NPI registry status
Active
2026 NPPES data Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician NPI 1174653976 M.D.
Verify on CMS → William Arnold, M.D.
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician in Columbia, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 149 in Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
29
Medicare Part D claims · Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician avg: 682
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Arnold, M.D. reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 29 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 29
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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 Arnold, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% of 477,587 scored providers
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
Where William Arnold, M.D. sits
This provider among neuromuscular medicine (physical medicine & rehabilitation) physician peers
Across the 20 neuromuscular medicine (physical medicine & rehabilitation) physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Arnold, M.D. writes more Part D claims than 15% of them and scores higher on MIPS quality than 90% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one neuromuscular medicine (physical medicine & rehabilitation) physician peer from a representative sample of 19; the gold marker is William Arnold, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Arnold, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Arnold, M.D.?
High performer (top quartile)Primary specialty
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician
Medicare Part D claims
29 96% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Missouri
How Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
William Arnold, M.D.'s 2023 MIPS final score plotted against the Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician) - 100/100 vs national avg 83.1
How MIPS and board certification work
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 Arnold, M.D. appears in the CMS NPPES registry as a Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician provider holding M.D. credentials at ONE HOSPITAL DR, Columbia, MO, 65212, with a listed phone of (573) 882-3101. NPI 1174653976 was issued on 03/07/2007.
Medicare Part D records for calendar year 2023 show 29 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $102K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year, compared with the national average of 83.1.
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician is a narrow specialty nationwide, with 149 enrolled providers across 35 states and an average of 682 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
Provider Details
| NPI | 1174653976 |
|---|---|
| Specialty | Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/07/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where William Arnold, M.D. 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.
The Curators OF The University OF Missouri
Columbia, MO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
29
Total Claims
$102K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 42
- Total Day Supply
- 1,214
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 1.62
More Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician in MO →
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Compare specialties →
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician Overview
How William Arnold, M.D. fits within the Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician landscape nationally.
149
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician Providers in US
35
States with Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician
682
Avg Claims per Provider
William Arnold, M.D.'s 29 claims are below the specialty average of 682.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is William Arnold, M.D.'s specialty? ▼
William Arnold, M.D. specializes in Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician and practices in Columbia, Missouri. Credentials: M.D..
How much does William Arnold, M.D. prescribe under Medicare Part D? ▼
In 2023, William Arnold, M.D. wrote 29 Medicare Part D claims totaling $102K in drug costs for N/A beneficiaries.
What is William Arnold, M.D.'s Medicare quality score? ▼
William Arnold, M.D. has a CMS MIPS Final Score of 100/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Arnold, M.D. located? ▼
William Arnold, M.D. is located at ONE HOSPITAL DR, Columbia, MO, 65212. Phone: (573) 882-3101.
What is William Arnold, M.D.'s NPI number? ▼
William Arnold, M.D.'s National Provider Identifier (NPI) is 1174653976, issued on 03/07/2007.
How many Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician providers are there in the US? ▼
There are 149 Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician providers across 35 states in the US. The average Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician provider writes 682 Medicare Part D claims per year.
Does William Arnold, M.D. accept Medicare? ▼
William Arnold, M.D. appears in CMS Medicare data with 29 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Arnold, M.D.'s credentials? ▼
William Arnold, M.D.'s NPI is 1174653976 with credentials M.D.. 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.