NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marcus Still

Pharmacist in Siloam Springs, AR · enumerated 2020.

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

National Provider Identifier

1326648296

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marcus Still
Sex Male
Practice address 2901 Highway 412 E, Siloam Springs, AR, 72761
Phone (479) 524-3156
Enumeration date Oct 29, 2020
Last updated in NPPES Oct 29, 2020

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License PD12313 (AR) Primary

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

What specialty is Marcus Still?
Marcus Still is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-29.