2026 NPPES data Hospitalist Physician NPI 1578212254 MD, PHD
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AARON SUN, MD, PHD

Hospitalist Physician in DURHAM, North Carolina. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
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

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 reported

NPI registry status

Active

Issued 03/21/2022

NPI 1578212254

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

305 66% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in North Carolina

How Hospitalist Physician compares to other specialties among North Carolina providers

North Carolina providers

Hospitalist Physician share within North Carolina

1. Hospitalist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospitalist Physician share within North Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Hospitalist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hospitalist Physician ABMS/AOA estimate

Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SUN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 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

508 FULTON ST
DURHAM, NC 27705

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

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
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.

16,825
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.

Compare Hospitalist Physician nationally: see state-by-state distribution →

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 16,825 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

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