2026 NPPES data Dermatology Physician NPI 1164797312 MD
Verify on CMS →

EVELYN CHEUNG, MD

Dermatology Physician in DOWNEY, 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 · 685 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: EVELYN CHEUNG, MD is a Dermatology Physician ([object Object]) practicing in DOWNEY, California with a Medicare Part D prescribing footprint of 2K claims across 685 beneficiaries — 13% brand-name prescribing .

What stands out: EVELYN CHEUNG, MD filed 1,918 Medicare Part D claims in 2023 across DOWNEY, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

EVELYN CHEUNG, MD 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).

EVELYN CHEUNG, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/20/2012

NPI 1164797312

Primary specialty

Dermatology Physician

Mid-sized

14,610 US NPIs in this specialty

Medicare Part D claims

1,918 163% vs specialty avg

2023 prescription claims

Specialty avg: 729

Specialty distribution in California

How Dermatology Physician compares to other specialties among California providers

California providers

Dermatology Physician share within California

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

Specialty board-certification context

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

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

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

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

EVELYN CHEUNG, MD is a Dermatology Physician provider practicing in DOWNEY, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1164797312. 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.

EVELYN CHEUNG, MD appears in the CMS NPPES registry as a Dermatology Physician provider holding MD credentials at 9449 IMPERIAL HWY STE 211, DOWNEY, CA, 90242, with a listed phone of (562) 657-1331. NPI 1164797312 was issued on 03/20/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHEUNG 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 1,918 prescription claims written by this provider, covering 685 Medicare beneficiaries and totaling roughly $573K in drug spend, split 13% brand-name and 87% 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.

Dermatology Physician is a mid-sized specialty nationwide, with 14,610 enrolled providers across 53 states and an average of 729 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

9449 IMPERIAL HWY STE 211
DOWNEY, CA 90242

Provider Details

NPI 1164797312
Specialty Dermatology Physician
Credentials MD
Gender Female
NPI Issued 03/20/2012

Hospital and facility affiliations

Facilities where EVELYN CHEUNG, 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
SAN DIMAS, 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).

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 EVELYN CHEUNG, MD. To verify EVELYN CHEUNG, MD'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

EVELYN CHEUNG, MD — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 1,918 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.

1,918
Total Claims
$573K
Total Drug Cost
685
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,266
Total Day Supply
61,561
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$513K
Generic Drug Cost
$60K
Antibiotic Claims
44

Patient Demographics

Average Patient Age
74.1 years
Avg HCC Risk Score
1.20
Gender Split
56% female / 44% male
Age Distribution
<65: 27, 65-74: 354, 75-84: 220, 85+: 84

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Clobetasol Propionate
264
Triamcinolone Acetonide
173
Ketoconazole
139
Betamethasone Diprop Augmented
Betamethasone/Propylene Glyc
120
Tacrolimus
119
Metronidazole
83
Fluorouracil
71
Fluocinonide
56
Mometasone Furoate
55
Mupirocin
55

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

Dermatology Physician Overview

How EVELYN CHEUNG, MD fits within the Dermatology Physician landscape nationally.

14,610
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider

EVELYN CHEUNG, MD's 1,918 claims are above the specialty average of 729.

Nearby Dermatology Physician Providers in California

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

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

Frequently Asked Questions

What is EVELYN CHEUNG, MD's specialty?
EVELYN CHEUNG, MD specializes in Dermatology Physician and practices in DOWNEY, California. Credentials: MD.
How much does EVELYN CHEUNG, MD prescribe under Medicare Part D?
In 2023, EVELYN CHEUNG, MD wrote 1,918 Medicare Part D claims totaling $573K in drug costs for 685 beneficiaries.
Where is EVELYN CHEUNG, MD located?
EVELYN CHEUNG, MD is located at 9449 IMPERIAL HWY STE 211, DOWNEY, CA, 90242. Phone: (562) 657-1331.
What is EVELYN CHEUNG, MD's NPI number?
EVELYN CHEUNG, MD's National Provider Identifier (NPI) is 1164797312, issued on 03/20/2012.
Does EVELYN CHEUNG, MD prescribe more brand-name or generic drugs?
EVELYN CHEUNG, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $513K in brand drug costs.
How many Dermatology Physician providers are there in the US?
There are 14,610 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
What drugs does EVELYN CHEUNG, MD prescribe most often?
Based on 2023 Medicare Part D data, EVELYN CHEUNG, MD's most frequently prescribed drugs include Clobetasol Propionate, Triamcinolone Acetonide, Ketoconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does EVELYN CHEUNG, MD accept Medicare?
EVELYN CHEUNG, MD appears in CMS Medicare data with 1,918 Part D claims and 685 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify EVELYN CHEUNG, MD's credentials?
EVELYN CHEUNG, MD's NPI is 1164797312 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

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