Dr. Gregory John Duncan , MD
Orthopaedic Surgery • Wrangell, AK
Zimovia Highway Mile 5.5
Wrangell, AK 999299992
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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Dr. Gregory Duncan is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on June 27, 2006; this date does not establish years in practice.
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Published CMS data list 1,645 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- J3301 — Injection, triamcinolone acetonide, not otherwise specified, 10 mg: 808 service units.
- 20610 — Aspiration and/or injection of fluid from large joint: 258 service units.
- 99213 — Established patient outpatient office visit: 252 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See all 12 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 33 Medicare Part D prescriptions, including refills, in 2019.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2019. Published rows only; this is not a quality measure.
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Published Part D records, 2019:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 18 prescription fills, including refills.
- Cephalexin — 15 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2019. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 4,992 in 2017 to 1,645 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2020.
Practice Location & Contact Primary Location
Zimovia Highway Mile 5.5
Wrangell, AK 999299992
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $66,766 in 2020
The total amount Medicare approved for these services in 2020. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
Paid by Medicare
About $41,734 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
30-day fills
33 standardized 30-day fills in 2019
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
$186 in 2019
The total cost of these prescriptions in 2019, 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, 2019.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2006
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.
Enrolled in Medicare (PECOS)
Dr. Duncan has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Duncan as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Wrangell and Alaska
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Duncan are from 2020.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Duncan are from 2019.
1 active clinicians are listed under Orthopaedic Surgery with a practice address in Wrangell, AK (83 in Alaska).
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 B services
Medicare Part B services decreased 67% from 4,992 in 2017 to 1,645 in 2020.
- 2017: 4,992
- 2018: 4,692
- 2019: 4,767
- 2020: 1,645
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Medicare-allowed amount
Medicare-allowed amount decreased 76% from $274,059 in 2017 to $66,766 in 2020.
- 2017: $274,059
- 2018: $197,307
- 2019: $265,054
- 2020: $66,766
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Paid by Medicare
Paid by Medicare decreased 79% from $202,162 in 2017 to $41,734 in 2020.
- 2017: $202,162
- 2018: $138,655
- 2019: $194,335
- 2020: $41,734
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 64% from 91 in 2015 to 33 in 2019.
- 2015: 91
- 2016: 46
- 2017: 65
- 2018: 18
- 2019: 33
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30-day fills
30-day fills decreased 67% from 99 in 2015 to 33 in 2019.
- 2015: 99
- 2016: 47
- 2017: 73
- 2018: 18
- 2019: 33
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Part D drug cost
Part D drug cost went from $854 in 2015 to $186 in 2019.
- 2015: $854
- 2016: $445
- 2017: $6,601
- 2018: $150
- 2019: $186
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2019), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2019 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2020; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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808 | 148 | $10.00 | $1.53 |
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20610
Aspiration and/or injection of fluid from large joint
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258 | 142 | $66.57 | $58.68 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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252 | 183 | $78.61 | $75.43 |
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J7324
Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose
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103 | 32 | $210.00 | $136.94 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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63 | 54 | $113.73 | $109.35 |
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20605
Aspiration and/or injection of fluid from medium joint
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39 | 30 | $54.32 | $46.02 |
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73562
X-ray of knee, 3 views
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28 | 24 | $43.33 | $40.05 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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25 | 25 | $170.87 | $163.97 |
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20600
Aspiration and/or injection of fluid from small joint
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20 | 17 | $52.92 | $35.62 |
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73130
X-ray of hand, minimum of 3 views
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20 | 17 | $37.21 | $35.61 |
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73030
X-ray of shoulder, minimum of 2 views
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16 | 15 | $38.43 | $33.31 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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13 | 13 | $113.32 | $108.88 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2019.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 18 | 72 | $148.37 | 18 |
| Cephalexin | Cephalexin | 15 | 47 | $37.90 | 14 |
Source: CMS Part D by Provider and Drug, 2019; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-02-02NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20041122000637
CA
9133018690
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at ZIMOVIA HIGHWAY MILE 5.5, WRANGELL, AK 999299992 (Tel: 7079519203)
Registered at PO BOX 392, WRANGELL, AK 999290392 (Tel: 7079519203)
NPI status registered as active in NPPES database
Registered at 1200 MARSHALL ST, CRESCENT CITY, CA 955312217 (Tel: 7074651126)
Registered at 1200 MARSHALL ST, CRESCENT CITY, CA 955312217 (Tel: 7074651126)
Recorded as GREGORY DUNCAN, M.D.
Orthopaedic Surgery (license number reported to NPPES: CA A44032)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
Po Box 392
Wrangell, AK 999290392
Phone: 7079519203