2026 NPPES data General Practice Physician NPI 1992897458 M.D.
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SAMUEL CHUNG, M.D.

General Practice Physician in MONTEREY PARK, California. 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
2K
Medicare Part D claims · 213 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$21.42
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: SAMUEL CHUNG, M.D. is a General Practice Physician ([object Object]) practicing in MONTEREY PARK, California with a Medicare Part D prescribing footprint of 2K claims across 213 beneficiaries — 17% brand-name prescribing . Industry payments of $21.42 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: SAMUEL CHUNG, M.D. filed 2,206 Medicare Part D claims in 2023 across MONTEREY PARK, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

SAMUEL CHUNG, M.D. 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).

SAMUEL CHUNG, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 09/29/2006

NPI 1992897458

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

2,206 23% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in California

How General Practice Physician compares to other specialties among California providers

California providers

General Practice Physician share within California

1. General Practice Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Physician share within California

Specialty board-certification context

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

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

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

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

SAMUEL CHUNG, M.D. is a General Practice Physician provider practicing in MONTEREY PARK, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1992897458. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

SAMUEL CHUNG, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 223 N. GARFIELD AVE, SUITE 301, MONTEREY PARK, CA, 91754, with a listed phone of (626) 572-3688. NPI 1992897458 was issued on 09/29/2006. 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 2,206 prescription claims written by this provider, covering 213 Medicare beneficiaries and totaling roughly $251K in drug spend, split 17% brand-name and 83% 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

223 N. GARFIELD AVE, SUITE 301
MONTEREY PARK, CA 91754

Provider Details

NPI 1992897458
Specialty General Practice Physician
Credentials M.D.
Gender Male
NPI Issued 09/29/2006

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 SAMUEL CHUNG, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$21

Largest payer

Lilly USA, LLC

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.

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to SAMUEL CHUNG, M.D.. To verify SAMUEL CHUNG, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

SAMUEL CHUNG, M.D. — brand share 17.0%
Specialty average (est.)

17% brand-name claims vs 83% generic, on 2,206 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.

2,206
Total Claims
$251K
Total Drug Cost
213
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,705
Total Day Supply
106,820
Brand vs Generic
17% brand / 83% generic
Brand Drug Cost
$197K
Generic Drug Cost
$53K
Antibiotic Claims
73

Patient Demographics

Average Patient Age
74.1 years
Avg HCC Risk Score
0.91
Gender Split
54% female / 46% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
215
Metformin Hcl
110
Amlodipine Besylate
99
Omeprazole
89
Vascepa
Icosapent Ethyl
73
Januvia
Sitagliptin Phosphate
58
Losartan Potassium
58
Simvastatin
58
Jardiance
Empagliflozin
57
Rosuvastatin Calcium
50

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

General Practice Physician Overview

How SAMUEL CHUNG, M.D. fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

SAMUEL CHUNG, M.D.'s 2,206 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in California

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is SAMUEL CHUNG, M.D.'s specialty?
SAMUEL CHUNG, M.D. specializes in General Practice Physician and practices in MONTEREY PARK, California. Credentials: M.D..
How much does SAMUEL CHUNG, M.D. prescribe under Medicare Part D?
In 2023, SAMUEL CHUNG, M.D. wrote 2,206 Medicare Part D claims totaling $251K in drug costs for 213 beneficiaries.
Where is SAMUEL CHUNG, M.D. located?
SAMUEL CHUNG, M.D. is located at 223 N. GARFIELD AVE, SUITE 301, MONTEREY PARK, CA, 91754. Phone: (626) 572-3688.
What is SAMUEL CHUNG, M.D.'s NPI number?
SAMUEL CHUNG, M.D.'s National Provider Identifier (NPI) is 1992897458, issued on 09/29/2006.
Does SAMUEL CHUNG, M.D. prescribe more brand-name or generic drugs?
SAMUEL CHUNG, M.D.'s prescribing is 17% brand-name and 83% generic drugs by claim count, with $197K in brand drug costs.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does SAMUEL CHUNG, M.D. prescribe most often?
Based on 2023 Medicare Part D data, SAMUEL CHUNG, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metformin Hcl, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SAMUEL CHUNG, M.D. accept Medicare?
SAMUEL CHUNG, M.D. appears in CMS Medicare data with 2,206 Part D claims and 213 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SAMUEL CHUNG, M.D.'s credentials?
SAMUEL CHUNG, M.D.'s NPI is 1992897458 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