NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1053378331 MD
Verify on CMS → John Ewing, MD
Addiction Medicine (Family Medicine) Physician in Madison, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 799 in Addiction Medicine (Family 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
508
Medicare Part D claims · 54 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Ewing, MD filed 508 Medicare Part D claims in 2024 as an Addiction Medicine (Family Medicine) Physician in Madison, Wisconsin, prescribing 92% generic.
- 508
- Part D claims, 2024
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥65th
- 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.
Federal trust snapshot
What official records show about John Ewing, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1053378331), first enumerated 04/28/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 508 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1053378331 · Addiction Medicine (Family Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1053378331
- ENUM-LEGACY 2006
- TAX-NARROW 799
- RX-LIGHT 508
- BOOK-THIN 10 in Wisconsin
- PHOTO-ENUM Martha Moore, MD-MPH · 2006
John Ewing, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
508 ≥ 65th percentile 65% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
John Ewing, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 John Ewing, MD?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
508 57% vs specialty avg
Specialty distribution in Wisconsin
How Addiction Medicine (Family Medicine) Physician compares to other specialties among Wisconsin providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Addiction Medicine (Family Medicine) Physician. Verify directly:
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).
Practice Address
Provider Details
| NPI | 1053378331 |
|---|---|
| Specialty | Addiction Medicine (Family Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/28/2006 |
Hospital and facility affiliations
Facilities where John Ewing, MD 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.
Meriter Hospital Inc
Madison, WI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
John Ewing, MD - brand share 8.0%
Addiction Medicine (Family Medicine) Physician average
8% brand-name claims vs 92% generic, on 508 2024 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 2024.
508
Total Claims
$52K
Total Drug Cost
54
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 576.367
- Total Day Supply
- 13,456
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $26K
- Generic Drug Cost
- $27K
- Opioid Claims
- 12 (2.4% rate)
Patient Demographics
- Average Patient Age
- 57.4 years
- Avg HCC Risk Score
- 1.53
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 35, 65-74: 16, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Ewing, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
62 claims
- Buprenorphine Hcl
Buprenorphine Hcl
45 claims
- Zolpidem Tartrate
Zolpidem Tartrate
34 claims
- Clonazepam
Clonazepam
27 claims
- Methylphenidate Hcl
Methylphenidate Hcl
26 claims
- Suboxone 24
Suboxone
24 claims
- Gabapentin 19
Gabapentin
19 claims
- Naltrexone Hcl 18
Naltrexone Hcl
18 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 62 |
| Buprenorphine Hcl | 45 |
| Zolpidem Tartrate | 34 |
| Clonazepam | 27 |
| Methylphenidate Hcl | 26 |
| Suboxone Buprenorphine Hcl/Naloxone Hcl | 24 |
| Gabapentin | 19 |
| Naltrexone Hcl | 18 |
| Quetiapine Fumarate | 18 |
| Ondansetron Odt Ondansetron | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Family Medicine) Physician in WI →
All providers in Wisconsin →
Compare specialties →
Addiction Medicine (Family Medicine) Physician Overview
How John Ewing, MD fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.
799
Addiction Medicine (Family Medicine) Physician Providers in US
49
States with Addiction Medicine (Family Medicine) Physician
1,187
Avg Claims per Provider
John Ewing, MD's 508 claims are below the specialty average of 1,187.
Nationwide Addiction Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Ewing, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Family Medicine) Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Ewing.
One of 10 Addiction Medicine (Family Medicine) Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Timothy Allen
MD
Cudahy, WI
Dr. Neville Duncan
M.D.
Milwaukee, WI
Dr. Robert Lea
MD
Chippewa Falls, WI
Dr. Jordan Mills
D.O.
Madison, WI
Dr. Hishita Parikh
M.D.
Wauwatosa, WI
Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Ewing, MD's specialty? ▼
John Ewing, MD specializes in Addiction Medicine (Family Medicine) Physician and practices in Madison, Wisconsin. Credentials: MD.
How much does John Ewing, MD prescribe under Medicare Part D? ▼
In 2024, John Ewing, MD wrote 508 Medicare Part D claims totaling $52K in drug costs for 54 beneficiaries.
Where is John Ewing, MD located? ▼
John Ewing, MD is located at 202 S PARK ST, Madison, WI, 53715. Phone: (608) 417-8144.
What is John Ewing, MD's NPI number? ▼
John Ewing, MD's National Provider Identifier (NPI) is 1053378331, issued on 04/28/2006.
Does John Ewing, MD prescribe more brand-name or generic drugs? ▼
John Ewing, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $26K in brand drug costs.
Does John Ewing, MD prescribe opioids? ▼
Yes, John Ewing, MD had 12 opioid claims in 2024 with an opioid prescribing rate of 2.4%.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 799 Addiction Medicine (Family Medicine) Physician providers across 49 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,187 Medicare Part D claims per year.
What drugs does John Ewing, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, John Ewing, MD's most frequently prescribed drugs include Buprenorphine-Naloxone, Buprenorphine Hcl, Zolpidem Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Ewing, MD accept Medicare? ▼
John Ewing, MD appears in CMS Medicare data with 508 Part D claims and 54 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Ewing, MD's credentials? ▼
John Ewing, MD's NPI is 1053378331 with credentials MD. 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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 August 2026 (NPPES) / 2024 (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 August 2026.