Dr. Gregory Mcclane Duncan , ND
Naturopath • Medford, OR
940 Ellendale Dr, Ste 102
Medford, OR 975048216
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on October 6, 2014; this date does not establish years in practice.
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Published CMS data list 431 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Testosterone Cypionate — 30 prescription fills, including refills.
- Liothyronine Sodium — 30 prescription fills, including refills.
- Amlodipine Besylate — 25 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 21 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 90% of clinicians listed under Naturopath in Oregon (2024, 263 clinicians with data). Median for this group: 49. Middle half: 19 to 115.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 161 in 2020 to 431 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
940 Ellendale Dr
Ste 102
Medford, OR 975048216
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Naturopath: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
728 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$7,298 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
NPI first issued
2014
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Medford and Oregon
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Naturopath in Oregon (2024, 263 clinicians with data). Median for this group: 49. Middle half: 19 to 115.
Too few clinicians listed under Naturopath in Medford have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Naturopath in Oregon (2024, 263 clinicians with data). Median for this group: $1,415. Middle half: $400 to $4,143.
Too few clinicians listed under Naturopath in Medford have Medicare Part D data for 2024 to compare.
9 active clinicians are listed under Naturopath with a practice address in Medford, OR (1,182 in Oregon).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 168% from 161 in 2020 to 431 in 2024.
- 2020: 161
- 2021: 247
- 2022: 281
- 2023: 402
- 2024: 431
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30-day fills
30-day fills increased 172% from 268 in 2020 to 728 in 2024.
- 2020: 268
- 2021: 363
- 2022: 457
- 2023: 601
- 2024: 728
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Part D drug cost
Part D drug cost decreased 40% from $12,218 in 2020 to $7,298 in 2024.
- 2020: $12,218
- 2021: $6,065
- 2022: $5,928
- 2023: $9,400
- 2024: $7,298
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Testosterone Cypionate | Testosterone Cypionate | 30 | 1,260 | $2,230.22 | 15 |
| Liothyronine Sodium | Liothyronine Sodium | 30 | 1,715 | $938.83 | — |
| Amlodipine Besylate | Amlodipine Besylate | 25 | 1,320 | $64.24 | — |
| Lisinopril | Lisinopril | 24 | 1,920 | $125.45 | — |
| Levothyroxine Sodium | Levothyroxine Sodium | 24 | 1,845 | $139.18 | — |
| Lorazepam | Lorazepam | 24 | 692 | $73.16 | — |
| Oxycodone Hcl | Oxycodone Hcl | 24 | 531 | $678.76 | — |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 23 | 518 | $141.51 | 12 |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 23 | 1,170 | $680.82 | — |
| Tamsulosin Hcl | Tamsulosin Hcl | 22 | 1,455 | $358.23 | — |
| Metformin Hcl | Metformin Hcl | 21 | 1,080 | $135.47 | — |
| Progesterone | Progesterone, Micronized | 20 | 1,050 | $465.60 | — |
| Alprazolam | Alprazolam | 19 | 570 | $131.23 | — |
| Doxycycline Hyclate | Doxycycline Hyclate | 18 | 530 | $223.00 | — |
| Hydrocortisone | Hydrocortisone | 18 | 810 | $139.67 | — |
| Losartan Potassium | Losartan Potassium | 17 | 1,260 | $125.69 | — |
| Meloxicam | Meloxicam | 16 | 750 | $114.42 | — |
| Anastrozole | Anastrozole | 15 | 978 | $69.55 | — |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 14 | 369 | $221.65 | — |
| Prednisone | Prednisone | 13 | 450 | $110.66 | — |
| Propranolol Hcl | Propranolol Hcl | 11 | 654 | $130.30 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-01-04NUCC Taxonomy Code: 261QP2300X
NUCC Taxonomy Code: 175F00000X
Diagnoses, treats, and cares for patients, using system of practice that bases treatment of physiological functions and abnormal conditions on natural laws governing human body: Utilizes physiological, psychological, and mechanical methods, such as air, water, light, heat, earth, phototherapy, food and herb therapy, psychotherapy, electrotherapy, physiotherapy, minor and orificial surgery, mechanotherapy, naturopathic corrections and manipulation, and natural methods or modalities, together with natural medicines, natural processed foods, and herbs and nature's remedies. Excludes major surgery, therapeutic use of x ray and radium, and use of drugs, except those assimilable substances containing elements or compounds which are components of body tissues and are physiologically compatible to body processes for maintenance of life.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist
Doctor of Dental Surgery
Dentist - General Practice
Doctor of Dental Surgery
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 940 ELLENDALE DR, STE 102, MEDFORD, OR 975048216 (Tel: 5412105687)
Registered at 940 ELLENDALE DR, STE 102, MEDFORD, OR 975048216 (Tel: 5412105687)
Clinic/Center (license number reported to NPPES: OR 2046)
NPI status registered as active in NPPES database
Registered at 1840 E BARNETT RD STE B, MEDFORD, OR 975048293 (Tel: 5412105687)
Registered at 1840 E BARNETT RD STE B, MEDFORD, OR 975048293 (Tel: 5412105687)
Recorded as GREGORY DUNCAN, ND
Naturopath (license number reported to NPPES: OR 2046)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Naturopaths in Medford
Healthcare providers in MedfordMailing Address
940 Ellendale Dr, Ste 102
Medford, OR 975048216
Phone: 5412105687