Rachel Blair Marie Bass, MD
Emergency Medicine Physician · Los Angeles, CA
Rachel Blair Marie Bass, MD is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1457834731, issued on Sep 12, 2018. Check the license (California A190319, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rachel Blair Marie Bass
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A190319 CA
Self-reported in NPPES; status is on the state search - Practice location
- 757 Westwood Plz, Los Angeles, CA 90095
- Phone
- (310) 825-9111
- Enumerated
- Sep 12, 2018
- Record last updated
- May 27, 2025
- Medicare enrollment
- Enrolled (PECOS I20250530003311); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2022
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 757 Westwood Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tatiana AbdulnourStudent in an Organized Health Care Education/Training Program1700724648
Verify Rachel Blair Marie Bass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A190319Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average emergency medicine physician in 2024
59 Medicare Part D claims for 39 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachel Blair Marie Bass among 7,751 emergency medicine physician records in California
Rachel Blair Marie Bass, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 81% of them.
- NPI issued2018 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2022 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rebecca Bavolek, MDLos Angeles, CA 900951942407556
- Robert Casey, MDLos Angeles, CA 900951790904597
- Priscilla Hanudel, M.D.Los Angeles, CA 900951902068505
- Gregory Hendey, MDLos Angeles, CA 900951942317391
- Aliasgher Hussain, M.D.Los Angeles, CA 900951699986810
- Amy Peng, M.D.Los Angeles, CA 900951578546479
- Jason Prystowsky, MDLos Angeles, CA 900951669407391
- Robert Rodriguez, MDLos Angeles, CA 900951194769091
Common questions
What is Rachel Blair Marie Bass, MD's NPI number?
Rachel Blair Marie Bass, MD's National Provider Identifier (NPI) is 1457834731, issued on Sep 12, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Rachel Blair Marie Bass, MD located?
The NPPES record lists a practice address at 757 Westwood Plz, Los Angeles, CA, 90095. Phone: (310) 825-9111. Providers update this record themselves, so call before visiting.
How can I verify Rachel Blair Marie Bass, MD's license?
NPPES lists California license number A190319, 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 Rachel Blair Marie Bass, MD prescribe under Medicare Part D?
In 2024, Rachel Blair Marie Bass, MD had 59 Medicare Part D claims for 39 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.