2026 NPPES data Hepatology Physician NPI 1144469826 M.D.
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CHAN CHUNG, M.D.

Hepatology Physician in NASHVILLE, Tennessee. 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
1K
Medicare Part D claims · 389 beneficiaries · Hepatology Physician avg: 803
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CHAN CHUNG, M.D. filed 1,403 Medicare Part D claims in 2023 as a Hepatology Physician in NASHVILLE, Tennessee, prescribing 84% generic.

1K
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.

CHAN CHUNG, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,403 Top 20% higher than 80% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). This entry sits in this band. 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 certification likely (heuristic — not verified)

CHAN CHUNG, M.D. 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 CHAN CHUNG, M.D.?

Quality data not reported

NPI registry status

Active

Issued 02/19/2009

NPI 1144469826

Primary specialty

Hepatology Physician

Rare

281 US NPIs in this specialty

Medicare Part D claims

1,403 75% vs specialty avg

2023 prescription claims

Specialty avg: 803

Specialty distribution in Tennessee

How Hepatology Physician compares to other specialties among Tennessee providers

Tennessee providers

Hepatology Physician share within Tennessee

1. Hepatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hepatology Physician share within Tennessee

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Hepatology 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).

CHAN CHUNG, M.D. appears in the CMS NPPES registry as a Hepatology Physician provider holding M.D. credentials at 1301 MEDICAL CENTER DR, NASHVILLE, TN, 37232, with a listed phone of (615) 322-3373. NPI 1144469826 was issued on 02/19/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHUNG 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 1,403 prescription claims written by this provider, covering 389 Medicare beneficiaries and totaling roughly $840K in drug spend, split 16% brand-name and 84% generic by claim count. 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.

Hepatology Physician is a narrow specialty nationwide, with 281 enrolled providers across 36 states and an average of 803 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

1301 MEDICAL CENTER DR
NASHVILLE, TN 37232

Provider Details

NPI 1144469826
Specialty Hepatology Physician
Credentials M.D.
Gender Male
NPI Issued 02/19/2009

Hospital and facility affiliations

Facilities where CHAN CHUNG, M.D. 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
SAN MARCOS, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

CHAN CHUNG, M.D. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 1,403 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.

1,403
Total Claims
$840K
Total Drug Cost
389
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,302
Total Day Supply
91,829
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$758K
Generic Drug Cost
$83K
Antibiotic Claims
209

Patient Demographics

Average Patient Age
72.2 years
Avg HCC Risk Score
1.72
Gender Split
50% female / 50% male
Age Distribution
<65: 19, 65-74: 231, 75-84: 120, 85+: 19

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What CHAN CHUNG, M.D. 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
Xifaxan
Rifaximin
145
Ursodiol
133
Lactulose
116
Spironolactone
112
Omeprazole
95
Furosemide
75
Azathioprine
69
Entecavir
58
Amoxicillin
32
Prednisone
31

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Hepatology Physician Overview

How CHAN CHUNG, M.D. fits within the Hepatology Physician landscape nationally.

281
Hepatology Physician Providers in US
36
States with Hepatology Physician
803
Avg Claims per Provider

CHAN CHUNG, M.D.'s 1,403 claims are above the specialty average of 803.

Nearby Hepatology Physician Providers in Tennessee

Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as CHUNG.

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

Frequently Asked Questions

What is CHAN CHUNG, M.D.'s specialty?
CHAN CHUNG, M.D. specializes in Hepatology Physician and practices in NASHVILLE, Tennessee. Credentials: M.D..
How much does CHAN CHUNG, M.D. prescribe under Medicare Part D?
In 2023, CHAN CHUNG, M.D. wrote 1,403 Medicare Part D claims totaling $840K in drug costs for 389 beneficiaries.
Where is CHAN CHUNG, M.D. located?
CHAN CHUNG, M.D. is located at 1301 MEDICAL CENTER DR, NASHVILLE, TN, 37232. Phone: (615) 322-3373.
What is CHAN CHUNG, M.D.'s NPI number?
CHAN CHUNG, M.D.'s National Provider Identifier (NPI) is 1144469826, issued on 02/19/2009.
Does CHAN CHUNG, M.D. prescribe more brand-name or generic drugs?
CHAN CHUNG, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $758K in brand drug costs.
How many Hepatology Physician providers are there in the US?
There are 281 Hepatology Physician providers across 36 states in the US. The average Hepatology Physician provider writes 803 Medicare Part D claims per year.
What drugs does CHAN CHUNG, M.D. prescribe most often?
Based on 2023 Medicare Part D data, CHAN CHUNG, M.D.'s most frequently prescribed drugs include Xifaxan, Ursodiol, Lactulose. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHAN CHUNG, M.D. accept Medicare?
CHAN CHUNG, M.D. appears in CMS Medicare data with 1,403 Part D claims and 389 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHAN CHUNG, M.D.'s credentials?
CHAN CHUNG, M.D.'s NPI is 1144469826 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

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