Da Yon Park , PA-C
Physician Assistant • Fairfax, VA
3620 Joseph Siewick Dr Ste 201
Fairfax, VA 220331758
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 December 21, 2018; this date does not establish years in practice.
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Published CMS data list 1,356 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 — Established patient outpatient office visit: 273 service units.
- J1010 — Injection, methylprednisolone acetate, 1 mg: 209 service units.
- 99203 — New patient outpatient office visit: 127 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 14 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 167 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:
- Cephalexin — 67 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 51 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) — 18 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 5 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Fairfax, VA (2024, 79 clinicians with data). Median for this group: 174. Middle half: 73 to 402.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Virginia (2024, 2,247 clinicians with data). Median for this group: 288. Middle half: 107 to 693.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 215 in 2020 to 1,356 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
3620 Joseph Siewick Dr Ste 201
Fairfax, VA 220331758
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Fair Oaks Ortho, Pllc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2018
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
301 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $72,191 in 2024
The total amount Medicare approved for these services in 2024. 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, 2024.
Paid by Medicare
About $52,690 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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, 2024.
30-day fills
167 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
$714 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.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $17.91 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
8 years (graduated 2018)
CMS Doctors and Clinicians data list 2018 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2018
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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)
Da Park 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 Da Park 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 Fairfax and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Fairfax, VA (2024, 79 clinicians with data). Median for this group: 174. Middle half: 73 to 402.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Virginia (2024, 2,247 clinicians with data). Median for this group: 288. Middle half: 107 to 693.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Physician Assistant in Fairfax, VA (2024, 79 clinicians with data). Median for this group: $15,746. Middle half: $6,490 to $34,145.
A higher Medicare-allowed amount than 85% of clinicians listed under Physician Assistant in Virginia (2024, 2,247 clinicians with data). Median for this group: $23,153. Middle half: $9,003 to $44,800.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Physician Assistant in Fairfax, VA (2024, 79 clinicians with data). Median for this group: $11,256. Middle half: $4,755 to $24,970.
A higher Medicare payment amount than 85% of clinicians listed under Physician Assistant in Virginia (2024, 2,247 clinicians with data). Median for this group: $17,218. Middle half: $6,803 to $32,639.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Physician Assistant in Fairfax, VA (2024, 80 clinicians with data). Median for this group: 159. Middle half: 60 to 401.
Close to the middle for clinicians listed under Physician Assistant in Virginia (2024, 2,256 clinicians with data). Median for this group: 247. Middle half: 75 to 708.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Physician Assistant in Fairfax, VA (2024, 80 clinicians with data). Median for this group: $4,652. Middle half: $412 to $64,707.
A lower Part D drug cost than 70% of clinicians listed under Physician Assistant in Virginia (2024, 2,256 clinicians with data). Median for this group: $3,441. Middle half: $640 to $57,211.
151 active clinicians are listed under Physician Assistant with a practice address in Fairfax, VA (4,411 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Fairfax
20.5% of these 151 clinicians have the CMS telehealth indicator.
63.6% of these 151 clinicians are listed by CMS as accepting Medicare assignment.
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 increased 531% from 215 in 2020 to 1,356 in 2024.
- 2020: 215
- 2021: 221
- 2022: 1,043
- 2023: 1,146
- 2024: 1,356
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Medicare-allowed amount
Medicare-allowed amount increased 481% from $12,419 in 2020 to $72,191 in 2024.
- 2020: $12,419
- 2021: $12,231
- 2022: $68,899
- 2023: $73,156
- 2024: $72,191
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Paid by Medicare
Paid by Medicare increased 501% from $8,768 in 2020 to $52,690 in 2024.
- 2020: $8,768
- 2021: $9,305
- 2022: $53,678
- 2023: $51,604
- 2024: $52,690
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 25% from 134 in 2022 to 167 in 2024.
- 2022: 134
- 2023: 139
- 2024: 167
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30-day fills
30-day fills increased 25% from 134 in 2022 to 167 in 2024.
