Active NPI
Sandra K. Siefken, LPC, LISAC
- Counselor
- Anthem, AZ
National Provider Identifier
1871690933
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Counselor
- License
- LPC10450
- Practice address
- 40820 N Trailhead Way
Anthem, AZ 85086-4941 - Phone
- (602) 828-8783
- NPI assigned
- Sep 20, 2006
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Counselor | 101Y00000X | LPC10450 | AZ | Primary |
| Addiction (Substance Use Disorder) Counselor | 101YA0400X | LISAC1477 | AZ |
Addresses
Primary practice location
40820 N Trailhead Way
Anthem, AZ 85086-4941
Mailing address
40820 N Trailhead Way
Anthem, AZ 85086-4941
Phone (602) 828-8783
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 |
|---|---|---|---|
| LPC10450 | AZ | MD | Counselor |
| LISAC1477 | AZ | MD | Addiction (Substance Use Disorder) Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1158710400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1778803200000",
"number": "1871690933",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "40820 N TRAILHEAD WAY",
"city": "ANTHEM",
"state": "AZ",
"postal_code": "850864941",
"telephone_number": "602-828-8783"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "40820 N TRAILHEAD WAY",
"city": "ANTHEM",
"state": "AZ",
"postal_code": "850864941",
"telephone_number": "602-828-8783"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SIEFKEN",
"first_name": "SANDRA",
"middle_name": "K.",
"name_prefix": "Ms.",
"credential": "LPC, LISAC",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2006-09-20",
"last_updated": "2026-05-15",
"certification_date": "2026-05-15",
"status": "A"
},
"taxonomies": [
{
"code": "101Y00000X",
"taxonomy_group": "",
"desc": "Counselor",
"state": "AZ",
"license": "LPC10450",
"primary": true
},
{
"code": "101YA0400X",
"taxonomy_group": "",
"desc": "Counselor, Addiction (Substance Use Disorder)",
"state": "AZ",
"license": "LISAC1477",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Anthem, AZ
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 15, 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.