Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Christopher Callahan, RPH

Pharmacist in Manchester, NH · enumerated 2006.

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

National Provider Identifier

1225133192

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name William Christopher Callahan

Credential RPH

Sex Male

Practice address 718 Smyth Rd, Manchester, NH, 03104

Phone (603) 624-4366

Fax (603) 626-6562

Enumeration date Sep 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 16036 (MA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Callahan?

The National Provider Identifier (NPI) for William Callahan is 1225133192, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Callahan practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.