NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1376049304
Verify on CMS → Kevin Diasti
Hematology (Internal Medicine) Physician in Leesburg, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,436 in Hematology (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
72
Medicare Part D claims · 12 beneficiaries · Hematology (Internal Medicine) Physician avg: 693
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$456.06
12 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Kevin Diasti filed 72 Medicare Part D claims in 2023 as a Hematology (Internal Medicine) Physician in Leesburg, Virginia, prescribing 78% generic.
- 72
- Part D claims, 2023
- 78%
- 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.
Kevin Diasti's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
72 0th percentile higher than 0% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Kevin Diasti 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 Kevin Diasti?
Quality data not reportedPrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
72 90% vs specialty avg
Specialty distribution in Virginia
How Hematology (Internal Medicine) Physician compares to other specialties among Virginia 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 Hematology (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).
Kevin Diasti appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider at 44035 RIVERSIDE PKWY STE 300, Leesburg, VA, 20176, with a listed phone of (571) 350-8400. NPI 1376049304 was issued on 03/30/2018.
Medicare Part D records for calendar year 2023 show 72 prescription claims written by this provider, covering 12 Medicare beneficiaries and totaling roughly $267K in drug spend, split 22% brand-name and 78% generic by claim count.
Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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 | 1376049304 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Gender | Male |
| NPI Issued | 03/30/2018 |
Hospital and facility affiliations
Facilities where Kevin Diasti 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.
Virginia Cancer Specialists, P.C.
Reston, VA
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 Kevin Diasti. Source: openpaymentsdata.cms.gov.
Total received
$456
Largest payer
Myriad Genetic Laboratories, 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
Kevin Diasti - brand share 22.0%
Hematology (Internal Medicine) Physician average
22% brand-name claims vs 78% generic, on 72 2023 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 2023.
72
Total Claims
$267K
Total Drug Cost
12
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 72
- Total Day Supply
- 1,956
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $264K
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.70
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kevin Diasti prescribes most
Top Medicare Part D drugs by claim count, 2023
- Anastrozole
Anastrozole
30 claims
- Letrozole
Letrozole
13 claims
- Sprycel
Sprycel
12 claims
| Drug | Claims |
|---|---|
| Anastrozole | 30 |
| Letrozole | 13 |
| Sprycel Dasatinib | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hematology (Internal Medicine) Physician in VA →
All providers in Virginia →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Kevin Diasti fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider
Kevin Diasti's 72 claims are below the specialty average of 693.
Nearby Hematology (Internal Medicine) Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Diasti.
Dr. Ivan Aksentijevich
M.D.
Alexandria, VA
Dr. Emily Ayers
MD
Charlottesville, VA
Dr. Christina Brzezniak
DO
Reston, VA
Dr. Igryl Cordero-Hernandez
M.D.
Manassas, VA
Dr. John Densmore
M.D.
Charlottesville, VA
Compare Hematology (Internal 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 Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology (Internal 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 Kevin Diasti's specialty? ▼
Kevin Diasti specializes in Hematology (Internal Medicine) Physician and practices in Leesburg, Virginia.
How much does Kevin Diasti prescribe under Medicare Part D? ▼
In 2023, Kevin Diasti wrote 72 Medicare Part D claims totaling $267K in drug costs for 12 beneficiaries.
Where is Kevin Diasti located? ▼
Kevin Diasti is located at 44035 RIVERSIDE PKWY STE 300, Leesburg, VA, 20176. Phone: (571) 350-8400.
What is Kevin Diasti's NPI number? ▼
Kevin Diasti's National Provider Identifier (NPI) is 1376049304, issued on 03/30/2018.
Does Kevin Diasti prescribe more brand-name or generic drugs? ▼
Kevin Diasti's prescribing is 22% brand-name and 78% generic drugs by claim count, with $264K in brand drug costs.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
What drugs does Kevin Diasti prescribe most often? ▼
Based on 2023 Medicare Part D data, Kevin Diasti's most frequently prescribed drugs include Anastrozole, Letrozole, Sprycel. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kevin Diasti accept Medicare? ▼
Kevin Diasti appears in CMS Medicare data with 72 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kevin Diasti's credentials? ▼
Kevin Diasti's NPI is 1376049304. 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.