NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1518946946 M.D.
Verify on CMS → William Willis, M.D.
Emergency Medicine Physician in Jackson, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency Medicine 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
305
Medicare Part D claims · 202 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
75/100
CMS neutral threshold · no category scores published
What the federal data shows
William Willis, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 305 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 305
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥57th
- pct by Part D claim volume (lower-bound band)
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 Willis, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
305 ≥ 57th percentile 57% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
William Willis, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Willis, M.D.?
CMS neutral score, not measuredPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
305 13% vs specialty avg
MIPS final score
75/100
Specialty distribution in Tennessee
How Emergency Medicine Physician compares to other specialties among Tennessee providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 Willis, M.D. appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding M.D. credentials at 708 W FOREST AVE, Jackson, TN, 38301, with a listed phone of (731) 660-8759. NPI 1518946946 was issued on 01/13/2006.
Medicare Part D records for calendar year 2023 show 305 prescription claims written by this provider, covering 202 Medicare beneficiaries and totaling roughly $12K in drug spend. On the CMS Merit-based Incentive Payment System, this provider carries a Final Score of 75/100 for the 2023 performance year, but CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score: this is the neutral performance threshold CMS assigns where nothing was scored, so it is not comparable with clinicians whose score was measured.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,463 enrolled providers across 56 states and an average of 352 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 | 1518946946 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/13/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Group practice
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
305
Total Claims
$12K
Total Drug Cost
202
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 305
- Total Day Supply
- 3,439
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 83
Patient Demographics
- Average Patient Age
- 66.5 years
- Avg HCC Risk Score
- 1.78
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 71, 65-74: 74, 75-84: 42, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Willis, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
47 claims
- Ondansetron Odt
Ondansetron Odt
28 claims
- Ibuprofen
Ibuprofen
26 claims
- Sulfamethoxazole-T…
Sulfamethoxazole-Trimethoprim
19 claims
- Cephalexin 18
Cephalexin
18 claims
- Doxycycline Hyclate 18
Doxycycline Hyclate
18 claims
- Cyclobenzaprine Hcl 15
Cyclobenzaprine Hcl
15 claims
- Eliquis 14
Eliquis
14 claims
| Drug | Claims |
|---|---|
| Prednisone | 47 |
| Ondansetron Odt Ondansetron | 28 |
| Ibuprofen | 26 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 19 |
| Cephalexin | 18 |
| Doxycycline Hyclate | 18 |
| Cyclobenzaprine Hcl | 15 |
| Eliquis Apixaban | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How William Willis, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
William Willis, M.D.'s 305 claims are below the specialty average of 352.
Nearby Emergency Medicine Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Willis.
Dr. John Abercrombie
M.D.
Memphis, TN
Dr. Charles Adams
M.D.
Knoxville, TN
Dr. David Adams-Chunn
M.D.
Nashville, TN
Dr. Amanda Addington
M.D.
Memphis, TN
Dr. Olugbenga Adebanjo
M.D
Memphis, TN
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Emergency Medicine 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 Willis, M.D.'s specialty? ▼
William Willis, M.D. specializes in Emergency Medicine Physician and practices in Jackson, Tennessee. Credentials: M.D..
How much does William Willis, M.D. prescribe under Medicare Part D? ▼
In 2023, William Willis, M.D. wrote 305 Medicare Part D claims totaling $12K in drug costs for 202 beneficiaries.
What is William Willis, M.D.'s Medicare quality score? ▼
William Willis, M.D. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Willis, M.D. located? ▼
William Willis, M.D. is located at 708 W FOREST AVE, Jackson, TN, 38301. Phone: (731) 660-8759.
What is William Willis, M.D.'s NPI number? ▼
William Willis, M.D.'s National Provider Identifier (NPI) is 1518946946, issued on 01/13/2006.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does William Willis, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Willis, M.D.'s most frequently prescribed drugs include Prednisone, Ondansetron Odt, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Willis, M.D. accept Medicare? ▼
William Willis, M.D. appears in CMS Medicare data with 305 Part D claims and 202 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Willis, M.D.'s credentials? ▼
William Willis, M.D.'s NPI is 1518946946 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
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.