NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1578212254 MD, PHD
Verify on CMS → Aaron Sun, MD, PHD
Hospitalist Physician in Durham, North Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,938 in Hospitalist 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
305
Medicare Part D claims · 95 beneficiaries · Hospitalist Physician avg: 888
What the federal data shows
Aaron Sun, MD, PHD filed 305 Medicare Part D claims in 2023 as a Hospitalist Physician in Durham, North Carolina.
- 305
- Part D claims, 2023
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.
Aaron Sun, MD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
305 Top 43% higher than 57% 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-eligible specialty (heuristic, not verified)
Aaron Sun, MD, PHD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Aaron Sun, MD, PHD?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
305 66% vs specialty avg
Specialty distribution in North Carolina
How Hospitalist Physician compares to other specialties among North Carolina 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 Hospitalist 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).
Aaron Sun, MD, PHD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD, PHD credentials at 508 FULTON ST, Durham, NC, 27705, with a listed phone of (919) 286-0411. NPI 1578212254 was issued on 03/21/2022.
Medicare Part D records for calendar year 2023 show 305 prescription claims written by this provider, covering 95 Medicare beneficiaries and totaling roughly $63K in drug spend, with an opioid prescribing rate of 4.6%.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,938 enrolled providers across 54 states and an average of 888 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 | 1578212254 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 03/21/2022 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
305
Total Claims
$63K
Total Drug Cost
95
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 413
- Total Day Supply
- 10,801
- Generic Drug Cost
- $11K
- Opioid Claims
- 14 (4.6% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 67.9 years
- Avg HCC Risk Score
- 2.62
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 27, 65-74: 39, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Aaron Sun, MD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Losartan Potassium
Losartan Potassium
12 claims
- Ozempic
Ozempic
12 claims
- Jardiance
Jardiance
11 claims
| Drug | Claims |
|---|---|
| Losartan Potassium | 12 |
| Ozempic Semaglutide | 12 |
| Jardiance Empagliflozin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Aaron Sun, MD, PHD fits within the Hospitalist Physician landscape nationally.
16,938
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Aaron Sun, MD, PHD's 305 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Sun.
Dr. Mohammed Abdulhaleem
MD
Winston Salem, NC
Dr. Nicole Abello
DO
Asheville, NC
Elizabeth Abernathy
Charlotte, NC
Dr. Sudeep Acharya
M.D.
Chapel Hill, NC
Dr. Kevin Addison
MD
Mooresville, NC
Compare Hospitalist 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 North Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist 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 North Carolina
Frequently Asked Questions
What is Aaron Sun, MD, PHD's specialty? ▼
Aaron Sun, MD, PHD specializes in Hospitalist Physician and practices in Durham, North Carolina. Credentials: MD, PHD.
How much does Aaron Sun, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Aaron Sun, MD, PHD wrote 305 Medicare Part D claims totaling $63K in drug costs for 95 beneficiaries.
Where is Aaron Sun, MD, PHD located? ▼
Aaron Sun, MD, PHD is located at 508 FULTON ST, Durham, NC, 27705. Phone: (919) 286-0411.
What is Aaron Sun, MD, PHD's NPI number? ▼
Aaron Sun, MD, PHD's National Provider Identifier (NPI) is 1578212254, issued on 03/21/2022.
Does Aaron Sun, MD, PHD prescribe opioids? ▼
Yes, Aaron Sun, MD, PHD had 14 opioid claims in 2023 with an opioid prescribing rate of 4.6%.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,938 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Aaron Sun, MD, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Aaron Sun, MD, PHD's most frequently prescribed drugs include Losartan Potassium, Ozempic, Jardiance. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Aaron Sun, MD, PHD accept Medicare? ▼
Aaron Sun, MD, PHD appears in CMS Medicare data with 305 Part D claims and 95 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aaron Sun, MD, PHD's credentials? ▼
Aaron Sun, MD, PHD's NPI is 1578212254 with credentials MD, PHD. 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
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 May 2026.