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Edit this profileAt a glance
- 4409 Nw Anderson Hill Rd, Silverdale, WA 98383
About Dr. Duff
Gregory P. Duff, M.D. is a healthcare provider in Silverdale, WA specializing in orthopedic surgery. Gregory trained at Harvard Medical School, graduating in 1992. Gregory is also listed as specializing in orthopaedic surgery. According to Medicare claims data, Gregory cared for 633 Medicare patients across 1,068 services. The services billed most often include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and x-ray of shoulder, minimum of 2 views. This provider record is associated with NPI 1952374290.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (360) 698-6630
- Email not available
Practice Locations
4409 NW ANDERSON HILL RD
Silverdale, WA 98383
Conditions Commonly Evaluated or Treated
Within Orthopedic Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Elbow, hand, and wrist
Foot and ankle
Hip
Shoulder
Sports and soft tissue
Trauma and bone
Foot & Ankle
Spine
Procedures & services
Most searched procedures
Evaluation and nonsurgical
Arthroscopy
Foot & Ankle
Foot and ankle
Hand & Wrist
Hand and upper extremity
Injections & Non-Surgical
Injections & pain relief
Joint replacement
- Partial knee replacement
- Reverse shoulder replacement
- Revision joint replacement
- Shoulder replacement
Knee
Shoulder surgery
Trauma & Fractures
Trauma and fixation
Procedures Most Often Billed to Medicare
1,068 services · 633 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid large joint using ultrasound guidance | Procedure | 20611 |
71 | As often as other peers in Orthopedic Surgery |
| Prosthetic repair of shoulder joint, total shoulder | Procedure | 23472 |
25 | As often as other peers in Orthopedic Surgery |
| X-ray of shoulder, minimum of 2 views | Imaging | 73030 |
144 | More often than most peers in Orthopedic Surgery |
| X-ray of knee, 4 or more views | Imaging | 73564 |
25 | Less often than most peers in Orthopedic Surgery |
| X-ray of elbow, minimum of 3 views | Imaging | 73080 |
13 | Less often than most peers in Orthopedic Surgery |
| X-ray of hip, 2-3 views | Imaging | 73502 |
11 | Less often than most peers in Orthopedic Surgery |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
348 | As often as other peers in Orthopedic Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
213 | More often than most peers in Orthopedic Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
76 | Less often than most peers in Orthopedic Surgery |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
67 | More often than most peers in Orthopedic Surgery |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other orthopedic surgeons at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other orthopedic surgeons in Silverdale 3
Same specialty, same city.
Trained at Harvard Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid large joint using ultrasound guidance 8
Providers in WA who bill this service to Medicare most often.
Common questions
What is Gregory P. Duff's specialty?
Gregory P. Duff is an orthopedic surgeon in Silverdale, WA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Orthopedic Surgery”.
NPI registry
Where can I find Gregory P. Duff?
Gregory P. Duff is listed at 4409 Nw Anderson Hill Rd, Silverdale, WA 98383. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gregory P. Duff?
The number on file is (360) 698-6630. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Gregory P. Duff's NPI number?
Gregory P. Duff's National Provider Identifier is 1952374290. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Gregory P. Duff's education?
Gregory P. Duff attended Harvard Medical School, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How long has Gregory P. Duff been practicing?
Gregory P. Duff has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What is Gregory P. Duff known for?
According to Medicare billing data, Gregory P. Duff performs procedures including aspiration and/or injection of fluid large joint using ultrasound guidance and prosthetic repair of shoulder joint, total shoulder; reads or performs imaging such as x-ray of shoulder, minimum of 2 views and x-ray of knee, 4 or more views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gregory P. Duff confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory P. Duff. If this is you, claiming it is free.
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