NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1356410195 M.D.
Verify on CMS → Thomas Day, M.D.
Dermatology Physician in Nashville, 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 15,011 in Dermatology 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 · 722 beneficiaries · Dermatology Physician avg: 799
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Industry payments
$3.4K
165 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Thomas Day, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 1,910 Medicare Part D claims in 2024.
- 75/100
- CMS neutral score · not measured
- 2K
- Part D claims, 2024
- 89%
- generic prescribing
- 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.
Federal trust snapshot
What official records show about Thomas Day, 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 1356410195), first enumerated 11/07/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,910 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
Source: CMS Quality Payment Program
- 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
Industry payment transparency
$3.4K in reported industry payments (165 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 1356410195 · Dermatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-NEUTRAL · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1356410195
- ENUM-LEGACY 2006
- TAX-MID 15K Dermatology Physician
- MIPS-NEUTRAL 75/100
- RX-MID 1,910
- BOOK-THIN 230 in Tennessee
- PHOTO-ENUM Ayelet Mizrachi-Joni… · 2006
Thomas Day, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,910 ≥ 83rd percentile 83% 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)
Thomas Day, 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 Thomas Day, M.D.?
CMS neutral score, not measuredPrimary specialty
Dermatology Physician
Medicare Part D claims
1,910 139% vs specialty avg
MIPS final score
75/100
Specialty distribution in Tennessee
How Dermatology 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).
Practice Address
Provider Details
| NPI | 1356410195 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/07/2006 |
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
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 Thomas Day, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$3.4K
Largest payer
ABBVIE 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 · Typical
Thomas Day, M.D. - brand share 11.0%
Dermatology Physician average
11% brand-name claims vs 89% generic, on 1,910 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.
1,910
Total Claims
$959K
Total Drug Cost
722
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,301.067
- Total Day Supply
- 60,560
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $914K
- Generic Drug Cost
- $45K
- Antibiotic Claims
- 228
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 27, 65-74: 311, 75-84: 303, 85+: 81
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Thomas Day, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Triamcinolone Acet…
Triamcinolone Acetonide
248 claims
- Ketoconazole
Ketoconazole
245 claims
- Hydrocortisone
Hydrocortisone
126 claims
- Mupirocin
Mupirocin
101 claims
- Doxycycline Hyclate 94
Doxycycline Hyclate
94 claims
- Betamethasone Dipr… 87
Betamethasone Dipropionate
87 claims
- Fluorouracil 86
Fluorouracil
86 claims
- Clobetasol Propion… 63
Clobetasol Propionate
63 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 248 |
| Ketoconazole | 245 |
| Hydrocortisone | 126 |
| Mupirocin | 101 |
| Doxycycline Hyclate | 94 |
| Betamethasone Dipropionate | 87 |
| Fluorouracil | 86 |
| Clobetasol Propionate | 63 |
| Minocycline Hcl | 62 |
| Fluocinonide | 60 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Thomas Day, M.D. fits within the Dermatology Physician landscape nationally.
15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider
Thomas Day, M.D.'s 1,910 claims are above the specialty average of 799.
Nationwide Dermatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Day, both outside Tennessee so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Dermatology Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Day.
One of 230 Dermatology Physician providers enrolled in Tennessee, 5 are shown here.
Dr. Vlatka Agnetta
M.D.
Chattanooga, TN
Dr. Adam Allan
DO
Clarksville, TN
Dr. Anne Allen
MD
Knoxville, TN
Dr. Elizabeth Anderson
MD
Knoxville, TN
Dr. Saundrett Arrindell
MD
Nashville, TN
Compare Dermatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Thomas Day, M.D.'s specialty? ▼
Thomas Day, M.D. specializes in Dermatology Physician and practices in Nashville, Tennessee. Credentials: M.D..
How much does Thomas Day, M.D. prescribe under Medicare Part D? ▼
In 2024, Thomas Day, M.D. wrote 1,910 Medicare Part D claims totaling $959K in drug costs for 722 beneficiaries.
What is Thomas Day, M.D.'s Medicare quality score? ▼
Thomas Day, 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 Thomas Day, M.D. located? ▼
Thomas Day, M.D. is located at 24 WHITE BRIDGE RD, Nashville, TN, 37205. Phone: (615) 352-0011.
What is Thomas Day, M.D.'s NPI number? ▼
Thomas Day, M.D.'s National Provider Identifier (NPI) is 1356410195, issued on 11/07/2006.
Does Thomas Day, M.D. prescribe more brand-name or generic drugs? ▼
Thomas Day, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $914K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 15,011 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 799 Medicare Part D claims per year.
What drugs does Thomas Day, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Thomas Day, M.D.'s most frequently prescribed drugs include Triamcinolone Acetonide, Ketoconazole, Hydrocortisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Day, M.D. accept Medicare? ▼
Thomas Day, M.D. appears in CMS Medicare data with 1,910 Part D claims and 722 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Day, M.D.'s credentials? ▼
Thomas Day, M.D.'s NPI is 1356410195 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 (2024). 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 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.