Katayoun Toosie, M.D.
Specialist · Oceanside, CA
Katayoun Toosie, M.D. is a specialist with a practice address in Oceanside, California, and NPI 1568471092, issued on Aug 5, 2006. Check the license (California A60211, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katayoun Toosie
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A60211 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3998 Vista Way, Oceanside, CA 92056
- Phone
- (760) 724-5352
- Enumerated
- Aug 5, 2006
- Record last updated
- Nov 12, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (760) 724-5447
- Medicare enrollment
- Enrolled (PECOS I20061214000255); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1994
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3998 Vista Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael BonillaCounselor1265099295
- Kenneth Carr, M.D.Cardiovascular Disease Physician1245255439
- Andrew Deemer, MDVascular Surgery Physician1578568432
- Adam Fierer, MDSurgery Physician1205831161
- Jean Folkerth, CRNFACertified Registered Nurse Anesthetist1881744928
- Todd Grehl, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1720054257
Verify Katayoun Toosie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A60211Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average specialist in 2024
114 Medicare Part D claims for 68 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 15 claims were for opioids.
Most prescribed
- Cephalexin55 claims
- Fluconazole15 claims
- Sulfamethoxazole-Trimethoprim12 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.
The MIPS final score for 2023 (Medicare payment program): 11.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Katayoun Toosie among 5,749 specialist records in California
Katayoun Toosie, M.D. is one of 5,749 specialist records with a practice address in California. 30% 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, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1994 · median 1989 among the 1,075 with a school on file
- Record last updated2013 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Oceanside → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Emad Bishay, M.D.Oceanside, CA 920561821087511
- Karen Brown, PA-COceanside, CA 920561508809666
- Perrin Curran, M.D.Oceanside, CA 920561598754079
- Barry Dzindzio, MDOceanside, CA 920561750371407
- Bradley Frasier, MDOceanside, CA 920561013932045
- Michael Guerena, MDOceanside, CA 920561841222171
- Russell Holmes, MDOceanside, CA 920561598837163
- Cyril Kellett, MDOceanside, CA 920561558383836
Common questions
What is Katayoun Toosie, M.D.'s NPI number?
Katayoun Toosie, M.D.'s National Provider Identifier (NPI) is 1568471092, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katayoun Toosie, M.D. located?
The NPPES record lists a practice address at 3998 Vista Way, Oceanside, CA, 92056. Phone: (760) 724-5352. Providers update this record themselves, so call before visiting.
How can I verify Katayoun Toosie, M.D.'s license?
NPPES lists California license number A60211, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Katayoun Toosie, M.D. prescribe under Medicare Part D?
In 2024, Katayoun Toosie, M.D. had 114 Medicare Part D claims for 68 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Katayoun Toosie, M.D.'s MIPS final score?
The 2023 MIPS final score is 11.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.