Joshua Andrew Siembieda, M.D.
Pediatrics Physician · Torrance, CA
Joshua Andrew Siembieda, M.D. is a pediatrics physician with a practice address in Torrance, California, and NPI 1225322357, issued on Jun 7, 2011. Check the license (California A124630, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joshua Andrew Siembieda
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A124630 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 W Carson St, Torrance, CA 90502
- Phone
- (310) 222-3503
- Enumerated
- Jun 7, 2011
- Record last updated
- Sep 20, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (310) 212-6101
- Medicare enrollment
- Enrolled (PECOS I20150722004089); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 1000 W Carson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arjan AbarStudent in an Organized Health Care Education/Training Program1982309290
- Brenda Abarca, MDPsychiatry Physician1407485527
- Maleeha AbbasStudent in an Organized Health Care Education/Training Program1275203499
- Saamirah Abdul-MuminCommunity Health Worker1144683947
- Maria Elena AbedesAmbulatory Care Registered Nurse1184360992
- Hoda Abou-Ziab, PSYDClinical Psychologist1649618125
Verify Joshua Andrew Siembieda in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A124630Check 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
- Emergency Medicine Specialists OF Orange CountyOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joshua Andrew Siembieda among 9,272 pediatrics physician records in California
Joshua Andrew Siembieda, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2011 · median 2012 among the 754 with a school on file
- Record last updated2014 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
100 pediatrics physician records list a practice address in Torrance
They are 100 of the 8,901 NPPES records with a practice address in Torrance, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Torrance → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Esther An, M.D.Torrance, CA 905021407056617
- Nicole Baier, MDTorrance, CA 905021083808604
- Grant Christman, M.D.Torrance, CA 905021831381771
- Amy Davis, M.D.Torrance, CA 905021346432275
- Laura Figueroa-Phillips, MDTorrance, CA 905021295029429
- Michelle Healy, M.D.Torrance, CA 905021861696734
- Amy Lau, MDTorrance, CA 905021245430396
- Seung Lee, MDTorrance, CA 905021922019348
Common questions
What is Joshua Andrew Siembieda, M.D.'s NPI number?
Joshua Andrew Siembieda, M.D.'s National Provider Identifier (NPI) is 1225322357, issued on Jun 7, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Andrew Siembieda, M.D. located?
The NPPES record lists a practice address at 1000 W Carson St, Torrance, CA, 90502. Phone: (310) 222-3503. Providers update this record themselves, so call before visiting.
How can I verify Joshua Andrew Siembieda, M.D.'s license?
NPPES lists California license number A124630, 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.
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.