- 2022: 134
- 2023: 139
- 2024: 167
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Part D drug cost
Part D drug cost went from $722 in 2022 to $714 in 2024.
- 2022: $722
- 2023: $980
- 2024: $714
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $75.08 in 2021 to $17.91 in 2025.
- 2021: $75.08
- 2022: $104.94
- 2025: $17.91
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $17.91.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Physio-Stim | General | $17.91 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018–2023 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, 2019–2024; 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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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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273 | 167 | $250.00 | $84.76 |
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J1010
Injection, methylprednisolone acetate, 1 mg
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209 | 12 | $0.72 | $0.14 |
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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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127 | 127 | $300.00 | $101.77 |
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J0702
Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg
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123 | 82 | $10.73 | $6.89 |
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73140
X-ray of finger, minimum of 2 views
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115 | 75 | $171.65 | $37.27 |
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20550
Injection into tendon or ligament
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111 | 70 | $170.27 | $52.58 |
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76942
Ultrasonic guidance for needle placement
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103 | 69 | $450.00 | $55.12 |
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73110
X-ray of wrist, minimum of 3 views
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87 | 50 | $189.00 | $38.87 |
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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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52 | 46 | $350.00 | $120.15 |
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97760
Training in the use of orthopedic device for arm, leg and/or trunk, each 15 minutes
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47 | 39 | $85.00 | $43.67 |
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73130
X-ray of hand, minimum of 3 views
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36 | 24 | $134.56 | $34.39 |
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73030
X-ray of shoulder, minimum of 2 views
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31 | 27 | $150.84 | $34.04 |
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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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29 | 29 | $400.00 | $146.48 |
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20611
Aspiration and/or injection of fluid large joint using ultrasound guidance
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13 | 11 | $320.00 | $94.40 |
Source: CMS Part B by Provider and Service, 2024; 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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Cephalexin | Cephalexin | 67 | 337 | $195.20 | 61 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 51 | 160 | $220.30 | 47 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 18 | 78 | $98.42 | 16 |
| Methylprednisolone | Methylprednisolone | 16 | 96 | $143.01 | 12 |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 15 | 37 | $56.89 | 15 |
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
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20190201000510
DC
2163769936
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Fair Oaks Ortho, Pllc
1850 Town Ctr Pkwy, Reston, VA 201903204
Phone: 7036899000
Fair Oaks Ortho, Pllc
3998 Fair Ridge Dr, Fairfax, VA 220332907
Phone: 7035910077
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant (Certified)
Physical Therapist
Physical Therapist, Doctor of Physical Therapy
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Physician Assistant - Medical
Physician Assistant
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated December 21, 2018.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2019 to August 2026.
NPI Administrative Meta
Other Physician Assistants in Fairfax
- Jessica Leabo, PA-C
- Degache Fukiau
- Mallory Armstrong, PA-C
- Adetokunbo Aderemi-Ibitola, PA-C
- Soraya Yunus, PA
- Melanie Sov, PA-C
More public profiles in Virginia
Directory navigation, in NPI number order.
- Michael Kaplan, MD Radiology - Vascular & Interventional Radiology · Alexandria
- Silvia Degli Esposti, MD Internal Medicine - Gastroenterology · Newport News
- Ira Webb, PA-C Physician Assistant · Bluefield
- Katherine Tiller, MD Internal Medicine - Hospice and Palliative Medicine · Harrisonburg
- Christian Muller, MD Radiology - Diagnostic Radiology · Fairfax
- George Besch, MD Internal Medicine - Cardiovascular Disease · Alexandria
- James Shadbolt, DPM Podiatrist - Foot Surgery · Henrico
- Deborah Heimbach, NP Emergency Medicine · Falls Church
- Paul Mecherikunnel, MD Orthopaedic Surgery - Hand Surgery · Sterling
- John Bollig, MD Family Medicine · Goode
- Nicholes Dasovich, PA-C Physician Assistant - Medical · Danville
- John Dallara, MD Emergency Medicine · Danville
Mailing Address
3620 Joseph Siewick Dr Ste 201
Fairfax, VA 220331758
Phone: 7033910111