Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Derrick A. Doolittle, M.D.

Diagnostic Radiology Physician in Sioux Falls, SD · enumerated 2011.

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

National Provider Identifier

1932494390

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Registry record

Entity type Individual (Type 1)

Name Derrick A. Doolittle

Credential M.D.

Sex Male

Practice address 1210 W 18th St Ste Ll03, Sioux Falls, SD, 57104

Phone (605) 328-1410

Enumeration date Jun 14, 2011

Last updated in NPPES Aug 29, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 6495 (NE) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 106274 (MN) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 55600 (MN) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 11534 (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.

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Frequently asked questions

What is the NPI number for Derrick Doolittle?

The National Provider Identifier (NPI) for Derrick Doolittle is 1932494390, a Type 1 (individual) record in the CMS NPPES registry.

Where does Derrick Doolittle practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-29.