2026 NPPES data Physician Assistant NPI 1639616097 PA-C
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WILLIAM BADER, PA-C

Physician Assistant in NORTH CHESTERFIELD, 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
705
Medicare Part D claims · 338 beneficiaries · Physician Assistant avg: 790
MIPS score
76.3699/100
▼ 7 pts below national avg 83.1 · [object Object]
Industry payments
$28.76
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: WILLIAM BADER, PA-C is a Physician Assistant ([object Object]) practicing in NORTH CHESTERFIELD, Virginia with a Medicare Part D prescribing footprint of 705 claims across 338 beneficiaries . Their CMS MIPS Final Score of 76.3699/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $28.76 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What the federal data shows

WILLIAM BADER, PA-C reported a CMS MIPS final score of 76.3699/100 — below the 83.1 national average — and filed 705 Medicare Part D claims in 2023.

76.3699/100
MIPS score · -7 vs avg
705
Part D claims, 2023
$28.76
industry payments (Sunshine Act)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

WILLIAM BADER, PA-C's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

76 21st percentile higher than 21% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

WILLIAM BADER, PA-C at a glance

Below national average

NPI registry status

Active

Issued 01/24/2017

NPI 1639616097

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

705 11% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

76.3699/100 6.730099999999993% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Virginia

How Physician Assistant compares to other specialties among Virginia providers

Virginia providers

Physician Assistant share within Virginia

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Virginia

Medicare quality performance — MIPS

WILLIAM BADER, PA-C's 2023 MIPS final score plotted against the Physician Assistant national average

Below national average
MIPS Final Score
76.3699/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) — 76.3699/100 vs national avg 83.1

0%100%National avg83%76.4%
MIPS final score (Physician Assistant) — 76.3699/100 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 BADER, PA-C is a Physician Assistant provider practicing in NORTH CHESTERFIELD, Virginia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1639616097. 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 BADER, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 1400 JOHNSTON WILLIS DR, NORTH CHESTERFIELD, VA, 23235, with a listed phone of (804) 379-8088. NPI 1639616097 was issued on 01/24/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BADER 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 705 prescription claims written by this provider, covering 338 Medicare beneficiaries and totaling roughly $6K in drug spend, with an opioid prescribing rate of 15.3%. 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 76.3699/100 for the 2023 performance year (Quality 67.1603, Cost 54.0727), compared with the national average of 83.1.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

1400 JOHNSTON WILLIS DR
NORTH CHESTERFIELD, VA 23235

Provider Details

NPI 1639616097
Specialty Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 01/24/2017

CMS Quality Score (MIPS)

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

76.3699
Final Score
Avg: 83.1
67.1603
Quality
54.0727
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where WILLIAM BADER, PA-C 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.

ORTHOVIRGINIA INC
NORTH CHESTERFIELD, 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 BADER, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$29

Largest payer

Globus Medical, 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.

Medicare Part D Prescribing Data

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

705
Total Claims
$6K
Total Drug Cost
338
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
719
Total Day Supply
14,731
Generic Drug Cost
$6K
Opioid Claims
108 (15.3% rate)

Patient Demographics

Average Patient Age
70.6 years
Avg HCC Risk Score
1.11
Gender Split
63% female / 37% male
Age Distribution
<65: 52, 65-74: 182, 75-84: 86, 85+: 18

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Meloxicam
143
Gabapentin
136
Duloxetine Hcl
61
Cyclobenzaprine Hcl
54
Methylprednisolone
45
Diclofenac Sodium
39
Oxycodone Hcl
32
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
31
Tramadol Hcl
31
Tizanidine Hcl
22

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

Physician Assistant Overview

How WILLIAM BADER, PA-C fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

WILLIAM BADER, PA-C's 705 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Virginia

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

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM BADER, PA-C's specialty?
WILLIAM BADER, PA-C specializes in Physician Assistant and practices in NORTH CHESTERFIELD, Virginia. Credentials: PA-C.
How much does WILLIAM BADER, PA-C prescribe under Medicare Part D?
In 2023, WILLIAM BADER, PA-C wrote 705 Medicare Part D claims totaling $6K in drug costs for 338 beneficiaries.
What is WILLIAM BADER, PA-C's Medicare quality score?
WILLIAM BADER, PA-C has a CMS MIPS Final Score of 76.3699/100 (Quality: 67.1603, Cost: 54.0727). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is WILLIAM BADER, PA-C located?
WILLIAM BADER, PA-C is located at 1400 JOHNSTON WILLIS DR, NORTH CHESTERFIELD, VA, 23235. Phone: (804) 379-8088.
What is WILLIAM BADER, PA-C's NPI number?
WILLIAM BADER, PA-C's National Provider Identifier (NPI) is 1639616097, issued on 01/24/2017.
Does WILLIAM BADER, PA-C prescribe opioids?
Yes, WILLIAM BADER, PA-C had 108 opioid claims in 2023 with an opioid prescribing rate of 15.3%.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does WILLIAM BADER, PA-C prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM BADER, PA-C's most frequently prescribed drugs include Meloxicam, Gabapentin, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM BADER, PA-C accept Medicare?
WILLIAM BADER, PA-C appears in CMS Medicare data with 705 Part D claims and 338 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM BADER, PA-C's credentials?
WILLIAM BADER, PA-C's NPI is 1639616097 with credentials PA-C. 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