David John Williams , PA-C
Physician Assistant โข Winchester, VA
1818 Amherst St Ste 101
Winchester, VA 22601
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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David Williams is listed in NPPES under Physician Assistant.
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NPI assigned on January 26, 2006; this date does not establish years in practice.
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Published CMS data list 249 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 39 service units.
- 63048 โ Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment: 37 service units.
- 22853 โ Insertion of cage or mesh device to spine bone and disc space during spine fusion: 36 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 164 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Methocarbamol โ 59 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 31 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) โ 30 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ 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 ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 84 clinicians with data). Median for this group: 365. Middle half: 116 to 848.
Close to the middle for Medicare Part B services among 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 โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 217 in 2020 to 249 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
1818 Amherst St Ste 101
Winchester, VA 22601
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in New Market, VA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: Medical Rehabilitation Systems Llc; Valley Physician Enterprise Inc. 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
2002
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
112 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 โ by Provider, 2024.
Medicare-allowed amount
About $20,084 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 โ by Provider and Service, 2024.
Paid by Medicare
About $15,274 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 โ by Provider and Service, 2024.
30-day fills
166 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
$1,377 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $136.05 across 6 records.
By nature of payment
- Food and Beverage: $136.05 across 6 records.
Reporting-company totals (3 largest of 4)
- Medtronic, Inc.: $49.50 across 2 records.
- Theragen, Inc.: $39.00 across 2 records.
- EBI, LLC: $29.08 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
24 years (graduated 2002)
CMS Doctors and Clinicians data list 2002 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
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.
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, โDoes your provider accept Medicare as full payment?โ
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)
David Williams 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 David Williams 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 Winchester and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 84 clinicians with data). Median for this group: 365. Middle half: 116 to 848.
Close to the middle for 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 lower Medicare-allowed amount than 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 84 clinicians with data). Median for this group: $29,009. Middle half: $12,231 to $56,353.
Close to the middle for 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 lower Medicare payment amount than 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 84 clinicians with data). Median for this group: $21,928. Middle half: $9,190 to $38,454.
Close to the middle for 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
Fewer Part D prescriptions than 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 88 clinicians with data). Median for this group: 328. Middle half: 92 to 756.
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 60% of clinicians listed under Physician Assistant in Winchester, VA (2024, 88 clinicians with data). Median for this group: $4,201. Middle half: $790 to $70,596.
A lower Part D drug cost than 60% 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.
217 active clinicians are listed under Physician Assistant with a practice address in Winchester, VA (4,411 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Winchester
10.6% of these 217 clinicians have the CMS telehealth indicator.
53% of these 217 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 15% from 217 in 2020 to 249 in 2024.
- 2020: 217
- 2021: 165
- 2022: 248
- 2023: 58
- 2024: 249
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Medicare-allowed amount
Medicare-allowed amount increased 34% from $15,000 in 2020 to $20,084 in 2024.
- 2020: $15,000
- 2021: $7,977
- 2022: $27,702
- 2023: $6,331
- 2024: $20,084
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Paid by Medicare
Paid by Medicare increased 39% from $10,979 in 2020 to $15,274 in 2024.
- 2020: $10,979
- 2021: $5,598
- 2022: $21,978
- 2023: $4,979
- 2024: $15,274
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 177 in 2020 and 164 in 2024.
- 2020: 177
- 2021: 154
- 2022: 45
- 2023: 29
- 2024: 164
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30-day fills
30-day fills varied from year to year: 180 in 2020 and 166 in 2024.
- 2020: 180
- 2021: 155
- 2022: 45
- 2023: 29
- 2024: 166
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Part D drug cost
Part D drug cost decreased 30% from $1,970 in 2020 to $1,377 in 2024.
- 2020: $1,970
- 2021: $1,517
- 2022: $268
- 2023: $444
- 2024: $1,377
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $93.15 in 2021 to $136.05 in 2025.
