Rebecca Wellmann Nayeri, M.D.
Hematology & Oncology Physician · Los Angeles, CA
Rebecca Wellmann Nayeri, M.D. is a hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1063943140, issued on Mar 21, 2017. Check the license (California A157191, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rebecca Wellmann Nayeri
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A157191 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11301 Wilshire Blvd RM 4237, Los Angeles, CA 90073
- Phone
- (310) 478-3711
- Enumerated
- Mar 21, 2017
- Record last updated
- Jan 7, 2025
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Verify Rebecca Wellmann Nayeri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A157191Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $141.63
1 payment: food and beverage; the largest payer was Heartflow, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Rebecca Wellmann Nayeri among 1,583 hematology & oncology physician records in California
Rebecca Wellmann Nayeri, M.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 89% of them.
- NPI issued2017 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Los Angeles → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Cecilia Kim, MDLos Angeles, CA 900731861415820
- Jennifer Malin, MD, PHDLos Angeles, CA 900731134300734
- Sanjai Sharma, MDLos Angeles, CA 900731659458867
- Taras Benzar, MDLos Angeles, CA 900671861924391
- David Berz, MD, PHD, MPHLos Angeles, CA 900671437375128
- Shahrooz Eshaghian, M.D.Los Angeles, CA 900671417132499
- Robert Leibowitz, MDLos Angeles, CA 900671841253192
- Preet Chaudhary, M.D., PHDLos Angeles, CA 900891487626354
Common questions
What is Rebecca Wellmann Nayeri, M.D.'s NPI number?
Rebecca Wellmann Nayeri, M.D.'s National Provider Identifier (NPI) is 1063943140, issued on Mar 21, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Wellmann Nayeri, M.D. located?
The NPPES record lists a practice address at 11301 Wilshire Blvd RM 4237, Los Angeles, CA, 90073. Phone: (310) 478-3711. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Wellmann Nayeri, M.D.'s license?
NPPES lists California license number A157191, 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.