave Ste 2
Oceanside, CA 92058-1354 - Phone
- (760) 512-8883
- NPI assigned
- Feb 9, 2026
- Sex
- Female
- 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 |
|---|---|---|---|---|
| Marriage & Family Therapist | 106H00000X | 158125 | CA | Primary |
Addresses
Primary practice location
3220 Mission Ave Ste 2
Oceanside, CA 92058-1354
Mailing address
3220 Mission Ave Ste 2
Oceanside, CA 92058-1354
Phone (760) 512-8883
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 |
|---|---|---|---|
| 158125 | CA | MD | Marriage & Family Therapist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1770595200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770595200000",
"number": "1689525131",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3220 MISSION AVE STE 2",
"city": "OCEANSIDE",
"state": "CA",
"postal_code": "920581354",
"telephone_number": "760-512-8883"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3220 MISSION AVE STE 2",
"city": "OCEANSIDE",
"state": "CA",
"postal_code": "920581354",
"telephone_number": "760-512-8883"
}
],
"practiceLocations": [],
"basic": {
"last_name": "STEFFEY",
"first_name": "GILLIAN",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2026-02-09",
"last_updated": "2026-02-09",
"certification_date": "2026-02-09",
"status": "A"
},
"taxonomies": [
{
"code": "106H00000X",
"taxonomy_group": "",
"desc": "Marriage & Family Therapist",
"state": "CA",
"license": "158125",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Oceanside, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 9, 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.