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Dr. Casey Benjamin Williams, PHARM.D., BCOP

Dr. Casey Benjamin Williams is a Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist provider (Pharmacist) practicing in Sioux Falls, SD, registered in the NPPES registry with NPI 1639172349 since 2005. The credential PHARMD stands for Doctor of Pharmacy.

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NPI 1639172349
Entity type Individual (Type 1)
Name Dr. Casey Benjamin Williams
Credential PHARM.D., BCOP
Sex Male
Practice address 1000 E 23RD ST, SUITE 200, Sioux Falls, SD, 57105
Phone 6053223588
Fax 6053226901
Enumeration date 2005-05-27
Last updated in NPPES 2016-09-02

Taxonomy & licenses

Taxonomy code Specialty Primary License State
1835P0018X Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist Primary R5920 SD
1835P0018X Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist Secondary RPH5472 ND
1835P1200X Pharmacotherapy Pharmacist Secondary 1-13848 KS
1835P1200X Pharmacotherapy Pharmacist Secondary 15481 NC
1835X0200X Oncology Pharmacist Secondary 15481 NC
1835X0200X Oncology Pharmacist Secondary 1-13848 KS

PHARMD — Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD credential

Copy-ready billing details
Provider: Casey Williams, PHARM.D., BCOP
NPI: 1639172349
Taxonomy: 1835P0018X (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
Address: 1000 E 23RD ST, SUITE 200, Sioux Falls, SD, 57105

Other providers at this practice address

NPI Name Type Specialty Location
1760484570 James Simon Individual Radiation Oncology Physician Sioux Falls, SD
1124017256 Michael Mchale Individual Hematology & Oncology Physician Sioux Falls, SD
1598755001 Sally Williams Individual Family Medicine Physician Sioux Falls, SD
1992771760 Melissa Hoogeveen Individual Nurse Practitioner Sioux Falls, SD
1750357299 Mark Huber Individual Hematology & Oncology Physician Sioux Falls, SD
1467428995 David Elson Individual Medical Oncology Physician Sioux Falls, SD
1063488310 Kristen Hurley Individual Family Nurse Practitioner Sioux Falls, SD
1295701522 Kelly Mccaul Individual Hematology & Oncology Physician Sioux Falls, SD

Verify this record

Cross-check NPI 1639172349 against the authoritative CMS record: view Dr. Casey Benjamin Williams on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Is NPI 1639172349 active?
Yes — as of the latest NPPES snapshot, NPI 1639172349 is active (record last updated 2016-09-02).
How do I verify Casey Williams's NPI record?
Cross-check NPI 1639172349 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-09-02.