Michelle Hiromi Siu
Physician Assistant · Hawthorne, CA
Michelle Hiromi Siu is a physician assistant with a practice address in Hawthorne, California, and NPI 1154815884, issued on Jun 16, 2018. Check the license (California 55382, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michelle Hiromi Siu
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 55382 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2301 W EL Segundo Blvd, Hawthorne, CA 90250
- Phone
- (323) 757-2118
- Enumerated
- Jun 16, 2018
- Record last updated
- Mar 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20250826004437); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2301 W EL Segundo Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michelle Hiromi Siu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 55382Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Carbon Health Medical Group OF California PCLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michelle Hiromi Siu among 14,451 physician assistant records in California
Michelle Hiromi Siu is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 52% of them.
- NPI issued2018 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2017 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 physician assistant records list a practice address in Hawthorne
They are 23 of the 818 NPPES records with a practice address in Hawthorne, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Hawthorne → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Katherine Brechtelsbauer, PA-CHawthorne, CA 902501821325515
- Aaron Clothier, P.A.Hawthorne, CA 902501760767149
- Rajender Dabas, P.A.-CHawthorne, CA 902501891949681
- Ashley Daniels, PA-C, MPHHawthorne, CA 902501861802571
- Michaelen Diiorio, P.A.Hawthorne, CA 902501144499534
- Carrie Hawkins, P.A.Hawthorne, CA 902501932234374
- Trenton Honda, PA-CHawthorne, CA 902501710212519
- Ronald Kaufmann, PACHawthorne, CA 902501558542449
Common questions
What is Michelle Hiromi Siu's NPI number?
Michelle Hiromi Siu's National Provider Identifier (NPI) is 1154815884, issued on Jun 16, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Hiromi Siu located?
The NPPES record lists a practice address at 2301 W EL Segundo Blvd, Hawthorne, CA, 90250. Phone: (323) 757-2118. Providers update this record themselves, so call before visiting.
How can I verify Michelle Hiromi Siu's license?
NPPES lists California license number 55382, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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.