Active NPI 1952374290 Individual Practitioner Male Practitioner

Dr. Gregory P Duff , MD

Orthopaedic Surgery • Silverdale, WA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Duff, MD is a certified Orthopaedic Surgery practicing in Silverdale, WA. With approximately 34 years of clinical experience since graduating from Harvard Medical School in 1992, Dr. Duff delivers high-quality medical care to the local community at 4409 NW ANDERSON HILL RD.

Dr. Duff is affiliated with Franciscan Medical Group and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient outpatient office visit, x-ray of shoulder, minimum of 2 views. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

4409 Nw Anderson Hill Rd

Silverdale, WA 983836807

Telephone 3606986630

Fax 3608256536

Associated Practice Facility / Clinic

🏢 Westsound Orthopaedics, Ps Facility NPI 1104923655

Medicare Profile & Education

Medical School

Harvard Medical School

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Orthopaedic Surgery in Silverdale, WA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

34 Yrs +8.7 yrs vs City Avg

City Avg: 25.3 Yrs

State Avg: 23.2 Yrs

Regional Practice Density

10 Specialists

Practicing in Silverdale, WA (707 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

66.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Duff (34 Years) 34 Yrs

Silverdale Specialty Average (25.3 Years) 25.3 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	348	67	$4.00	$0.97
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	213	135	$371.27	$127.80
73030 X-ray of shoulder, minimum of 2 views	144	116	$102.13	$35.36
99213 Established patient office or other outpatient visit, typically 15 minutes	76	60	$262.17	$89.39
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	71	59	$291.00	$99.28
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	67	54	$520.78	$179.53
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	61	61	$485.28	$166.39
73564 X-ray of knee, 4 or more views	25	20	$137.68	$48.07
23472 Prosthetic repair of shoulder joint, total shoulder	25	23	$4202.44	$1416.92
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	14	14	$640.14	$218.23
73080 X-ray of elbow, minimum of 3 views	13	13	$96.31	$33.31
73502 X-ray of hip, 2-3 views	11	11	$138.64	$48.10

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	241	52	$4.80	$1.07
73030 X-ray of shoulder, minimum of 2 views	155	114	$99.12	$34.86
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	127	98	$366.24	$127.16
99213 Established patient office or other outpatient visit, typically 15 minutes	123	90	$259.59	$89.94
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	44	40	$514.95	$178.12
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$478.18	$165.47
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	41	36	$289.44	$98.85
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	27	27	$321.93	$111.46
73564 X-ray of knee, 4 or more views	24	22	$134.83	$47.68
73110 X-ray of wrist, minimum of 3 views	24	15	$119.71	$41.85
23472 Prosthetic repair of shoulder joint, total shoulder	17	17	$4167.71	$1425.10
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	12	12	$630.67	$218.24
20610 Aspiration and/or injection of fluid from large joint	11	11	$187.45	$64.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	196	40	$6.00	$1.14
99213 Established patient office or other outpatient visit, typically 15 minutes	175	112	$258.45	$90.57
73030 X-ray of shoulder, minimum of 2 views	107	82	$97.58	$35.31
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	58	50	$364.40	$128.07
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	45	38	$284.22	$100.67
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	41	41	$318.24	$111.11
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	21	21	$65.38	$23.44
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$475.12	$166.53
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	13	13	$512.46	$180.51
23472 Prosthetic repair of shoulder joint, total shoulder	13	13	$4142.69	$1441.37

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	196	123	$205.00	$90.77
73030 X-ray of shoulder, minimum of 2 views	116	86	$91.24	$34.16
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	56	14	$6.00	$1.20
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	51	51	$294.00	$113.15
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	45	38	$297.00	$124.36
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	34	31	$263.82	$102.14
J1030 Injection, methylprednisolone acetate, 40 mg	32	27	$17.00	$5.73
23472 Prosthetic repair of shoulder joint, total shoulder	16	16	$4073.00	$1458.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$450.00	$159.78
73562 X-ray of knee, 3 views	12	12	$107.00	$41.47
20610 Aspiration and/or injection of fluid from large joint	12	11	$172.00	$64.91

