NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William R Haffenreffer, DC

Chiropractor in North Hampton, NH · enumerated 2007 · practices at Back To Health Chiropractic.

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

National Provider Identifier

1255480216

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. William R Haffenreffer
Credential DC
Sex Male
Practice address 18 Lafayette Rd, North Hampton, NH, 03862
Phone (603) 964-1844
Fax (603) 964-7187
Enumeration date Jan 9, 2007
Last updated in NPPES Jul 16, 2012

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 1591093R (NH) Primary
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier Type State Issuer
1255480216 Other NH HARVARD PILGRIM HEALTHCARE
5245689 Other - AETNA
0509996Y0NH01 Other NH BLUE CROSS

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 Haffenreffer?
The National Provider Identifier (NPI) for William Haffenreffer is 1255480216, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Haffenreffer practice?
The practice location on file with NPPES is in North Hampton, 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 2012-07-16.