NPI registry status
Active
2026 NPPES data Specialist NPI 1336226398 M.D.
Verify on CMS → Deanna Cheung, M.D.
Specialist in Los Alamitos, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,608 in Specialist, 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
734
Medicare Part D claims · 53 beneficiaries · Specialist avg: 1K
Generic prescribing
76%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Deanna Cheung, M.D. filed 734 Medicare Part D claims in 2023 as a Specialist in Los Alamitos, California, prescribing 76% generic.
- 734
- Part D claims, 2023
- 76%
- generic prescribing
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.
Deanna Cheung, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
734 Top 29% higher than 71% 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
What does the federal data show about Deanna Cheung, M.D.?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
734 50% vs specialty avg
Specialty distribution in California
How Specialist compares to other specialties among California 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 Specialist. 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).
Deanna Cheung, M.D. appears in the CMS NPPES registry as a Specialist provider holding M.D. credentials at 4772 KATELLA AVE STE 200, Los Alamitos, CA, 90720, with a listed phone of (562) 595-9366. NPI 1336226398 was issued on 11/01/2006.
Medicare Part D records for calendar year 2023 show 734 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $106K in drug spend, split 22% brand-name and 76% generic by claim count.
Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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 | 1336226398 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 11/01/2006 |
Hospital and facility affiliations
Facilities where Deanna Cheung, 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
Harbor City, 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 Deanna Cheung, M.D.. To verify Deanna Cheung, 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
Deanna Cheung, M.D. - brand share 22.0%
Specialist average
22% brand-name claims vs 76% generic, on 734 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.
734
Total Claims
$106K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,726
- Total Day Supply
- 50,666
- Brand vs Generic
- 22% brand / 76% generic
- Brand Drug Cost
- $90K
- Generic Drug Cost
- $16K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 77.7 years
- Avg HCC Risk Score
- 1.26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Deanna Cheung, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
67 claims
- Levothyroxine Sodium
Levothyroxine Sodium
49 claims
- Losartan Potassium
Losartan Potassium
38 claims
- Lisinopril
Lisinopril
35 claims
- Amlodipine Besylate
Amlodipine Besylate
29 claims
- Alendronate Sodium
Alendronate Sodium
28 claims
- Synthroid 24
Synthroid
24 claims
- Rosuvastatin Calcium 23
Rosuvastatin Calcium
23 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 67 |
| Levothyroxine Sodium | 49 |
| Losartan Potassium | 38 |
| Lisinopril | 35 |
| Amlodipine Besylate | 29 |
| Alendronate Sodium | 28 |
| Synthroid Levothyroxine Sodium | 24 |
| Rosuvastatin Calcium | 23 |
| Escitalopram Oxalate | 20 |
| Metformin Hcl | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Deanna Cheung, M.D. fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Deanna Cheung, M.D.'s 734 claims are below the specialty average of 1,474.
Nearby Specialist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Cheung.
Adrienne Abad Santos
San Francisco, CA
Dr. Brenda Abarca
MD
Torrance, CA
Dr. Fatemeh Abbasi
PT
Van Nuys, CA
Dr. Erlinda Abcede
M.D.
Cudahy, CA
Dr. Maher Abdallah
M.D.
Palm Springs, CA
Compare Specialist 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Specialist 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.
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Medical Specialties Explained
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Frequently Asked Questions
What is Deanna Cheung, M.D.'s specialty? ▼
Deanna Cheung, M.D. specializes in Specialist and practices in Los Alamitos, California. Credentials: M.D..
How much does Deanna Cheung, M.D. prescribe under Medicare Part D? ▼
In 2023, Deanna Cheung, M.D. wrote 734 Medicare Part D claims totaling $106K in drug costs for 53 beneficiaries.
Where is Deanna Cheung, M.D. located? ▼
Deanna Cheung, M.D. is located at 4772 KATELLA AVE STE 200, Los Alamitos, CA, 90720. Phone: (562) 595-9366.
What is Deanna Cheung, M.D.'s NPI number? ▼
Deanna Cheung, M.D.'s National Provider Identifier (NPI) is 1336226398, issued on 11/01/2006.
Does Deanna Cheung, M.D. prescribe more brand-name or generic drugs? ▼
Deanna Cheung, M.D.'s prescribing is 22% brand-name and 76% generic drugs by claim count, with $90K in brand drug costs.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Deanna Cheung, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Deanna Cheung, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Deanna Cheung, M.D. accept Medicare? ▼
Deanna Cheung, M.D. appears in CMS Medicare data with 734 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Deanna Cheung, M.D.'s credentials? ▼
Deanna Cheung, M.D.'s NPI is 1336226398 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
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.