Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. William Allan Best Sr., RPH
Pharmacist in Coatesville, PA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043319403
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mr. William Allan Best Sr.
Credential RPH
Sex Male
Practice address 1400 Blackhorse Hill Road, Pharmacy Service (119), Coatesville, PA, 19320
Phone (610) 384-7711
Fax (610) 466-2244
Enumeration date Sep 22, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy.
About the RPH 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.
Frequently asked questions
Is NPI 1043319403 active?
Yes, as of the latest NPPES snapshot, NPI 1043319403 is active (record last updated 2007-07-08).
How do I verify William Best's NPI record?
Cross-check NPI 1043319403 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Okema Scott-Thomas Clinical Social Worker · Coatesville, PA NPI 1235236753 D. Gillespie Pharmacist · Coatesville, PA NPI 1013017409 Lori Heun Speech-Language Pathologist · Coatesville, PA NPI 1871826602 Sergey Mirakov Addiction Psychiatry Physician · Coatesville, PA NPI 1629347182 Katherine Trexler Pharmacist · Coatesville, PA NPI 1205231370 Diana Zinnie Clinical Social Worker · Coatesville, PA NPI 1679046031
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.