2026 NPPES data Foot & Ankle Surgery Podiatrist NPI 1083608814 DPM
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WILLIAM KNUDSON, DPM

Foot & Ankle Surgery Podiatrist in LEESBURG, Virginia. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
482
Medicare Part D claims · 194 beneficiaries · Foot & Ankle Surgery Podiatrist avg: 309
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
▼ 8 pts below national avg 83.1 · [object Object]
Industry payments
$579.76
33 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: WILLIAM KNUDSON, DPM is a Foot & Ankle Surgery Podiatrist ([object Object]) practicing in LEESBURG, Virginia with a Medicare Part D prescribing footprint of 482 claims across 194 beneficiaries — 3% brand-name prescribing . Their CMS MIPS Final Score of 75/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $579.76 across 33 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: WILLIAM KNUDSON, DPM reported a CMS MIPS final score of 75 out of 100, below the 83.1 national average, and filed 482 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

WILLIAM KNUDSON, DPM at a glance

Below national average

NPI registry status

Active

Issued 09/08/2005

NPI 1083608814

Primary specialty

Foot & Ankle Surgery Podiatrist

Mid-sized

8,920 US NPIs in this specialty

Medicare Part D claims

482 56% vs specialty avg

2023 prescription claims

Specialty avg: 309

MIPS final score

75/100 8.099999999999994% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Virginia

How Foot & Ankle Surgery Podiatrist compares to other specialties among Virginia providers

Virginia providers

Foot & Ankle Surgery Podiatrist share within Virginia

1. Foot & Ankle Surgery Podiatrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Foot & Ankle Surgery Podiatrist share within Virginia

Medicare quality performance — MIPS

WILLIAM KNUDSON, DPM's 2023 MIPS final score plotted against the Foot & Ankle Surgery Podiatrist national average

Below national average
MIPS Final Score
75/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Foot & Ankle Surgery Podiatrist) — 75/100 vs national avg 83.1

0%100%National avg83%75%
MIPS final score (Foot & Ankle Surgery Podiatrist) — 75/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

WILLIAM KNUDSON, DPM is a Foot & Ankle Surgery Podiatrist provider practicing in LEESBURG, Virginia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DPM. NPI: 1083608814. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

WILLIAM KNUDSON, DPM appears in the CMS NPPES registry as a Foot & Ankle Surgery Podiatrist provider holding DPM credentials at 224D CORNWALL ST NW, LEESBURG, VA, 20176, with a listed phone of (703) 777-5830. NPI 1083608814 was issued on 09/08/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KNUDSON most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 482 prescription claims written by this provider, covering 194 Medicare beneficiaries and totaling roughly $11K in drug spend, split 3% brand-name and 97% generic by claim count, with an opioid prescribing rate of 4.6%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 75/100 for the 2023 performance year, compared with the national average of 83.1.

Foot & Ankle Surgery Podiatrist is a mid-sized specialty nationwide, with 8,920 enrolled providers across 53 states and an average of 309 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

224D CORNWALL ST NW
LEESBURG, VA 20176

Provider Details

NPI 1083608814
Specialty Foot & Ankle Surgery Podiatrist
Credentials DPM
Gender Male
NPI Issued 09/08/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

75
Final Score
Avg: 83.1

Reporting: Group practice

Hospital and facility affiliations

Facilities where WILLIAM KNUDSON, DPM bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

FOOT AND ANKLE SPECIALISTS OF THE MID-ATLANTIC LLC
LEESBURG, VA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for WILLIAM KNUDSON, DPM. Source: openpaymentsdata.cms.gov.

Total received

$580

Largest payer

ANI Pharmaceuticals, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Generic-heavy

WILLIAM KNUDSON, DPM — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 482 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

482
Total Claims
$11K
Total Drug Cost
194
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
681
Total Day Supply
16,931
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$3K
Generic Drug Cost
$8K
Opioid Claims
22 (4.6% rate)
Antibiotic Claims
68

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.10
Gender Split
61% female / 39% male
Age Distribution
<65: 13, 65-74: 94, 75-84: 73, 85+: 14

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Gabapentin
115
Pregabalin
56
Allopurinol
45
Cefdinir
43
Prednisone
26
Methylprednisolone
25
Terbinafine Hcl
23
Meloxicam
21
Celecoxib
15
Duloxetine Hcl
15

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Foot & Ankle Surgery Podiatrist Overview

How WILLIAM KNUDSON, DPM fits within the Foot & Ankle Surgery Podiatrist landscape nationally.

8,920
Foot & Ankle Surgery Podiatrist Providers in US
53
States with Foot & Ankle Surgery Podiatrist
309
Avg Claims per Provider

WILLIAM KNUDSON, DPM's 482 claims are above the specialty average of 309.

Nearby Foot & Ankle Surgery Podiatrist Providers in Virginia

Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as KNUDSON.

Compare Foot & Ankle Surgery Podiatrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM KNUDSON, DPM's specialty?
WILLIAM KNUDSON, DPM specializes in Foot & Ankle Surgery Podiatrist and practices in LEESBURG, Virginia. Credentials: DPM.
How much does WILLIAM KNUDSON, DPM prescribe under Medicare Part D?
In 2023, WILLIAM KNUDSON, DPM wrote 482 Medicare Part D claims totaling $11K in drug costs for 194 beneficiaries.
What is WILLIAM KNUDSON, DPM's Medicare quality score?
WILLIAM KNUDSON, DPM has a CMS MIPS Final Score of 75/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is WILLIAM KNUDSON, DPM located?
WILLIAM KNUDSON, DPM is located at 224D CORNWALL ST NW, LEESBURG, VA, 20176. Phone: (703) 777-5830.
What is WILLIAM KNUDSON, DPM's NPI number?
WILLIAM KNUDSON, DPM's National Provider Identifier (NPI) is 1083608814, issued on 09/08/2005.
Does WILLIAM KNUDSON, DPM prescribe more brand-name or generic drugs?
WILLIAM KNUDSON, DPM's prescribing is 3% brand-name and 97% generic drugs by claim count, with $3K in brand drug costs.
Does WILLIAM KNUDSON, DPM prescribe opioids?
Yes, WILLIAM KNUDSON, DPM had 22 opioid claims in 2023 with an opioid prescribing rate of 4.6%.
How many Foot & Ankle Surgery Podiatrist providers are there in the US?
There are 8,920 Foot & Ankle Surgery Podiatrist providers across 53 states in the US. The average Foot & Ankle Surgery Podiatrist provider writes 309 Medicare Part D claims per year.
What drugs does WILLIAM KNUDSON, DPM prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM KNUDSON, DPM's most frequently prescribed drugs include Gabapentin, Pregabalin, Allopurinol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM KNUDSON, DPM accept Medicare?
WILLIAM KNUDSON, DPM appears in CMS Medicare data with 482 Part D claims and 194 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM KNUDSON, DPM's credentials?
WILLIAM KNUDSON, DPM's NPI is 1083608814 with credentials DPM. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology