NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1083609564 PHD, M.D.
Verify on CMS → John Swisher, PHD, M.D.
Critical Care Medicine (Internal Medicine) Physician in Knoxville, 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 6,916 in Critical Care Medicine (Internal 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
3K
Medicare Part D claims · 309 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
0%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$71.9K
160 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Swisher, PHD, M.D. filed 2,942 Medicare Part D claims in 2024 as a Critical Care Medicine (Internal Medicine) Physician in Knoxville, Tennessee, prescribing 0% generic.
- 3K
- Part D claims, 2024
- 0%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥88th
- 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 Swisher, PHD, M.D.
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 1083609564), first enumerated 09/12/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,942 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
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$71.9K in reported industry payments (160 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1083609564 · Critical Care Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1083609564
- ENUM-LEGACY 2005
- TAX-MID 7K Critical Care
- RX-MID 2,942
- BOOK-THIN 134 in Tennessee
- PHOTO-ENUM Michael Waite, MD · 2005
John Swisher, PHD, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,942 ≥ 88th percentile 88% 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 Swisher, PHD, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Swisher, PHD, M.D.?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
2,942 167% vs specialty avg
Specialty distribution in Tennessee
How Critical Care Medicine (Internal 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 Critical Care Medicine (Internal 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 | 1083609564 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | PHD, M.D. |
| Gender | Male |
| NPI Issued | 09/12/2005 |
Hospital and facility affiliations
Facilities where John Swisher, PHD, 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.
Statcare Inpatient LLC
Knoxville, TN
Statcare Outpatient LLC
Knoxville, 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).
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 John Swisher, PHD, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$71.9K
Largest payer
Actelion Pharmaceuticals US, 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.
Brand vs generic prescribing mix · Brand-heavy
John Swisher, PHD, M.D. - brand share 53.0%
Critical Care Medicine (Internal Medicine) Physician average
53% brand-name claims vs 0% generic, on 2,942 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.
2,942
Total Claims
$14.7M
Total Drug Cost
309
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,636.7
- Total Day Supply
- 101,571
- Brand vs Generic
- 53% brand / 0% generic
- Brand Drug Cost
- $14.1M
- Opioid Claims
- 13 (0.4% rate)
- Antibiotic Claims
- 124
Patient Demographics
- Average Patient Age
- 73.4 years
- Avg HCC Risk Score
- 2.77
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 45, 65-74: 110, 75-84: 128, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Swisher, PHD, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Adempas
Adempas
254 claims
- Trelegy Ellipta
Trelegy Ellipta
244 claims
- Sildenafil Citrate
Sildenafil Citrate
185 claims
- Opsumit
Opsumit
181 claims
- Tyvaso Dpi
Tyvaso Dpi
175 claims
- Orenitram Er
Orenitram Er
162 claims
- Ambrisentan
Ambrisentan
151 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
138 claims
| Drug | Claims |
|---|---|
| Adempas Riociguat | 254 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 244 |
| Sildenafil Citrate | 185 |
| Opsumit Macitentan | 181 |
| Tyvaso Dpi Treprostinil | 175 |
| Orenitram Er Treprostinil Diolamine | 162 |
| Ambrisentan | 151 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 138 |
| Prednisone | 133 |
| Furosemide | 119 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in TN →
All providers in Tennessee →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How John Swisher, PHD, M.D. fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,916
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,103
Avg Claims per Provider
John Swisher, PHD, M.D.'s 2,942 claims are above the specialty average of 1,103.
Nationwide Critical Care Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Swisher, both outside Tennessee so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Swisher.
One of 134 Critical Care Medicine (Internal Medicine) Physician providers enrolled in Tennessee, 5 are shown here.
Frequently Asked Questions
What is John Swisher, PHD, M.D.'s specialty? ▼
John Swisher, PHD, M.D. specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Knoxville, Tennessee. Credentials: PHD, M.D..
How much does John Swisher, PHD, M.D. prescribe under Medicare Part D? ▼
In 2024, John Swisher, PHD, M.D. wrote 2,942 Medicare Part D claims totaling $14.7M in drug costs for 309 beneficiaries.
Where is John Swisher, PHD, M.D. located? ▼
John Swisher, PHD, M.D. is located at 6473 KINGSTON PIKE, Knoxville, TN, 37919. Phone: (865) 588-8831.
What is John Swisher, PHD, M.D.'s NPI number? ▼
John Swisher, PHD, M.D.'s National Provider Identifier (NPI) is 1083609564, issued on 09/12/2005.
Does John Swisher, PHD, M.D. prescribe more brand-name or generic drugs? ▼
John Swisher, PHD, M.D.'s prescribing is 53% brand-name and 0% generic drugs by claim count, with $14.1M in brand drug costs.
Does John Swisher, PHD, M.D. prescribe opioids? ▼
Yes, John Swisher, PHD, M.D. had 13 opioid claims in 2024 with an opioid prescribing rate of 0.4%.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,916 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,103 Medicare Part D claims per year.
What drugs does John Swisher, PHD, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Swisher, PHD, M.D.'s most frequently prescribed drugs include Adempas, Trelegy Ellipta, Sildenafil Citrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Swisher, PHD, M.D. accept Medicare? ▼
John Swisher, PHD, M.D. appears in CMS Medicare data with 2,942 Part D claims and 309 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Swisher, PHD, M.D.'s credentials? ▼
John Swisher, PHD, M.D.'s NPI is 1083609564 with credentials PHD, 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 (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.