Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Grant Schultheis, MD

Ophthalmology Physician in Sioux Falls, SD · enumerated 2022.

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

National Provider Identifier

1649920729

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Registry record

Entity type Individual (Type 1)

Name William Grant Schultheis

Credential MD

Sex Male

Practice address 3101 W 57th St, Sioux Falls, SD, 57108

Phone (605) 361-3937

Fax (605) 371-7199

Enumeration date Mar 24, 2022

Last updated in NPPES Jul 9, 2026

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 18673 (SD) Primary

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

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does William Schultheis practice?

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

What is the NPI number for William Schultheis?

The National Provider Identifier (NPI) for William Schultheis is 1649920729, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-09.