- 2021: $93.15
- 2025: $136.05
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 ยท 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 โ December 31, 2025): fewer than 11 records totaling $136.05.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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MAZOR X SYSTEM | General | $30.81 |
| EBI, LLC |
Food and Beverage
In-kind items and services
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BIOMET SPINALPAK NON-INVASIVE SPINE FUSION STIMULATOR SYSTEM | General | $29.08 |
| Theragen, Inc. |
Food and Beverage
In-kind items and services
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ActaStim-S | General | $20.00 |
| Theragen, Inc. |
Food and Beverage
In-kind items and services
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ActaStim-S | General | $19.00 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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INCEPTIV | General | $18.69 |
| Orthofix Medical, Inc. |
Food and Beverage
Cash or cash equivalent
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Spinal-Stim | General | $18.47 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018โ2023 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 โ by Provider and Service data, 2019โ2024; 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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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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39 | 34 | $353.00 | $106.26 |
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63048
Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment
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37 | 17 | $115.40 | $25.75 |
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22853
Insertion of cage or mesh device to spine bone and disc space during spine fusion
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36 | 26 | $141.20 | $32.15 |
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22614
Fusion of additional segment of spine
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33 | 12 | $214.00 | $47.54 |
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63047
Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment
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24 | 24 | $610.60 | $105.13 |
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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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20 | 20 | $460.00 | $133.06 |
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22633
Fusion of spine in lower back with partial removal of spine bone and disc
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17 | 17 | $1019.80 | $235.29 |
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63052
Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back
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16 | 16 | $131.80 | $33.08 |
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22842
Placement of stabilizing device to back, 3-6 spine bone segments
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15 | 15 | $417.60 | $92.22 |
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22840
Placement of stabilizing device to back of 1 spine bone in neck
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12 | 12 | $415.40 | $96.97 |
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 |
|---|---|---|---|---|---|
| Methocarbamol | Methocarbamol | 59 | 1,657 | $882.81 | 44 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 31 | 206 | $211.72 | 25 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 30 | 195 | $117.03 | 23 |
| Oxycodone Hcl | Oxycodone Hcl | 29 | 195 | $142.45 | 24 |
| Hydromorphone Hcl | Hydromorphone Hcl | 15 | 46 | $22.67 | 14 |
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: 2025-04-08NUCC 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
I20191115001001
VA
2961569066
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
Valley Physician Enterprise Inc
1830 Amherst St, Winchester, VA 226012808
Phone: 5406671828
Valley Physician Enterprise Inc
1000 N Shenandoah Ave, Front Royal, VA 226303547
Phone: 5406360300
Valley Physician Enterprise Inc
1840 Amherst St, Winchester, VA 226012808
Phone: 5405368000
Valley Physician Enterprise Inc
1880 Amherst St, Winchester, VA 226012808
Valley Physician Enterprise Inc
1860 Amherst St, Winchester, VA 226012808
Phone: 5405368000
Medical Rehabilitation Systems Llc
12580 National Pike, Grantsville, MD 215363310
Phone: 3018955793
Secondary Practice Locations
9166 N Congress St
New Market, VA 228449422
Phone: 5404591340
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Nurse Practitioner
Neurological Surgery
Doctor of Medicine (M.D.)
Neurological Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Nurse Practitioner
Nurse Practitioner
Licensed Practical Nurse
Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1818 AMHERST ST STE 101, WINCHESTER, VA 22601 (Tel: 5404500072)
Registered at 220 CAMPUS BLVD STE 100, WINCHESTER, VA 226012888 (Tel: 5405365100)
Physician Assistant (license number reported to NPPES: VA 0110005510)
NPI status registered as active in NPPES database
Registered at 4881 SUGAR MAPLE DR, WPAFB, OH 454335546 (Tel: 9372570770)
Registered at 4881 SUGAR MAPLE DR, WPAFB, OH 454335546 (Tel: 9372570770)
Recorded as DAVID WILLIAMS, PA-C
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Winchester
- Walina Muhsiny, PA
- Philip Hood, PA
- Laura Minster
- Michael Lapp, PA
- Robin Fisher, PA-C
- Nicholas Seward, PA-C
Mailing Address
220 Campus Blvd Ste 100
Winchester, VA 226012888
Phone: 5405365100