Denis J. Yoshii, D.O.
Allergy & Immunology Physician · Costa Mesa, CA
Denis J. Yoshii, D.O. is an allergy & immunology physician with a practice address in Costa Mesa, California, and NPI 1124091814, issued on Feb 11, 2006. Check the license (California 20A6936, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Denis J. Yoshii
- Credential
- D.O.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- 20A6936 CA
1005 NV
Self-reported in NPPES; status is on the state search - Practice location
- 1700 Adams Ave Ste 100, Costa Mesa, CA 92626
- Phone
- (714) 549-0301
- Enumerated
- Feb 11, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 549-7553
- Medicare enrollment
- Enrolled (PECOS I20060118000847); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Verify Denis J. Yoshii in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6936Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
299 Medicare Part D claims for 58 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Albuterol Sulfate Hfa37 claims
- Fluticasone Propionate19 claims
- Levocetirizine Dihydrochloride19 claims
- Azithromycin17 claims
- Montelukast Sodium14 claims
- Trelegy Ellipta14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $968.69
51 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Denis J. Yoshii among 444 allergy & immunology physician records in California
Denis J. Yoshii, D.O. is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1995 · median 2004 among the 281 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Costa Mesa → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Chongjia Chen, MDIrvine, CA 926181285021618
- Christine Panganiban, MD, MSFoothill Ranch, CA 926101417310558
- Steven Weinstein, MDHuntington Beach, CA 926471518035120
- Vivian Aranez, M.D.Huntington Beach, CA 926481699032805
- Soo Hyun Choi, M.D.Irvine, CA 926041851596779
- Francis Yu, M.D.Irvine, CA 926041184651283
- Kristen Walters, MDAliso Viejo, CA 926561437442308
- Loula Amin, M.D.Newport Beach, CA 926601043452782
Common questions
What is Denis J. Yoshii, D.O.'s NPI number?
Denis J. Yoshii, D.O.'s National Provider Identifier (NPI) is 1124091814, issued on Feb 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Denis J. Yoshii, D.O. located?
The NPPES record lists a practice address at 1700 Adams Ave Ste 100, Costa Mesa, CA, 92626. Phone: (714) 549-0301. Providers update this record themselves, so call before visiting.
How can I verify Denis J. Yoshii, D.O.'s license?
NPPES lists California license number 20A6936, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Denis J. Yoshii, D.O. prescribe under Medicare Part D?
In 2024, Denis J. Yoshii, D.O. had 299 Medicare Part D claims for 58 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.