NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1144214958 MD
Verify on CMS → Ashutosh Diwan, MD
Addiction Medicine (Family Medicine) Physician in Warrenton, 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 763 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
7K
Medicare Part D claims · 372 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$596.31
36 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
Ashutosh Diwan, MD filed 6,706 Medicare Part D claims in 2023 as a Addiction Medicine (Family Medicine) Physician in Warrenton, Virginia, prescribing 84% generic.
- 7K
- Part D claims, 2023
- 84%
- 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.
Ashutosh Diwan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,706 Top 4% higher than 96% 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)
Ashutosh Diwan, MD 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 Ashutosh Diwan, MD?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
6,706 6× vs specialty avg
Specialty distribution in Virginia
How Addiction Medicine (Family 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 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).
Ashutosh Diwan, MD appears in the CMS NPPES registry as a Addiction Medicine (Family Medicine) Physician provider holding MD credentials at 493 BLACKWELL RD, Warrenton, VA, 20186, with a listed phone of (540) 347-4400. NPI 1144214958 was issued on 09/07/2005.
Medicare Part D records for calendar year 2023 show 6,706 prescription claims written by this provider, covering 372 Medicare beneficiaries and totaling roughly $854K in drug spend, split 15% brand-name and 84% generic by claim count, with an opioid prescribing rate of 22.7%.
Addiction Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 763 enrolled providers across 48 states and an average of 1,134 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 | 1144214958 |
|---|---|
| Specialty | Addiction Medicine (Family Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/07/2005 |
Hospital and facility affiliations
Facilities where Ashutosh Diwan, 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.
Mid America Pain Clinic LLC
Overland Park, KS
Uva Community Health Medical Group LLC
Warrenton, 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 Ashutosh Diwan, MD. Source: openpaymentsdata.cms.gov.
Total received
$596
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
Ashutosh Diwan, MD - brand share 15.0%
Addiction Medicine (Family Medicine) Physician average
15% brand-name claims vs 84% generic, on 6,706 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.
6,706
Total Claims
$854K
Total Drug Cost
372
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 10,795
- Total Day Supply
- 298,643
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $594K
- Generic Drug Cost
- $259K
- Opioid Claims
- 1,519 (22.7% rate)
- Antibiotic Claims
- 137
Patient Demographics
- Average Patient Age
- 67.8 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 111, 65-74: 176, 75-84: 69, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ashutosh Diwan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
363 claims
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
354 claims
- Oxycodone Hcl
Oxycodone Hcl
326 claims
- Gabapentin
Gabapentin
245 claims
- Levothyroxine Sodium
Levothyroxine Sodium
186 claims
- Atorvastatin Calcium
Atorvastatin Calcium
185 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
174 claims
- Amlodipine Besylate 136
Amlodipine Besylate
136 claims
| Drug | Claims |
|---|---|
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 363 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 354 |
| Oxycodone Hcl | 326 |
| Gabapentin | 245 |
| Levothyroxine Sodium | 186 |
| Atorvastatin Calcium | 185 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 174 |
| Amlodipine Besylate | 136 |
| Tizanidine Hcl | 122 |
| Pantoprazole Sodium | 116 |
* 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 VA →
All providers in Virginia →
Compare specialties →
Addiction Medicine (Family Medicine) Physician Overview
How Ashutosh Diwan, MD fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.
763
Addiction Medicine (Family Medicine) Physician Providers in US
48
States with Addiction Medicine (Family Medicine) Physician
1,134
Avg Claims per Provider
Ashutosh Diwan, MD's 6,706 claims are above the specialty average of 1,134.
Nearby Addiction Medicine (Family Medicine) Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Diwan.
Dr. Kimberly Albero
DNP FNP-BC
Charlottesville, VA
Dr. William Alford
MD
Virginia Beach, VA
Dr. Chastity Campbell
MSN, APRN, FNP-C
Richmond, VA
Dr. Maria Encarnacion
M.D.
Willis, VA
Dr. Su Fairchild
MD
Winchester, VA
Compare Addiction Medicine (Family 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 Addiction Medicine (Family 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Virginia
Frequently Asked Questions
What is Ashutosh Diwan, MD's specialty? ▼
Ashutosh Diwan, MD specializes in Addiction Medicine (Family Medicine) Physician and practices in Warrenton, Virginia. Credentials: MD.
How much does Ashutosh Diwan, MD prescribe under Medicare Part D? ▼
In 2023, Ashutosh Diwan, MD wrote 6,706 Medicare Part D claims totaling $854K in drug costs for 372 beneficiaries.
Where is Ashutosh Diwan, MD located? ▼
Ashutosh Diwan, MD is located at 493 BLACKWELL RD, Warrenton, VA, 20186. Phone: (540) 347-4400.
What is Ashutosh Diwan, MD's NPI number? ▼
Ashutosh Diwan, MD's National Provider Identifier (NPI) is 1144214958, issued on 09/07/2005.
Does Ashutosh Diwan, MD prescribe more brand-name or generic drugs? ▼
Ashutosh Diwan, MD's prescribing is 15% brand-name and 84% generic drugs by claim count, with $594K in brand drug costs.
Does Ashutosh Diwan, MD prescribe opioids? ▼
Yes, Ashutosh Diwan, MD had 1,519 opioid claims in 2023 with an opioid prescribing rate of 22.7%.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 763 Addiction Medicine (Family Medicine) Physician providers across 48 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,134 Medicare Part D claims per year.
What drugs does Ashutosh Diwan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ashutosh Diwan, MD's most frequently prescribed drugs include Oxycodone-Acetaminophen, Buprenorphine-Naloxone, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ashutosh Diwan, MD accept Medicare? ▼
Ashutosh Diwan, MD appears in CMS Medicare data with 6,706 Part D claims and 372 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ashutosh Diwan, MD's credentials? ▼
Ashutosh Diwan, MD's NPI is 1144214958 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 (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.