NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1942950464 DO
Verify on CMS → David Winchester, DO
Family Medicine Physician in Johnson City, 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 150,125 in 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
2K
Medicare Part D claims · 206 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
80%
generic claims · 19% 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
David Winchester, DO filed 1,677 Medicare Part D claims in 2024 as a Family Medicine Physician in Johnson City, Tennessee, prescribing 80% generic.
- 2K
- Part D claims, 2024
- 80%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥81st
- 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 David Winchester, DO
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 1942950464), first enumerated 03/27/2022.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,677 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 1942950464 · Family Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1942950464
- ENUM-RECENT 2022
- TAX-MEGA 150K Family Medicine
- RX-MID 1,677
- BOOK-LIGHT 2,570 in Tennessee
- PHOTO-ENUM Abigail Dillon · 2022
David Winchester, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,677 ≥ 81st percentile 81% 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)
David Winchester, DO 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 David Winchester, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
1,677 52% vs specialty avg
Specialty distribution in Tennessee
How Family Medicine Physician compares to other specialties among Tennessee 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 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 | 1942950464 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 03/27/2022 |
Hospital and facility affiliations
Facilities where David Winchester, DO 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.
State OF Franklin Healthcare Associates, PLLC
Johnson City, TN
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 · Typical
David Winchester, DO - brand share 19.0%
Family Medicine Physician average
19% brand-name claims vs 80% generic, on 1,677 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.
1,677
Total Claims
$219K
Total Drug Cost
206
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,251.433
- Total Day Supply
- 93,707
- Brand vs Generic
- 19% brand / 80% generic
- Brand Drug Cost
- $197K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 56
Patient Demographics
- Average Patient Age
- 65.5 years
- Avg HCC Risk Score
- 1.97
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 81, 65-74: 79, 75-84: 33, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What David Winchester, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
86 claims
- Amlodipine Besylate
Amlodipine Besylate
82 claims
- Jardiance
Jardiance
79 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
77 claims
- Lisinopril
Lisinopril
57 claims
- Ozempic
Ozempic
48 claims
- Losartan Potassium
Losartan Potassium
46 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
45 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 86 |
| Amlodipine Besylate | 82 |
| Jardiance Empagliflozin | 79 |
| Rosuvastatin Calcium | 77 |
| Lisinopril | 57 |
| Ozempic Semaglutide | 48 |
| Losartan Potassium | 46 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 45 |
| Metformin Hcl Er Metformin Hcl | 42 |
| Tamsulosin Hcl | 36 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How David Winchester, DO fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
David Winchester, DO's 1,677 claims are below the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Winchester, both outside Tennessee so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2022)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Winchester.
One of 2,570 Family Medicine Physician providers enrolled in Tennessee, 5 are shown here.
Dr. John Aaron
MD
Clarksville, TN
Dr. Rebecca Aaron
MD
Clarksville, TN
Dr. Richard Aasheim
M.D.
Greeneville, TN
Dr. Julia Abraham
MD
Knoxville, TN
Dr. Sydney Abramson
MD
Murfreesboro, TN
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is David Winchester, DO's specialty? ▼
David Winchester, DO specializes in Family Medicine Physician and practices in Johnson City, Tennessee. Credentials: DO.
How much does David Winchester, DO prescribe under Medicare Part D? ▼
In 2024, David Winchester, DO wrote 1,677 Medicare Part D claims totaling $219K in drug costs for 206 beneficiaries.
Where is David Winchester, DO located? ▼
David Winchester, DO is located at 301 MED TECH PKWY STE 240, Johnson City, TN, 37604. Phone: (423) 794-5520.
What is David Winchester, DO's NPI number? ▼
David Winchester, DO's National Provider Identifier (NPI) is 1942950464, issued on 03/27/2022.
Does David Winchester, DO prescribe more brand-name or generic drugs? ▼
David Winchester, DO's prescribing is 19% brand-name and 80% generic drugs by claim count, with $197K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does David Winchester, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, David Winchester, DO's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Jardiance. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Winchester, DO accept Medicare? ▼
David Winchester, DO appears in CMS Medicare data with 1,677 Part D claims and 206 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Winchester, DO's credentials? ▼
David Winchester, DO's NPI is 1942950464 with credentials DO. 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.