Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Annette Lee Siewert, M.D.

Obstetrics & Gynecology Physician in Sioux Falls, SD · enumerated 2008.

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

National Provider Identifier

1376716647

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Registry record

Entity type Individual (Type 1)

Name Dr. Annette Lee Siewert

Credential M.D.

Sex Female

Practice address 1417 S Cliff Ave, Ste. 401, Sioux Falls, SD, 57105

Phone (605) 322-8920

Enumeration date Apr 8, 2008

Last updated in NPPES Oct 10, 2018

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 8442 (SD) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
6201780	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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Annette Siewert?

Annette Siewert is registered in NPPES with the primary taxonomy of Obstetrics & Gynecology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-10.