Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Douglas R Dreffer, M.D.
Family Medicine Physician in Derry, NH · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1316940802
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 01Y002400NH01 | Other | NH | ANTHEM ID# FHC |
| 222594672 | Other | NH | GREATWEST HEALTHCARE ID# |
| P00059817 | Other | NH | RAIDROAD MEDICARE ID# |
| 2139325 | Other | NH | CIGNA ID# |
| 30200816 | Medicaid | NH | - |
| NH1855 | Other | NH | HARVARD PILGRIM ID# FHC |
| 01YP02400NH01 | Other | NH | ANTHEM ID # |
| 222594672 | Other | NH | HEALTH CARE VALUE MANAGE# |
| 222594672 | Other | NH | PRIVATE HEALTH CARE ID# |
| 4126889 | Other | NH | MVP ID# |
| 01-40641 | Other | NH | UNITED HEALTHCARE ID# |
| 2500010 | Other | NH | AETNA ID# |
| NH1835 | Other | NH | HARVARD PILGRIM ID# |
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.
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-08.