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	260	156	$204.04	$75.74
73030 X-ray of shoulder, minimum of 2 views	119	94	$89.15	$33.59
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	58	58	$292.03	$108.68
J1030 Injection, methylprednisolone acetate, 40 mg	53	46	$17.70	$6.08
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	34	32	$256.12	$96.07
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	32	30	$297.00	$106.65
73562 X-ray of knee, 3 views	15	15	$104.67	$39.79
23430 Anchoring of biceps tendon	13	13	$2041.31	$525.58
23472 Prosthetic repair of shoulder joint, total shoulder	12	12	$4071.33	$1486.82

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	202	125	$201.47	$74.74
73030 X-ray of shoulder, minimum of 2 views	98	75	$83.94	$29.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	58	51	$296.28	$106.67
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	46	46	$292.15	$108.93
J1030 Injection, methylprednisolone acetate, 40 mg	45	35	$18.56	$6.31
20610 Aspiration and/or injection of fluid from large joint	23	21	$166.48	$60.92
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	16	13	$236.00	$93.10
73562 X-ray of knee, 3 views	15	14	$104.87	$37.75
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	15	$554.07	$202.95
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$450.43	$165.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	193	113	$200.00	$72.71
73030 X-ray of shoulder, minimum of 2 views	79	60	$83.47	$29.59
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	39	36	$294.41	$107.90
J1030 Injection, methylprednisolone acetate, 40 mg	39	33	$17.26	$6.50
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	32	32	$296.00	$108.14
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	20	17	$230.00	$86.82
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$450.50	$164.70
20610 Aspiration and/or injection of fluid from large joint	14	14	$167.00	$60.83
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	11	11	$556.45	$202.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	176	107	$198.28	$72.52
73030 X-ray of shoulder, minimum of 2 views	73	59	$79.36	$28.52
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	45	39	$292.13	$104.81
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	43	43	$284.33	$104.67
J1030 Injection, methylprednisolone acetate, 40 mg	31	26	$12.29	$5.63
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	20	17	$230.00	$90.32
73562 X-ray of knee, 3 views	16	12	$97.63	$35.82
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$553.71	$199.89
73502 X-ray of hip, 2-3 views	14	11	$113.29	$37.22

Medical Specialties & State Licenses

CMS Verified: 2020-12-02

Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

State License WA MD00034439

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

Medicaid State Provider ID

1105137 (WA)

Medicaid State Provider ID

1023009 (WA)

Commercial Insurance / Payer ID Labor And Industries

0199377 (WA)

Hospital & Practice Group Affiliations

Franciscan Medical Group

4409 Nw Anderson Hill Rd, Silverdale, WA 983836807

Phone: 3606986630

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

38 Associated Practitioners

Mimi Malgarini , PT

Physical Therapist

NPI 1013962208

Physical Therapist

Dr. Omar Abdul-Hadi , MD

Orthopaedic Surgery - Orthopaedic Surgery of the Spine

NPI 1073715546

Doctor of Medicine (M.D.)

Kristin Groessl , PA-C

Physician Assistant - Surgical

NPI 1093797250

Physician Assistant (Certified)

Dr. Michael Miller , MD

Orthopaedic Surgery

NPI 1164419685

Doctor of Medicine (M.D.)

Dr. Kenneth Koskella , MD

Orthopaedic Surgery

NPI 1164495495

Doctor of Medicine (M.D.)

Selina Mcdonald , PA-C

Physician Assistant

NPI 1184393456

Physician Assistant (Certified)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active December 13, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location December 13, 2007

Registered at 4409 NW ANDERSON HILL RD, SILVERDALE, WA 983836807 (Tel: 3606986630)

📍

Updated Business Mailing Address December 13, 2007

Registered at 4409 NW ANDERSON HILL RD, SILVERDALE, WA 983836807 (Tel: 3606986630)

👤

Provider Name / Credentials Updated December 13, 2007

Recorded as GREGORY DUFF, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 13, 2007

Orthopaedic Surgery (License #MD00034439 in WA)

🟢

Initial NPI Registration & Enumeration February 08, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1952374290

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: February 08, 2006

Last Update: December 02, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

4409 Nw Anderson Hill Rd

Silverdale, WA 983836807

Phone: 3606986630

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.