Andrew B. Sieff, A.P.N., B.C.

Primary specialty

Adult Psychiatric/Mental Health Clinical Nurse SpecialistTaxonomy code 364SP0809X

License

S01096 Issued in AR

Practice address

111 E Davidson St
Fayetteville, AR 72701-3413

Phone

(479) 871-2005

Fax

(479) 582-1085

NPI assigned

May 16, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Ozark Counseling Services Inc

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Mountain Home, AR
  • NPI 1043266315
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1147737600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1568414191",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "11183 BLACK OAK ADDITION",
            "city": "FAYETTEVILLE",
            "state": "AR",
            "postal_code": "727010787",
            "telephone_number": "479-871-2005",
            "fax_number": "479-582-1085"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "111 E DAVIDSON ST",
            "city": "FAYETTEVILLE",
            "state": "AR",
            "postal_code": "727013413",
            "telephone_number": "479-871-2005",
            "fax_number": "479-582-1085"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIEFF",
        "first_name": "ANDREW",
        "middle_name": "B.",
        "name_prefix": "Mr.",
        "credential": "A.P.N., B.C.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-16",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "364SP0809X",
            "taxonomy_group": "",
            "desc": "Clinical Nurse Specialist, Psychiatric/Mental Health, Adult",
            "state": "AR",
            "license": "S01096",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jennifer Shumaker
• Carmen Shumpert, M.S.,CCC-SLP
• Tiffany Shumpert
• Heather Shy, LPC
• Rachel Danielle Siebenmorgen
• Wilby M Siegler, APRN
• Angel Sigears, PHARMD
• Brandon Sikes, M.S.
• Connor William Silvestri, DDS
• Brentley Jason Silvey, MD

• Adult Psychiatric/Mental Health Clinical Nurse Specialist in Fayetteville, AR
• Providers in Fayetteville, AR by specialty
• Adult Psychiatric/Mental Health Clinical Nurse Specialist in Arkansas

• 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.

Verify at the official NPI Registry.