Dr. Alexander Duff, DC
Dr. Alexander Duff is a Chiropractor provider (Chiropractor) practicing in Boulder, CO, registered in the NPPES registry with NPI 1205398732 since 2019. The credential DC stands for Doctor of Chiropractic.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1205398732 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Alexander Duff |
| Credential | DC |
| Sex | Male |
| Practice address | Boulder, CO, 80301 |
| Phone | 3034400500 |
| Enumeration date | 2019-04-03 |
| Last updated in NPPES | 2019-04-03 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 0007920 | CO |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Copy-ready billing details
Provider: Alexander Duff, DC NPI: 1205398732 Taxonomy: 111N00000X (Chiropractor) Address: Boulder, CO, 80301
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1396899514 | Douglas Terry | Individual | Chiropractor | Boulder, CO |
| 1073738662 | Natalie Lyle | Individual | Chiropractor | Boulder, CO |
| 1144598160 | Physical Medicine of Colorado, Pllc | Organization | General Practice Physician | Boulder, CO |
| 1518382845 | Alliance Health of Colorado | Organization | Physical Medicine & Rehabilitation Physician | Boulder, CO |
| 1043772544 | Lyle Chiropractic, Pllc | Organization | Chiropractor | Boulder, CO |
| 1093557662 | Emily Feero | Individual | Chiropractor | Boulder, CO |
Verify this record
Cross-check NPI 1205398732 against the authoritative CMS record: view Dr. Alexander Duff on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
What is the NPI number for Alexander Duff?
Where does Alexander Duff practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2019-04-03.