Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Ms. Dianne S. Heynen, MS, QMHP, LPC-MH
Mental Health Counselor in Sioux Falls, SD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699856997
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 15428 | Other | - | HEALTH PARTNERS |
| 15428 | Other | - | VALUE OPTIONS |
| 49974 | Other | SD | BCBS |
| 034T7 | Other | MN | BCBS |
| 22057 | Other | SD | SIOUX VALLEY HEALTH |
| 39026 | Other | - | WAUSAU BENEFITS |
| 50374 | Other | - | TRICARE PRIME REMOTE |
| 65755 | Medicaid | SD | - |
| 9212453 | Other | SD | DAKOTACARE |
| 62413 | Other | - | UNITED BEHAVIORAL HEALTH |
| 87726 | Other | - | UNITED BEHAVIORAL HEALTH |
| 12345 | Other | - | CIGNA HEALTHCARE |
| 49974 | Other | IA | BCBS |
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.
Frequently asked questions
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.