Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Carol M Mehlhaff, PHD

Psychologist in Yankton, SD · enumerated 2005.

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

National Provider Identifier

1972598993

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Registry record

Entity type Individual (Type 1)

Name Dr. Carol M Mehlhaff

Credential PHD

Sex Female

Practice address Yankton, SD, 57078

Phone (605) 520-0477

Enumeration date Sep 15, 2005

Last updated in NPPES Aug 3, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 835 (IA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 405 (SD) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
4994144	Other	SD	WELLMARK
21182	Other	SD	SIOUX VALLEY HEALTH PLAN
90041850	Other	SD	UNITED HEALTH CARE
P405	Other	SD	DAKOTACARE
6552250	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

Where does Carol Mehlhaff practice?

The practice location on file with NPPES is in Yankton, SD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Carol Mehlhaff?

The National Provider Identifier (NPI) for Carol Mehlhaff is 1972598993, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-03.