NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1124091814 D.O.
Verify on CMS → Denis Yoshii, D.O.
Allergy & Immunology Physician in Costa Mesa, 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 3,394 in Allergy & Immunology Physician, 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
269
Medicare Part D claims · 54 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
63%
generic claims · 37% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$968.69
51 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Denis Yoshii, D.O. filed 269 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Costa Mesa, California, prescribing 63% generic.
- 269
- Part D claims, 2023
- 63%
- generic prescribing
- $968.69
- industry payments (Sunshine Act)
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.
Denis Yoshii, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
269 49th percentile higher than 49% 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
◑
Board-eligible specialty (heuristic, not verified)
Denis Yoshii, D.O. 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 Denis Yoshii, D.O.?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
269 65% vs specialty avg
Specialty distribution in California
How Allergy & Immunology Physician 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 Allergy & Immunology Physician. 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).
Denis Yoshii, D.O. appears in the CMS NPPES registry as an Allergy & Immunology Physician provider holding D.O. credentials at 1700 ADAMS AVE STE 100, Costa Mesa, CA, 92626, with a listed phone of (714) 549-0301. NPI 1124091814 was issued on 02/11/2006.
Medicare Part D records for calendar year 2023 show 269 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $131K in drug spend, split 37% brand-name and 63% generic by claim count.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,394 enrolled providers across 52 states and an average of 764 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 | 1124091814 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 02/11/2006 |
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 Denis Yoshii, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$969
Largest payer
Regeneron Healthcare Solutions, Inc.
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 Denis Yoshii, D.O.. To verify Denis Yoshii, D.O.'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 · Above average
Denis Yoshii, D.O. - brand share 37.0%
Allergy & Immunology Physician average
37% brand-name claims vs 63% generic, on 269 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.
269
Total Claims
$131K
Total Drug Cost
54
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 410
- Total Day Supply
- 11,509
- Brand vs Generic
- 37% brand / 63% generic
- Brand Drug Cost
- $126K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Denis Yoshii, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Albuterol Sulfate …
Albuterol Sulfate Hfa
27 claims
- Montelukast Sodium
Montelukast Sodium
24 claims
- Levocetirizine Dih…
Levocetirizine Dihydrochloride
22 claims
- Fluticasone Propio…
Fluticasone Propionate
21 claims
- Breo Ellipta
Breo Ellipta
15 claims
- Ipratropium Bromide
Ipratropium Bromide
15 claims
- Dupixent Syringe
Dupixent Syringe
13 claims
- Hydroxyzine Hcl
Hydroxyzine Hcl
12 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 27 |
| Montelukast Sodium | 24 |
| Levocetirizine Dihydrochloride | 22 |
| Fluticasone Propionate | 21 |
| Breo Ellipta Fluticasone/Vilanterol | 15 |
| Ipratropium Bromide | 15 |
| Dupixent Syringe Dupilumab | 13 |
| Hydroxyzine Hcl | 12 |
| Omeprazole | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How Denis Yoshii, D.O. fits within the Allergy & Immunology Physician landscape nationally.
3,394
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Denis Yoshii, D.O.'s 269 claims are below the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Yoshii.
Dr. Seema Aceves
M.D., PH.D.
San Diego, CA
Dr. Daniel Adelman
M.D.
San Francisco, CA
Dr. Rhonda Alkatib
M.D.
San Diego, CA
Dr. Mercedes Amado
M.D.
San Diego, CA
Dr. Loula Amin
M.D.
Newport Beach, CA
Compare Allergy & Immunology Physician 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 Allergy & Immunology Physician 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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Frequently Asked Questions
What is Denis Yoshii, D.O.'s specialty? ▼
Denis Yoshii, D.O. specializes in Allergy & Immunology Physician and practices in Costa Mesa, California. Credentials: D.O..
How much does Denis Yoshii, D.O. prescribe under Medicare Part D? ▼
In 2023, Denis Yoshii, D.O. wrote 269 Medicare Part D claims totaling $131K in drug costs for 54 beneficiaries.
Where is Denis Yoshii, D.O. located? ▼
Denis Yoshii, D.O. is located at 1700 ADAMS AVE STE 100, Costa Mesa, CA, 92626. Phone: (714) 549-0301.
What is Denis Yoshii, D.O.'s NPI number? ▼
Denis Yoshii, D.O.'s National Provider Identifier (NPI) is 1124091814, issued on 02/11/2006.
Does Denis Yoshii, D.O. prescribe more brand-name or generic drugs? ▼
Denis Yoshii, D.O.'s prescribing is 37% brand-name and 63% generic drugs by claim count, with $126K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,394 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does Denis Yoshii, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Denis Yoshii, D.O.'s most frequently prescribed drugs include Albuterol Sulfate Hfa, Montelukast Sodium, Levocetirizine Dihydrochloride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Denis Yoshii, D.O. accept Medicare? ▼
Denis Yoshii, D.O. appears in CMS Medicare data with 269 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Denis Yoshii, D.O.'s credentials? ▼
Denis Yoshii, D.O.'s NPI is 1124091814 with credentials D.O.. 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
Compiled from official public sources by the PlainDoctor editorial team.
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.