Sierra Simmons, M.D.
Blood Banking & Transfusion Medicine Physician · Orange, CA
Sierra Simmons, M.D. is a blood banking & transfusion medicine physician with a practice address in Orange, California, and NPI 1750726014, issued on Apr 30, 2013. Check the license (California C-192196, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sierra Simmons
- Credential
- M.D.
- Primary taxonomy
- Blood Banking & Transfusion Medicine Physician 207ZB0001X
- License number
- C-192196 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 450-3875
- Enumerated
- Apr 30, 2013
- Record last updated
- Oct 21, 2024
- Medicare enrollment
- Enrolled (PECOS I20241209002718); accepts Medicare assignment
- Medical or professional school
- University Of Nevada School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest blood banking & transfusion medicine physician records → All 54 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Sierra Simmons in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C-192196Check 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
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sierra Simmons among 54 blood banking & transfusion medicine physician records in California
Sierra Simmons, M.D. is one of 54 blood banking & transfusion medicine physician records with a practice address in California. 44% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 69% of them.
- NPI issued2013 · 69% of these records are older, 26% newer
- In a Medicare fileYes · 44% of these records are
- In the CMS Doctors and Clinicians fileYes · 39% of these records are
- Graduated2013 · median 2011 among the 21 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZB0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Blood Banking & Transfusion Medicine Physician providers in California
There are 54 blood banking & transfusion medicine physician records in California.
All 54 in California → Every provider in Orange → Blood Banking & Transfusion Medicine Physician nationwide →
The 8 blood banking & transfusion medicine physician records with the nearest ZIP codes
- Gagan Mathur, MD, MBAOrange, CA 928681386999175
- Jesse Qiao, M.D.Orange, CA 928681225340722
- Jennifer Woo, MDIrvine, CA 926181265876510
- Yung-Kang Chow, M.D., A.M.Irvine, CA 926031205190337
- Wesley Stevens, M.D.Loma Linda, CA 923541760591416
- Karine Hollis-Perry, M.D.San Diego, CA 921341518946623
- Michael Bonin, MDSan Diego, CA 921201003964974
- Elizabeth Allen, M.D.San Diego, CA 921031174814065
Common questions
What is Sierra Simmons, M.D.'s NPI number?
Sierra Simmons, M.D.'s National Provider Identifier (NPI) is 1750726014, issued on Apr 30, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Sierra Simmons, M.D. located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 450-3875. Providers update this record themselves, so call before visiting.
How can I verify Sierra Simmons, M.D.'s license?
NPPES lists California license number C-192196, 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.