Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Backus, PHARM D
Pharmacist in Newmarket, NH · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417275447
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Registry record
Entity type Individual (Type 1)
Name Dr. William Backus
Credential PHARM D
Sex Male
Practice address 73 Exeter Rd, Newmarket, NH, 03857
Phone (603) 659-7852
Enumeration date May 14, 2010
Last updated in NPPES May 14, 2010
Taxonomy & licenses
PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy.
About the PHARMD 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
Where does William Backus practice?
The practice location on file with NPPES is in Newmarket, NH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Backus?
The National Provider Identifier (NPI) for William Backus is 1417275447, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-14.