Gregory Duncan, ND
NPI 1700289626 · Primary Care Clinic/Center · Medford, OR
Gregory Duncan, ND is a Primary Care Clinic/Center provider in Medford, OR (NPI 1700289626).
Provider details
- NPI number
- 1700289626
- Entity type
- Individual
- Primary specialty
- Primary Care Clinic/CenterAmbulatory Health Care Facilities
- Credential
- ND
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2046 (OR)
Specialties & taxonomies
Ambulatory Health Care Facilities
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Liothyronine Sodium | 30 | — |
| Testosterone Cypionate | 30 | 15 |
| Amlodipine Besylate | 25 | — |
| Lorazepam | 24 | — |
| Levothyroxine Sodium | 24 | — |
| Lisinopril | 24 | — |
| Oxycodone Hcl | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-10-06
- Last updated
- 2021-01-04
- Certified
- 2021-01-04
Frequently asked questions
- What is Gregory Duncan's NPI number?
- Gregory Duncan's National Provider Identifier (NPI) is 1700289626, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Duncan's specialty?
- Gregory Duncan is listed in the NPPES registry with a primary specialty of Primary Care Clinic/Center (Ambulatory Health Care Facilities).
- Where is Gregory Duncan located?
- Gregory Duncan's practice location on file with NPPES is 940 Ellendale Dr, Medford, OR 97504-8216.
- What is Gregory Duncan's phone number?
- The practice phone number listed in the NPPES registry for Gregory Duncan is (541) 210-5687.
- Is Gregory Duncan's NPI active?
- Yes — Gregory Duncan's NPI (1700289626) is active in the NPPES registry as of the last update on 2021-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.