Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Greentree Psychological Services, P.C.

Clinical Psychologist in Yankton, SD · enumerated 2007 · authorized official Elizabether Spivey, Clinical Psychologist.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1992901839

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Registry record

Entity type Organization (Type 2)

Legal business name Greentree Psychological Services, P.C.

Practice address 121 W 3rd St, Suite 203, Yankton, SD, 57078

Phone (605) 668-2222

Fax (605) 668-2222

Enumeration date Jun 26, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 260 (SD) Primary

Authorized official

Name Elizabether Spivey

Title Clinical Psychologist

Phone (605) 668-2222

Other identifiers

Identifier	Type	State	Issuer
6551922	Medicaid	SD	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Where is Greentree Psychological Services, P.C. located?

The practice location on file with NPPES is in Yankton, SD.

Providers at this address

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Elizabeth Spivey Clinical Psychologist · Yankton, SD NPI 1538101043

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.